CN106054359B - A kind of ultra-short focus projection lens and laser projection device - Google Patents
A kind of ultra-short focus projection lens and laser projection device Download PDFInfo
- Publication number
- CN106054359B CN106054359B CN201610675937.8A CN201610675937A CN106054359B CN 106054359 B CN106054359 B CN 106054359B CN 201610675937 A CN201610675937 A CN 201610675937A CN 106054359 B CN106054359 B CN 106054359B
- Authority
- CN
- China
- Prior art keywords
- lens
- spherical lens
- ultra
- spherical
- short focus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000003384 imaging method Methods 0.000 claims abstract description 60
- 230000003287 optical effect Effects 0.000 claims abstract description 45
- 238000012937 correction Methods 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000005499 meniscus Effects 0.000 claims description 2
- 239000000571 coke Substances 0.000 claims 3
- 230000004075 alteration Effects 0.000 abstract description 35
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 206010010071 Coma Diseases 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 241000193935 Araneus diadematus Species 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000004304 visual acuity Effects 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010073261 Ovarian theca cell tumour Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 208000001644 thecoma Diseases 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0875—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more refracting elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/28—Reflectors in projection beam
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a kind of ultra-short focus projection lens, belong to projection art.Ultra-short focus projection lens include refracting set and reflection microscope group, and image strip in refracting set and reflects progress first time imaging between microscope group, first time imaging is reflexed to projection screen formation and is imaged for the second time by reflection microscope group after refracting set；Refracting set includes the first lens group and the second lens group, all has two panels non-spherical lens in the first lens group and the second lens group；Reflecting microscope group includes a reflecting mirror, after being placed in second lens group；Refracting set and reflection microscope group are in same primary optical axis；The image of second of imaging is 140% ~ 150% relative to the offset of primary optical axis.Ultra-short focus projection lens provided by the invention can be realized the projection of short focus large scale picture, and have preferable aberration correcting capability, can be improved projection imaging quality.
Description
Technical field
The present invention relates to projection art, in particular to a kind of ultra-short focus projection lens and laser projection device.
Background technique
With the raising of science and technology, projection imaging system in people's work and life using more and more extensive, than
Such as education, office, household or amusement.Wherein, ultrashort out-of-focus projection can effectively shorten the projector distance of projector, and project big
Size picture, the favor by consumer.
Projection lens is the critical component for realizing projection, and in practical applications, projection lens optical system can be because of processing
The reasons such as technique, assembling generate aberration, such as distortion, astigmatism, the curvature of field, coma performance, and aberration is in current projection lens design
The problem that must be faced.
In order to effectively overcome aberration, there are three types of the design methods of camera lens, respectively refraction type, reflective and mixing at present
Formula.
Refraction type:Projection lens is made of spherical lens or non-spherical lens, the image strip big angle after projection lens
Degree outgoing is to achieve the purpose that shorten projector distance.Such projection lens can effectively eliminate big visual field bring aberration, still
The number of lenses of projection lens is big, type is more, and structure is complicated for such projection lens, and the length of camera lens is also not easy to reduce, and can make
The property made is low.
It is reflective:Projection lens is by plane mirror, spherical reflector, non-spherical reflector or free-form surface mirror
Composition achievees the purpose that shorten projector distance by deflecting refractive power repeatedly.But the design form of such projection lens is in the presence of more
Piece is aspherical or free-form surface mirror, and at high cost in the links such as processing, manufacture, detection, manufacturability is low.
It is hybrid:By refraction type and reflective carry out integrated application, it is generally divided into refractor group, reflection microscope group, is mesh
The mainstay mode of preceding ultra-short focus projection lens on the market.
Summary of the invention
The present invention provides the laser projection device of a kind of ultra-short focus projection lens and the application ultra-short focus projection lens, energy
Enough realize overcomes aberration, improves projection imaging quality.
For achieving the above object, it adopts the following technical scheme that：
A kind of ultra-short focus projection lens, including refracting set and reflection microscope group, image strip are being rolled over after refracting set
It penetrates between microscope group and reflection microscope group and carries out first time imaging, first time imaging is reflexed to projection screen and forms second by reflection microscope group
Secondary imaging；
Refracting set includes the first lens group and the second lens group, all has two panels in the first lens group and the second lens group
Non-spherical lens；Reflecting microscope group includes a reflecting mirror, after being placed in the second lens group；
Refracting set and reflection microscope group are in same primary optical axis；
The image of second of imaging is 140% ~ 150% relative to the offset of primary optical axis；
Preferably, the projection of ultra-short focus projection lens is compared between 0.2 ~ 0.3；
Preferably, refracting set and reflection microscope group generate positive diopter, wherein the total length of refracting set is L1, folding
The spacing penetrating microscope group and reflecting between microscope group is L2, and L1, L2 meet：0.65<L1/L2<0.7；
Preferably, the equivalent focal length of ultra-short focus projection lens is F1, and the equivalent focal length of the first lens group is F2, the second lens
The equivalent focal length of group is F3, and the equivalent focal length for reflecting microscope group is F4, and F1, F2, F3, F4 meet：
5 < | F2/F1 | < 9 ；
7 < | F3/F1 | < 100；
5 < | F4/F1 | < 15；
Preferably, the effective focal length of ultra-short focus projection lens is -3.3mm ~ -3.5mm；
Preferably, reflecting mirror is concave surface non-spherical reflector or free-form surface mirror；
Preferably, ultra-short focus projection lens further include aperture diaphragm, and aperture diaphragm is located at the first lens group and the second lens
Between group, aperture diaphragm and refracting set and reflection microscope group are in same primary optical axis, and aperture diaphragm is for limiting ultrashort out-of-focus projection
The light passing amount of camera lens；
Preferably, the first lens group includes at least one spherical lens and the first non-spherical lens, the second non-spherical lens,
At least provided with a spherical lens between two non-spherical lenses；
Second lens group includes at least one spherical lens and third non-spherical lens, the 4th non-spherical lens, and two non-
At least provided with a spherical lens between spherical lens；
Preferably, the first non-spherical lens is a meniscus, and the second non-spherical lens is a biconvex lens, and/or,
Third non-spherical lens is a concave-convex lens, and the 4th non-spherical lens is a biconcave lens；
Preferably, the first lens group successively includes that the first non-spherical lens, the first spherical surface are saturating along the direction of light beam incidence
Mirror, the second spherical lens, third spherical lens, the 4th spherical lens and the second non-spherical lens, the diopter of above-mentioned each lens
It is successively negative, bears, is negative, positive, is positive and negative；
Alternatively, including the first spherical lens, the first non-spherical lens, the second spherical lens, third spherical lens, the 4th ball
The diopter of face lens and the second non-spherical lens, above-mentioned each lens is successively negative, bears, is negative, positive, is positive and negative；
Preferably, the second lens group successively includes that third non-spherical lens, the 5th spherical surface are saturating along the direction of light beam incidence
Mirror, the 6th spherical lens, the 7th spherical lens, the 8th spherical lens, the 9th spherical lens, the tenth spherical lens, the 11st ball
Face lens and the 4th non-spherical lens, the diopter of said lens are successively positive, are positive and negative, is negative, positive, is negative, positive, is negative, positive；
Preferably, the order of the higher order coefficient of the aspherical equation of the first non-spherical lens is greater than or equal to default first threshold
Value, the order of the higher order coefficient of the aspherical equation of the second non-spherical lens are greater than or equal to default second threshold；
And the order of the higher order coefficient of the aspherical equation of third non-spherical lens is greater than or equal to default third threshold
Value, the order of the higher order coefficient of the aspherical equation of the 4th non-spherical lens are greater than or equal to default 4th threshold value；
Preferably, the first preset threshold, the second preset threshold, third predetermined threshold value, the 4th preset threshold be greater than etc.
In 10 integer.
Second aspect, the invention also discloses a kind of laser projection devices, including laser light source, for providing illumination light
Beam；Ray machine, including light valve, for forming image strip, feature after being modulated according to image processing signal to illuminating bundle
It is, further includes the ultra-short focus projection lens of any of the above-described technical solution, wherein image strip is reflexed to ultrashort burnt throwing by light valve
Shadow camera lens, ultra-short focus projection lens are used to be projected to projection screen imaging to after image strip correction amplification；
Preferably, the offset of light valve biasing ultra-short focus projection lens primary optical axis meets：1.2<A/B<1.5, wherein A refers to
The height of light valve, B refer to optical axis to the distance of the upper end of light valve；
It preferably, further include mobile eyeglass between light valve and ultra-short focus projection lens, mobile eyeglass is shaken with predeterminated frequency
It is dynamic, and in previous moment and current time transmission or reflection image strip, be respectively at different positions so as to it is previous when
It carves and the image strip of current time transmission or reflection misplaces and is overlapped.
The technical solution provided in the embodiment of the present invention at least has the advantages that：
Ultra-short focus projection lens provided in an embodiment of the present invention include refracting set and reflection microscope group, wherein refracting set
Reflection microscope group is incident to for carrying out first time imaging to incident image strip, and by first time imaging, and reflection microscope group is by the
The Polaroid projection screen that reflexes to be imaged for the second time, and the image of second of imaging has biggish inclined relative to primary optical axis
Shifting amount, to be conducive to realize the projection of short focus large scale.Wherein, refracting set is all had by the first lens group and the second lens group
Two panels non-spherical lens has preferable aberration correction ability, and, reflection microscope group can shorten light path, realize short focus projection
While, Off-axis aberrations can be corrected, improve the resolving power of camera lens.
Laser projection device provided by the invention, can be while realizing ultrashort out-of-focus projection, and aberration correction ability is strong, energy
Fine definition, high-resolution projected image are enough projected, projected picture quality is high.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
Invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and in specification together principle for explaining the present invention.
Figure 1A is a kind of configuration diagram for ultra-short focus projection lens that the embodiment of the present invention one provides；
Figure 1B is paths schematic diagram in the ultra-short focus projection lens based on Fig. 1；
Fig. 2A is a kind of structure composition schematic diagram of ultra-short focus projection lens provided by Embodiment 2 of the present invention；
Fig. 2 B is lens imaging effect diagram provided in an embodiment of the present invention；
Fig. 3 A is a kind of laser projection device configuration diagram that the embodiment of the present invention three provides；
Fig. 3 B is a kind of laser projection device light path system schematic diagram that the embodiment of the present invention three provides；
Fig. 4 A is another laser projection device schematic diagram of optical system that the embodiment of the present invention three provides；
Fig. 4 B is based on the eyeglass effect diagram in Fig. 4 A.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
Example being described in detail in claims, some aspects of the invention are consistent.
Embodiment one,
One embodiment of the invention provides a kind of ultra-short focus projection lens, and as shown in Figure 1A, ultra-short focus projection lens include
Refracting set 100 and reflection microscope group 130.Refracting set 100 includes the first lens group 110 and the second lens group 120, reflects microscope group
130 include a reflecting mirror, after being placed in the second lens group 120.Refracting set 100 and reflection microscope group 130 are in same primary optical axis
101.Wherein, the first lens group 110 and the second lens group 120 all have two panels non-spherical lens, have preferable aberration correction
Ability.
The light path schematic diagram of ultra-short focus projection lens provided in this embodiment is as shown in Figure 1B, is exported by x ray machine part 140
Image strip after refracting set 100, i.e., successively after 120 refractive transmission of the first lens group 110 and the second lens group,
First time imaging is carried out between refracting set 100 and reflection microscope group 130, Tu1BZhong, 102 be the first time imaging surface, reflection
Microscope group 130 receives the light beam dissipated after imaging for the first time, first time imaging is reflected, and be projected to projection screen and form second
The projected picture that secondary imaging, i.e. eye-observation are arrived.
Wherein, the image of second of imaging is 140% ~ 150%, i.e. shadow relative to the offset (offset) of primary optical axis 101
As light beam is to be projected to projection screen imaging obliquely, projected image and primary optical axis are eccentric.
And in the present embodiment, refracting set 100 and reflection microscope group 130 generate positive diopter, so as to focus
At the picture of amplification factor.Wherein, the total length of refracting set 100 be L1, refracting set 100 and reflection microscope group 130 between
Away from for L2, L1, L2 satisfaction：0.65<L1/L2<0.7.The small volume of the ultra-short focus projection lens.
And ultra-short focus projection lens of the embodiment of the present invention further include aperture diaphragm（It is not shown in the figure）, aperture diaphragm position
Between the first lens group 110 and the second lens group 120, aperture diaphragm is in same with refracting set 100 and reflection microscope group 130
Primary optical axis, aperture diaphragm are used to limit the light passing amount of the ultra-short focus projection lens.
In embodiments of the present invention, the projection of ultra-short focus projection lens is compared between 0.2 ~ 0.3, wherein projection ratio
（throw ratio）Refer to the ratio between the distance between projection lens and projection screen and the width of projected picture, project than smaller,
Perhaps projection device is bigger apart from the screen size that projection screen is closer or projects for projection lens.
In embodiments of the present invention, the equivalent focal length of ultra-short focus projection lens is F1, the equivalent focal length of the first lens group 110
For F2, the equivalent focal length of the second lens group 120 is F3, and the equivalent focal length of reflection microscope group 130 is F4, and F1, F2, F3, F4 meet：
5 < | F2/F1 | < 9 ；
7 < | F3/F1 | < 100；
5 < | F4/F1 | < 15。
Above-mentioned focal length limitation only gives the scope of design of ultra-short focus projection lens of the embodiment of the present invention, all to fall into this focal length
The lens design in range is limited in the protection scope of technical solution of the present invention.
And in the embodiment of the present invention, the effective focal length (Effective Focal Length) of ultra-short focus projection lens
For -3.3mm ~ -3.5mm.
In a specific implementation, effective focal length=- 3.38mm of ultra-short focus projection lens, offset=142% ~ 150%, solution
Analysis ability can achieve 93lp/mm, refer to the lines of every millimeter of 93 groups of alternating black and white, can project screen size be 80 ~
120 inches, projection is than being 0.24 ~ 0.25.
And in another specific implementation, effective focal length=- 3.47mm of ultra-short focus projection lens, offset=142% ~
150%, analytic ability can achieve 93lp/mm, and can project screen size is 80 ~ 120 inches, and projection is than being 0.245
~ 0.255。
To sum up, ultra-short focus projection lens provided in an embodiment of the present invention include refracting set and reflection microscope group, wherein refraction
Microscope group is used to carry out incident image strip first time imaging, and first time imaging is incident to reflection microscope group, reflects microscope group
First time imaging is reflexed into projection screen and carries out second of imaging, the image of second of imaging has larger relative to primary optical axis
Offset, thus be conducive to realize short focus large scale projection.Wherein, refracting set is mentioned by the first lens group and the second lens group
High aberration correction ability, reflection microscope group can shorten light path, while realizing short focus projection, can rectify to Off-axis aberrations
Just, the resolving power of camera lens is improved.
Embodiment two,
The embodiment of the present invention two provides a kind of ultra-short focus projection lens on the basis of embodiment one.
And specifically, as shown in Figure 2 A, along the direction of light beam incidence, refracting set successively includes：First lens group
210, the second lens group 220.
First lens group 210, the second lens group 220 are in same optical axis 201.
First lens group 210 include at least one spherical lens and two non-spherical lenses, two of the first lens group 210
At least one spherical lens is provided between non-spherical lens；When image strip the first lens group 210 of directive, the first lens group
210 correction image strips, and by the second lens group of image strip directive 220 after correction；
Second lens group 220 includes at least one spherical lens and two non-spherical lenses, and two of the second lens group are non-
At least one spherical lens is provided between spherical lens；When image strip the second lens group 220 of directive, the second lens group
220 for correcting image strip, and image strip is exported to next optical component and is imaged.
Specifically, A referring to fig. 2, along the direction of light beam incidence, the first lens group 210 successively includes first aspherical
Mirror 211 and the second non-spherical lens 212, the first non-spherical lens 211 and the second non-spherical lens 212 are in same with refracting set
One optical axis 201.
In a specific implementation, along light beam incident direction, the first lens group 210 includes that the first spherical lens 213, first is non-
Spherical lens 211, the second spherical lens 214, third spherical lens 215, the 4th spherical lens 216 and the second non-spherical lens
212, the diopter of above-mentioned six lens is successively negative, bears, is negative, positive, is positive and negative.
Alternatively, the position of the first non-spherical lens 211 and the first spherical lens can be interchanged in another specific implementation,
I.e. along light beam incident direction, the first lens group 210 includes the first non-spherical lens 211, the first spherical lens 213, the second spherical surface
Lens 214, third spherical lens 215, the 4th spherical lens 216 and the second non-spherical lens 212, above-mentioned six lens are bent
Luminosity is successively negative, bears, is negative, positive, is positive and negative, and the lens in the first lens group 210 are in same optical axis.
And the direction along light beam incidence, the second lens group 220 successively include third non-spherical lens 221 and the 4th
Non-spherical lens 222, third non-spherical lens 221 and the 4th non-spherical lens 222 are in same optical axis 201 with refracting set.
In a specific implementation, along light beam incident direction, the second lens group 220 successively include third non-spherical lens 221,
5th spherical lens 223, the 6th spherical lens 224, the 7th spherical lens 225, the 8th spherical lens 226, the 9th spherical lens
227, the tenth spherical lens 228, the 11st spherical lens 229 and the 4th non-spherical lens 222, the dioptric of above-mentioned nine lens
Degree is successively positive, is positive and negative, is negative, positive, is negative, positive, is negative, positive, and the lens in the second lens group 220 are in same optical axis.
To which the refracting set of the first lens group 210 and the second lens group 220 composition has positive diopter, and receives
The incidence of image strip, thus allows for optical imagery.
For non-spherical lens, the first non-spherical lens 211, the second non-spherical lens 212, third non-spherical lens are influenced
221 and the 4th non-spherical lens 222 imaging factors have aspherical equation higher order coefficient order, the song of non-spherical lens
The diopter of rate, the circular cone coefficient of non-spherical lens and non-spherical lens.
The order of the higher order coefficient of aspherical equation influences non-spherical lens to the edge analytic ability of imaging, when aspherical
When the order of the higher order coefficient of equation is higher, the shape that the curved surface of aspherical equation includes is more complicated, to the light of image strip
Correction ability it is better.
Curvature refers to the inverse of the spherical radius of the close key light shaft portion of non-spherical lens.The present embodiment only to curvature just
Negative to be limited, the curvature for defaulting the reverse optical path direction in convex surface of non-spherical lens is positive.
Circular cone coefficient influences the shape of the curved surface of the dipped beam axis of non-spherical lens, when the circular cone coefficient of non-spherical lens is zero
When, the shape of the curved surface of the dipped beam axis of non-spherical lens is circle, is mainly used for correcting the coma of image strip rim ray.Such as
Fruit circular cone coefficient choose it is improper, will cause light beam deflection it is improper, lead to image blur problem.
Diopter influences non-spherical lens to the degree of deflection of light, and the bigger non-spherical lens of diopter is to image strip
Degree of deflection is bigger, is mainly used for correcting coma of the image strip far from key light shaft portion.Default is shaped like the convex of non-spherical lens
The diopter of lens is positive, and the diopter of the concavees lens shaped like non-spherical lens is negative.
Specifically, the first non-spherical lens 211, the second non-spherical lens 212, third non-spherical lens 221 and the 4th are non-
Order, curvature, circular cone coefficient and the diopter of the higher order coefficient of the aspherical equation of spherical lens 222 meet respectively to be wanted as follows
It asks：
The order of the higher order coefficient of the aspherical equation of first non-spherical lens 211 is greater than or equal to preset first threshold value；
The order of the higher order coefficient of the aspherical equation of second non-spherical lens 212 is greater than or equal to default second threshold, due to when non-
When the order of the higher order coefficient of spherical equation is higher, the shape that the curved surface of aspherical equation includes is more complicated, to image strip
The correction ability of light is better, but manufactures also more difficult, and cost is higher, in order to not influence the correction to image strip,
Not to big difficulty is caused, the order of the higher order coefficient of aspherical equation can be determined according to the actual situation.Or
Preset first threshold value and default second threshold can be configured in conjunction with the other configurations situation of refracting set, preset first threshold value
Default second threshold can be equal to, for example, the high level for the non-spherical lens for including in refracting set in embodiments of the present invention
Several orders is greater than or equal to 10, for example, preset first threshold value and default second threshold are 10, alternatively, preset first threshold value
It is 12 for 10 and default second threshold.
Optionally, the curvature in two faces that the first non-spherical lens 211 includes is contrary sign, to reduce incident image strip
Incident angle.For the first non-spherical lens 211, the face of image strip incidence is convex surface, and exit facet is concave surface, for correcting
The angle of paraxial rays.The curvature in two faces of the second non-spherical lens 212 is jack per line, while second non-spherical lens 212
Two faces are convex surface, for correcting spherical aberration and coma, to improve refracting set to the correction ability of image strip.
Optionally, the circular cone coefficient of the first non-spherical lens 211 is not equal to 0, the circular cone coefficient of the second non-spherical lens 212
Equal to 0.
Optionally, the diopter of the first non-spherical lens 211 is negative, and the diopter of the second non-spherical lens 212 is negative.And
And the positive and negative cooperation with the diopter of other four spherical lenses, light beam of the image strip far from primary optical axis is corrected, to reach
Correct the aberration far from key light shaft portion.
Optionally, the order of the higher order coefficient of the aspherical equation of third non-spherical lens 221 is greater than or equal to default the
Three threshold values, the order of the higher order coefficient of the aspherical equation of the 4th non-spherical lens 222 are greater than or equal to default 4th threshold value, by
In when the order of the higher order coefficient of aspherical equation is higher, the shape that the curved surface of aspherical equation includes is more complicated, to image
The correction ability of the light of light beam is better, but manufacture is also more difficult, and cost is higher, rectifys in order to not influence to image strip
Just, also not to big difficulty is caused, the order of the higher order coefficient of aspherical equation can be determined according to the actual situation.
Or default third threshold value and default 4th threshold value can be configured in conjunction with the other configurations situation of refracting set, preset third
Threshold value can be equal to default 4th threshold value, for example, default third threshold value and default 4th threshold value are 10, alternatively, default third
Threshold value is 13 and default 4th threshold value equal 14；
Optionally, the curvature in two faces of third non-spherical lens 221 is jack per line, for third non-spherical lens 221, shadow
As light beam incidence face be concave surface, another side is convex surface, mainly corrects aberration, the song in two faces of the 4th non-spherical lens 222
Rate is contrary sign, while two faces of the 4th non-spherical lens 222 are concave surface, mainly corrects Off-axis aberrations, picture distortion；
Optionally, the circular cone coefficient of third non-spherical lens 221 is equal to 0, the circular cone coefficient etc. of the 4th non-spherical lens 222
In 0；
Optionally, the diopter of third non-spherical lens 221 is positive, and the diopter of the 4th non-spherical lens 222 is positive.And
And the positive and negative cooperation with the diopter of other four spherical lenses, light beam of the image strip far from primary optical axis is corrected, to reach
Correct the aberration far from key light shaft portion.
In addition, preset first threshold value, default second threshold, default third threshold value and default 4th threshold value can be same pre-
If numerical value, or different numerical value.
Due to non-spherical lens compared with spherical lens compared to there is better curvature, aspheric and lens are from lens centre to edge
Continual curvature changes, so that light converges to same point, substantially eliminates spherical aberration caused by spherical lens.So the
One non-spherical lens 211, the second non-spherical lens 212, third non-spherical lens 221 and the 4th non-spherical lens 222 can be big
The big image quality for improving refracting set.Specifically, the first non-spherical lens 211 and the 4th non-spherical lens 222 for reducing
Coma and astigmatism, the second non-spherical lens 212 and third non-spherical lens 221 are for improving big visual field resolution ratio.
In addition, for non-spherical lens, it is stronger to the correction ability of aberration when the thickness of non-spherical lens is thicker.But
It is the thickness for considering to combine selection non-spherical lens in practical applications the problems such as manufacture difficulty and production cost, so that selection
Non-spherical lens have good aberration correction ability, manufacture difficulty will not be caused big, the problems such as production cost is big.Than
Such as, third non-spherical lens 221 with a thickness of T, meet range 6mm<T<12.5mm.
And if most lens all select non-spherical lens in refracting set, refracting set can be greatly increased
Therefore manufacturing cost under the premise of not influencing imaging, part lens can also be selected as spherical lens, to reduce manufacture
Cost.
It optionally, can also be by the first non-spherical lens 211 under the premise of birefringence microscope group imaging effect influences less
It is set as spherical lens.
In the combination of non-spherical lens and spherical lens included by above-mentioned first lens group 210 and the second lens group 220,
The position of non-spherical lens is other aspherical other than the first non-spherical lens 211 can be exchanged with adjacent spherical lens
Lens position can not preferably be exchanged.Above-mentioned spherical lens and non-spherical lens cooperate, and correct image strip, jointly to reach
To the effect for improving imaging effect.
In a specific implementation, third spherical lens 215 and the 4th spherical lens 216 it is glued be an entirety, obtain the
One veneer, the refractive index of third spherical lens 215 are greater than the refractive index of the 4th spherical lens 216, third spherical lens 215
Abbe number of the Abbe number less than the 4th spherical lens 216.Wherein, refractive index is used to indicate the extent of refraction of lens on light line, when
When refractive index is bigger, extent of refraction is bigger, therefore, gets over during refracting set imaging to the light splitting effect of image strip
Greatly.Wherein, Abbe number is for indicating lens medium to the degree of dispersion of light, and Abbe number is lower, and dispersion is more severe, thus refractive index
It is bigger.
And it is optional, the 6th spherical lens 224 and 225 gluing of the 7th spherical lens are an entirety, obtain the second glue
Zoarium, refractive index of the refractive index less than the 7th spherical lens 225 of the 6th spherical lens 224, the Abbe of the 6th spherical lens 224
Number is greater than the Abbe number of the 7th spherical lens 225.
And it is optional, the 8th spherical lens 226 and 227 gluing of the 9th spherical lens are an entirety, obtain third glue
Zoarium, the refractive index of the 8th spherical lens 226 are greater than the refractive index of the 9th spherical lens 227, the Abbe of the 8th spherical lens 226
Abbe number of the number less than the 9th spherical lens 227.
The first veneer in the example above, the second veneer and third veneer, for improving the difference of refracting set
The spherical aberration of spectrum, and the axial chromatic aberration of birefringence microscope group, axial chromatic aberration of hanging down are corrected.It is each included by each veneer
Mirror is made of the material of different Abbe numbers, and there are different dispersions to different spectrum for the material of different Abbe numbers, and by with
Curvature match reaches the function of correction color difference.
And optional, the first non-spherical lens 211, the second non-spherical lens 212, third non-spherical lens 221 and the
Four non-spherical lenses 222 are axisymmetric aspheric surface lens, due to the regular shape of axisymmetric aspheric surface lens, system easy to process
It makes, so when the first non-spherical lens 211, the second non-spherical lens 212, third non-spherical lens 221 and the 4th are aspherical
It is easy to process when mirror 222 is axisymmetric aspheric surface lens, reduce production cost.
And refracting set further includes aperture diaphragm（It is not shown in the figure）, aperture diaphragm is located at the first lens group 210 and
Between two lens groups 220, specifically, between the second non-spherical lens 212 and third non-spherical lens 221.Aperture diaphragm
It is in same optical axis with refracting set, for limiting the light passing amount of refracting set, so that the light passing amount of image strip is limited in most
The case where being conducive to imaging is interior, to improve the effect of imaging.
And reflecting mirror 230 will be for that will pass through the image strip after the first lens group 210 and the correction of the second lens group 220
It is reflected on projection screen.
Optionally, reflecting mirror 230 is non-spherical reflector（The plane of incidence of non-spherical reflector is concave surface）Or free form surface
Reflecting mirror.When reflecting mirror 230 is non-spherical reflector, reflecting mirror 230 is used for the curvature of field and distortion of correcting image light beam.
Using the ultra-short focus projection lens of the embodiment of the present invention, while realizing ultrashort out-of-focus projection, can reach preferable
The purpose of aberration correction, so that image quality is good, B, Fig. 2 B are a kind of ultrashort out-of-focus projection's mirrors exemplified according to implementation referring to fig. 2
The imaging effect schematic diagram of head.As shown in Figure 2 B, cross spider in Fig. 2 B（+）For pre-imaging position, cross（x）For actual imaging position
It sets, then cross and the higher distortion for illustrating imaging of cross spider intersection point registration are more unobvious in Fig. 2 B.By Fig. 2 B it is found that imaging fork
Number higher with cross spider intersection point registration, therefore, the image deformation degree of the camera lens is lower, i.e., aberration is corrected, Neng Gouti
For the imaging effect of high quality.
And since this camera lens has preferable aberration correction ability, analytic ability is promoted, and also can be applied to high parsing
It in the projection lens of degree, for example can be used for parsing the image of 4K resolution ratio, allow projection screen that the figure of more high definition is presented
Picture promotes user experience.
The embodiment of the present invention is provided in ultra-short focus projection lens, and refracting set uses two lens groups, and framework is succinct, eyeglass
Quantity is few, and can reach preferable aberration correction effect by the non-spherical lens and spherical lens of setting limited quantity.Its
In, the first lens group and the second lens group include two non-spherical lenses, and non-spherical lens has well to image strip
Correction ability especially has preferable aberration correction ability to big visual-field beam, improves the resolving power of camera lens, therefore,
On the one hand the setting of above-mentioned non-spherical lens reduces the quantity for the spherical lens for including in camera lens, simplify the structure of camera lens,
And the focal length of entire camera lens is shorter, can be applied in short focus projection and high-res projection.
Embodiment three,
The embodiment of the present invention three provides a kind of laser projection device, can be using above-described embodiment one or embodiment two
Ultra-short focus projection lens.
Specifically, as shown in Figure 3A, Fig. 3 A is a kind of configuration diagram of laser projection device, which can
To be laser movie theatre perhaps laser television or other laser projection instruments, as shown in Figure 3A, including laser light source 30, ray machine
31, ultra-short focus projection lens 32, projection screen 33.Laser light source 30 is that ray machine 31 provides illuminating bundle, and laser light source 30 can be with
It is the mixing light source of monochromatic or two-color laser light source and fluorescent light source composition, is also possible to three color laser light sources.Ray machine 31 is used for
Image strip is formed after being modulated according to image processing signal to illuminating bundle, specifically, ray machine 31 includes light valve and light valve
Lighting system, light valve are a kind of optical modulation devices, can be dmd chip either liquid crystal light valve, in DLP projection, light valve is
Dmd chip.Image strip is reflexed to ultra-short focus projection lens 32 by light valve, and ultra-short focus projection lens 32 are used for image strip school
The imaging of projection screen 33 is projected to after positive amplification.Fig. 3 B is the light path schematic diagram of laser projection device of the embodiment of the present invention, is such as schemed
Shown in 3B, after the camera lens in laser projection device projects light beams upon reflecting mirror 323, light beam is carried out again by reflecting mirror 323 anti-
It is incident upon re-imaging on projection screen 33, by the application of ultra-short focus projection lens, realizes the throwing of ultrashort burnt large scale picture
Shadow.
In one embodiment, the offset of light valve biasing 32 primary optical axis of ultra-short focus projection lens meets：1.2<A/B<
1.5, wherein the A refers to the height of the light valve, and the B refers to primary optical axis to the distance of the upper end of light valve.It should be noted that
Deviate the quantitative response degree of the optical axis of projected picture offset projection camera lens.Specifically, projected picture is inclined when offset is bigger
The distance for moving the optical axis of projection lens is bigger, so can design according to different needs not when designing projection imaging system
With the projection imaging system of offset.
In a specific implementation, in ray machine as shown in Figure 4 A and camera lens light path system schematic diagram, including：Light valve 410 surpasses
Short focus projection lens 400, ultra-short focus projection lens 400 include refracting set 420 and 430, and reflection microscope group 430.And
It further include mobile eyeglass 411 between light valve 410 and ultra-short focus projection lens 400, mobile eyeglass 411 is vibrated with predeterminated frequency, and
In previous moment and current time transmission or reflection image strip, be respectively at different positions so as to previous moment and
The image strip of current time transmission or reflection, which misplaces, to be overlapped.
Light valve 410 is used to modulate the illuminating bundle come in projector from light-source system propagation, so that light valve 410 is according to figure
As processing signal generation image strip, and image strip directive is moved into eyeglass 411.
Optionally, light valve 410 is digital micromirror elements（English：Digital Micromirror Device, referred to as：
DMD）, DMD can be 4K resolution ratio or 3K resolution ratio.
Specifically, light valve 410 includes reflection mirror array and control circuit, when light valve 410 is by illumination, control circuit control
The light beam that reflection mirror array reflection source system processed is launched generates image strip.How related light valve 410 specifically generates image
Light beam is the prior art, not described in detail herein.
Mobile eyeglass 411 is located between light valve 410 and the first lens group 440, and mobile eyeglass 411 is plate glass or reflection
Mirror, can be with transmission or reflection image strip.Mobile eyeglass 411 can vibrate, and mobile eyeglass 411 vibrates so that by mobile eyeglass
The 411 corresponding image strip of adjacent two frames projected image is not exclusively overlapped, and carries out staggered superposition, so that the same pixel of directive
Image strip increases, and then improves the resolution ratio of imaging, and since the vibration of mobile eyeglass 411 is so that adjacent two frames perspective view
As corresponding image strip is slightly misaligned, so that it is excessively more smooth between pixel, so that the fine and smooth sense of imaging is improved,
And then image quality is improved, realize high-resolution image quality, concrete methods of realizing is as follows：
Mobile eyeglass 411 includes driving assembly, and driving assembly can be vibrated according to preset frequency, when driving assembly shakes
When dynamic, driving assembly drives mobile eyeglass 411 to vibrate（B referring to fig. 4, Fig. 4 B are a kind of mobile eyeglasses exemplified according to implementation
411 and its vibrating effect schematic diagram）.In addition, adjacent two frames projected image includes first frame projected image and the second frame perspective view
Picture（First frame projected image and the second frame projected image are obtained by same frame picture breakdown）.When the first frame projected image pair
It is described when the image strip and the corresponding image strip of the second frame projected image answered pass through the mobile eyeglass 411 respectively
Mobile eyeglass 411 is in different location.Specifically, image to be shown has first resolution, image-signal processing system will
Picture breakdown to be shown is at two field pictures, first frame image and the second frame image, wherein first frame image and the second frame image
With second resolution, first resolution is greater than second resolution.When first frame image and the second frame image be expert at resolution ratio and
When column split rate and the inconsistent resolution ratio of DMD row and column, need the row resolution ratio of image to be shown and column split rate first
After being adjusted to the multiple of DMD row resolution ratio, column split rate, then carry out the decomposition of first frame image and the second frame image.After decomposition,
The row, column resolution ratio of first frame image and the second frame image is identical, and with the row, column resolution ratio of DMD at multiple proportion, this times
Number relationship is preferably 1 times.In display, when the corresponding image strip of first frame projected image is by mobile eyeglass 411, move
Index glass piece 411 is in first position；When the corresponding image strip of the second frame projected image is by mobile eyeglass 411, moving lens
Piece 411 is in the second position, first position and second position difference, so that the corresponding image strip of the second frame projected image
The propagation path of propagation path image strip corresponding from the first frame image it is different so that the second frame projected image
Corresponding image strip image strip corresponding with first frame projected image is not exclusively overlapped.For example, two adjacent frame perspective views
As be projected image A and projected image B, first position by move eyeglass 411 towards first direction vibrate generate, the second position by
Mobile eyeglass 411 is vibrated towards second direction to be generated, specifically, when the corresponding image strip of projected image A is by mobile eyeglass
When 411, mobile eyeglass 411 is vibrated towards first direction（For example, the mobile vibration upwards of eyeglass 411）；When projected image B is corresponding
When image strip is by mobile eyeglass 411, mobile eyeglass 411 is vibrated towards second direction（For example, the mobile vibration downwards of eyeglass 411
It is dynamic）, so that the corresponding image strip of projected image B image strip corresponding with projected image A is not exclusively overlapped namely that
This is slightly misaligned, and further, the corresponding image strip of projected image A is introduced into ultra-short focus projection lens 400, then perspective view
As the corresponding image strip of B enters ultra-short focus projection lens 400, due to the time between before and after projected image A and projected image B
Interval is very short, so projected image A and the corresponding projected image of projected image B are almost superimposed and displayed on projection screen.By
It is slightly misaligned in the two, and is overlapped and is projected on projection screen, so that projected image A and projected image B are right on the projection screen
The excessively more smooth and exquisiteness for the pixel between projected image answered, improves the resolution ratio of projected image, to improve throwing
The quality of shadow image.
In addition, it is necessary to explanation is that first frame projected image and the second frame projected image are obtained by same frame picture breakdown,
So can achieve the increased purpose of Pixel Information amount, and then imaging could be improved when projecting to projection screen Overlapping display
Resolution ratio.
In addition, though projected image A and the corresponding projected image of projected image B can divide front and back display on the projection screen,
But the display time difference very little due to projected image A and the corresponding projected image of projected image B on the projection screen, user cannot
Resolved projection image A and the corresponding projected image of projected image B are to be separated display, thus, projected image A and projected image
The corresponding projected image of B, which can be approximated to be, is shown as a width projected image.
It cooperates in addition, the embodiment of the present invention passes through mobile eyeglass 411 with light valve 410, realizes image superposition, Jin Erti
The high resolution ratio of image, the corresponding present invention implement the ability that the ultra-short focus projection lens 400 provided have high-res, with
The high-definition picture that mobile eyeglass 411 is provided with the mutual cooperation of light valve 410 is parsed, and is clearly projected on projection screen.
Projection imaging system provided in an embodiment of the present invention includes light valve 410, mobile eyeglass 411 and ultra-short focus projection lens
400, light valve 410 is used to generate image strip, and by the mobile eyeglass 411 of image strip directive, by mobile eyeglass 411 to image light
Shu Jinhang vibration, changes the position of image strip, to mention so that the image strip of the two field pictures of same frame picture breakdown is not located
In same position, and then the fine and smooth sense of imaging is improved, finally, by the correction of ultra-short focus projection lens 400 and magnified image light beam,
Image strip is projected into projection screen.In embodiments of the present invention, ultra-short focus projection lens 400 are described in embodiment two
It is illustrated for example.
Specifically, ultra-short focus projection lens 400 successively include along the direction of image strip entrance propagation：First lens group
440, the second lens group 430 and reflecting mirror 440.
First lens group 440, the second lens group 430 and reflecting mirror 440 are in same optical axis 401.410 center-biased of light valve
In the optical axis 401 of ultra-short focus projection lens 400.The offset that light valve 410 biases optical axis 401 meets：1.4<A/B<1.5, wherein
A is the height in the face of light valve 410, and B is the distance of the upper end in the face that optical axis 401 arrives light valve 410.
It should be noted that deviating the journey of the optical axis 401 of quantitative response projected picture offset ultra-short focus projection lens 400
Degree.Specifically, the distance that projected picture deviates the optical axis 401 of ultra-short focus projection lens 400 is bigger when offset is bigger.
Specifically, the lens of the first lens group 420 and the second lens group 430 composition, reflection microscope group 440 can be found in embodiment
The description of two contents, details are not described herein.
Optionally, A, projection imaging system further include referring to fig. 4：Total-reflection prism group 450, total-reflection prism group 450 are set
It is placed between light valve 410 and mobile eyeglass 411, total-reflection prism group 450 is used for so that the image strip projected from light valve 410 becomes
For collimated light beam, to improve the smoothness being ultimately imaged.
Optionally, total-reflection prism group 460 include two glued total reflection prisms, respectively the first total reflection prism and
Second total reflection prism 4.The light beam come, first the first total reflection prism of directive are penetrated from light-source system, when light beam directive first is complete
When reflecting prism, light beam is totally reflected, and the light beam directive light valve 410 after being totally reflected, after being totally reflected
When light beam directive light valve 410,410 the reflected beams of light valve simultaneously generate image strip, then by the image strip of generation from light valve 410
Directive total-reflection prism group 450, when image strip is from 410 directive total-reflection prism group 450 of light valve, image strip does not occur entirely
Reflection, but directly by the mobile eyeglass 411 of image strip directive.
Since the first total reflection prism is totally reflected its own light beam of directive, a total reflection rib is used
Mirror can reflect the light on light valve 410, without carrying out multiple reflections by multiple normal mirrors, and then subtract
The usage quantity for having lacked normal mirror greatly reduces the volume of ultra-short focus projection lens 400；In addition, total-reflection prism group
450 to become being parallel to 401 uniform beam of optical axis by light beam therein, it therefore meets the demand of telecentric beam path, due to
So that the image strip that directive light valve 410 generates becomes uniformly, to also improve the quality of projected image.
Since total reflection prism has the function of projecting in parallel to the light injected in it, work as the not parallel of light valve 410
When image strip directive total-reflection prism group 450, total reflection prism 450 projects image strip in parallel, so that image
Light beam becomes uniformly, to improve the smoothness of imaging.
In addition, since total reflection prism can project the light beam injected in it from another direction, so in order to enable shadow
As light beam can may include 4 total reflections by the mobile eyeglass 411 of 460 directive of total-reflection prism group, total-reflection prism group 460
Prism.
In addition, refracting set and reflection microscope group generate positive diopter, wherein the first lens group 420 and the second lens group
The refractor group total length of 430 compositions is L1, and the spacing between refracting set and reflection microscope group 440 is L2, and L1, L2 meet：
0.65<L1/L2<0.7, wherein refractor group length is the total length of the first lens group 420 and the second lens group 430, refraction
Spacing between lens group and reflection microscope group is the second lens group 430 close to one end of reflecting mirror 440 to the length of reflecting mirror 440
Degree.
In addition, the back work distance of ultra-short focus projection lens 400 is from being greater than 36 millimeters, to stay for holding movable eyeglass 411
Enough spaces out.Wherein, back work distance is from for the light valve face of light valve 410 and the first lens of projection lens（First thoroughly
The incidence surface of mirror）The distance between.
In addition, it is necessary to which explanation reserves enough for mobile eyeglass 411 first in specifically design projection imaging system
Space, that is, reserve sufficiently long back work distance from but since the subtended angle of image strip is constant, so longer back work distance
Defection leads to optical axis of the image strip further away from projection lens, so will cause larger aberration, therefore states projection lens in design
It when head, can also consider since long back work distance is from bring aberration, and projection lens correction is set due to long back work distance
From bring aberration.
In addition, distance, that is, camera lens back work distance of light valve face first lens into the first lens group is from BL, refracting telescope
Spacing between group and reflection microscope group 440 is L2, and wherein the range of the ratio of BL/L2 is 0.2-0.35, for further limiting
Back work distance from length to avoid back work distance from too long, cause aberration too big, so as to cause the setup cost of projection lens
Excessively high problem.
Ray machine in the embodiment of the present invention and in the optical system of camera lens, camera lens has preferable aberration correcting capability, figure
As resolution is high, and can reserve back work distance from, can holding movable eyeglass, meet the condition in low resolution DMD
Under, the Projection Display of high-resolution or high-definition image may be implemented.
And the range of the projection ratio of laser projection device provided in an embodiment of the present invention is 0.2-0.3.Projection lens
The range for projecting ratio is 0.2-0.3, to achieve the purpose that ultrashort out-of-focus projection.In another sample instance, projection imaging system
Projection is than being 0.24-0.25.
In addition, the modulation tansfer function of projection lens provided by the invention be greater than 60%, resolution ratio up to 93 lines it is right/millisecond, have
Imitating focal length is -3.38 or -3.47, and offset 142%-150%, projection image is having a size of 80-120.
In addition, laser projection device is unable to satisfy the projection demand of the corresponding image strip of high-resolution 4K image now, and
The ultra-short focus projection lens for including in laser projection device provided in an embodiment of the present invention pass through each spherical lens and aspherical
The cooperation of mirror lens has preferable aberration correction ability, can parse the corresponding image strip of high-resolution image, so that
The image of more high definition can be presented in projection screen, and projected picture quality is high, promote user experience.
And the laser projection device provided in the embodiment of the present invention, including light valve, mobile eyeglass and projection lens.It moves
Index glass piece is overlapped the corresponding image strip of adjacent two frames projected image by vibrating eyeglass not exclusively, due to image strip
Not exclusively overlapping so that the image strip of the same pixel of directive increases, and then improves the resolution ratio of imaging, and due to moving lens
The vibration of piece so that the corresponding image strip of adjacent two frames projected image is slightly misaligned so that between pixel excessively more
Smoothly, to improve the fine and smooth sense of imaging, and then image quality is improved；In addition, projection lens packet provided in an embodiment of the present invention
At least four non-spherical lenses are included, being compared due to non-spherical lens has better calibration capability to aberration with spherical lens, so
Projection lens includes the quantity that can greatly reduce the spherical lens for including after non-spherical lens in projection lens, is not only simplified
The structure of projection lens also substantially increases the resolution ratio of projection lens, is further conducive to realize high-resolution projected image
Projection.
Those skilled in the art will readily occur to other realities of the invention after considering the invention of specification and practice here
Apply scheme.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or suitable
The variation of answering property follows general principle of the invention and including the undocumented common knowledge in the art of the present invention or used
Use technological means.The description and examples are only to be considered as illustrative, and true scope of the invention is referred to by following claim
Out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (15)
1. a kind of ultra-short focus projection lens, which is characterized in that the ultra-short focus projection lens include refracting set and reflection microscope group,
Image strip carries out first time imaging, institute between the refracting set and reflection microscope group after the refracting set
It states reflection microscope group and imaging for the first time reflexed into projection screen forms second and be imaged；
The refracting set includes the first lens group and the second lens group, is all had in first lens group and the second lens group
Two panels non-spherical lens；
Wherein, first lens group includes at least one spherical lens and the first non-spherical lens, the second non-spherical lens, and two
At least provided with a spherical lens between a non-spherical lens；
Second lens group includes at least one spherical lens and third non-spherical lens, the 4th non-spherical lens, and two non-
At least provided with a spherical lens between spherical lens；
The reflection microscope group includes a reflecting mirror, after being placed in second lens group；
The refracting set and reflection microscope group are in same primary optical axis；
The image of second of imaging is 140% ~ 150% relative to the offset of primary optical axis.
2. ultra-short focus projection lens according to claim 1, which is characterized in that the projection ratio of the ultra-short focus projection lens
Between 0.2 ~ 0.3.
3. ultra-short focus projection lens according to claim 1, which is characterized in that the refracting set and reflection microscope group generate
Positive diopter, wherein the total length of the refracting set is L1, and the spacing between the refracting set and reflection microscope group is
L2, L1, L2 meet：0.65<L1/L2<0.7.
4. ultra-short focus projection lens according to claim 1, which is characterized in that the equivalent coke of the ultra-short focus projection lens
It is F2 away from the equivalent focal length for F1, first lens group, the equivalent focal length of second lens group is F3, the reflection microscope group
Equivalent focal length be F4, F1, F2, F3, F4 meet：
5 < | F2/F1 | < 9 ；
7 < | F3/F1 | < 100；
5 < | F4/F1 | < 15。
5. ultra-short focus projection lens according to claim 1, which is characterized in that effective coke of the ultra-short focus projection lens
Away from for -3.3mm ~ -3.5mm.
6. ultra-short focus projection lens according to claim 1, which is characterized in that the reflecting mirror is the aspherical reflection in concave surface
Mirror or free-form surface mirror.
7. ultra-short focus projection lens according to claim 1, which is characterized in that the ultra-short focus projection lens further include hole
Diameter diaphragm, the aperture diaphragm between first lens group and second lens group, the aperture diaphragm with it is described
Refracting set and reflection microscope group are in same primary optical axis, and the aperture diaphragm is used to limit the light passing of the ultra-short focus projection lens
Amount.
8. ultra-short focus projection lens according to claim 1, which is characterized in that
First non-spherical lens is a meniscus, and second non-spherical lens is a biconvex lens, and/or,
The third non-spherical lens is a concave-convex lens, and the 4th non-spherical lens is a biconcave lens.
9. ultra-short focus projection lens according to claim 1, which is characterized in that first lens group is along light beam incidence
Direction successively include first non-spherical lens, the first spherical lens, the second spherical lens, third spherical lens, the 4th
Spherical lens and second non-spherical lens, the diopter of above-mentioned each lens are successively negative, bear, is negative, positive, is positive and negative；
Alternatively, including first spherical lens, first non-spherical lens, second spherical lens, the third ball
Face lens, the 4th spherical lens and second non-spherical lens, the diopter of above-mentioned each lens is successively negative, bears, bearing,
Just, positive and negative.
10. according to claim 1 or ultra-short focus projection lens described in 9, which is characterized in that second lens group is along light beam
Incident direction successively include the third non-spherical lens, the 5th spherical lens, the 6th spherical lens, the 7th spherical lens,
8th spherical lens, the 9th spherical lens, the tenth spherical lens, the 11st spherical lens and the 4th non-spherical lens, on
The diopter for stating lens is successively positive, is positive and negative, is negative, positive, is negative, positive, is negative, positive.
11. ultra-short focus projection lens according to claim 1, which is characterized in that the aspheric of first non-spherical lens
The order of the higher order coefficient of face equation is greater than or equal to preset first threshold value, the aspherical equation of second non-spherical lens
The order of higher order coefficient is greater than or equal to default second threshold；
And the order of the higher order coefficient of the aspherical equation of the third non-spherical lens is greater than or equal to default third threshold
Value, the order of the higher order coefficient of the aspherical equation of the 4th non-spherical lens are greater than or equal to default 4th threshold value.
12. ultra-short focus projection lens according to claim 11, which is characterized in that first preset threshold, second are in advance
If threshold value, third predetermined threshold value, the 4th preset threshold are the integer more than or equal to 10.
13. a kind of laser projection device, including laser light source, for providing illuminating bundle；Ray machine, including light valve are used for basis
Image processing signal forms image strip after being modulated to the illuminating bundle, which is characterized in that further includes that aforesaid right is wanted
Seek 1 to 12 any ultra-short focus projection lens, wherein the image strip is reflexed to the ultrashort burnt throwing by the light valve
Shadow camera lens, the ultra-short focus projection lens are used to be projected to projection screen imaging to after image strip correction amplification.
14. laser projection device according to claim 13, which is characterized in that the light valve biases the ultrashort out-of-focus projection
The offset of camera lens primary optical axis meets：1.2<A/B<1.5, wherein the A refers to the height of the light valve, and the B refers to the optical axis
To the distance of the upper end of the light valve.
15. laser projection device described in 3 or 14 according to claim 1, which is characterized in that in the light valve and the ultrashort coke
It further include mobile eyeglass between projection lens, the mobile eyeglass is vibrated with predeterminated frequency, and in previous moment and current time
Described in transmission or reflection when image strip, it is respectively at different positions, so as to previous moment and current time transmission or instead
The image strip dislocation overlapping penetrated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675937.8A CN106054359B (en) | 2016-08-17 | 2016-08-17 | A kind of ultra-short focus projection lens and laser projection device |
| CN201811211309.XA CN109270682A (en) | 2016-08-17 | 2016-08-17 | A kind of laser projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675937.8A CN106054359B (en) | 2016-08-17 | 2016-08-17 | A kind of ultra-short focus projection lens and laser projection device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811211309.XA Division CN109270682A (en) | 2016-08-17 | 2016-08-17 | A kind of laser projection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106054359A CN106054359A (en) | 2016-10-26 |
| CN106054359B true CN106054359B (en) | 2018-11-23 |
Family
ID=57194648
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610675937.8A Active CN106054359B (en) | 2016-08-17 | 2016-08-17 | A kind of ultra-short focus projection lens and laser projection device |
| CN201811211309.XA Pending CN109270682A (en) | 2016-08-17 | 2016-08-17 | A kind of laser projection device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811211309.XA Pending CN109270682A (en) | 2016-08-17 | 2016-08-17 | A kind of laser projection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106054359B (en) |
Families Citing this family (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106527027A (en) * | 2016-11-17 | 2017-03-22 | 杜辉 | Ultra-short focus projector of rotation lens |
| CN107015425A (en) * | 2017-03-26 | 2017-08-04 | 南京悦微米智能科技有限公司 | A kind of ultrashort out-of-focus projection's instrument lens systems of LED |
| TWI773677B (en) * | 2017-06-30 | 2022-08-11 | 揚明光學股份有限公司 | Wide-angle projection lens |
| CN107144944B (en) * | 2017-07-19 | 2023-04-07 | 中山联合光电科技股份有限公司 | Ultra-short-focus projection optical system |
| CN107784962A (en) * | 2017-12-04 | 2018-03-09 | 贵州晶源动力科技有限公司 | Project digital advertisement cabinet and digital advertisement system |
| CN109946907A (en) * | 2017-12-20 | 2019-06-28 | 中强光电股份有限公司 | Projection device |
| CN110456600B (en) * | 2018-05-08 | 2021-02-02 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection device |
| CN110456491B (en) * | 2018-05-08 | 2020-11-10 | 青岛海信激光显示股份有限公司 | Projection imaging system and laser projection device |
| CN108710194B (en) * | 2018-07-17 | 2024-02-02 | 安徽仁和光电科技有限公司 | Projection lens |
| CN111198472B (en) * | 2019-03-20 | 2021-11-09 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection device |
| CN112305700B (en) * | 2019-07-29 | 2022-09-09 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection device |
| WO2020228595A1 (en) * | 2019-05-14 | 2020-11-19 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection device |
| CN111948886A (en) * | 2019-05-14 | 2020-11-17 | 青岛海信激光显示股份有限公司 | Projection imaging device |
| CN110275382A (en) * | 2019-07-29 | 2019-09-24 | 张羽 | One kind being applied to ultrashort out-of-focus projection's equipment rear-projection reflex reflector lens |
| CN210776142U (en) | 2019-08-30 | 2020-06-16 | 中强光电股份有限公司 | Projection device |
| CN112578610B (en) * | 2019-09-30 | 2022-04-26 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection equipment |
| CN111189620B (en) * | 2020-01-14 | 2021-01-15 | 中国科学院长春光学精密机械与物理研究所 | Wavefront aberration estimation method based on shape characteristics of star spot |
| CN111856720B (en) * | 2020-08-21 | 2024-08-16 | 中山联合光电科技股份有限公司 | Optical system and projection apparatus |
| CN114339170B (en) * | 2020-09-30 | 2023-12-08 | 青岛海信激光显示股份有限公司 | Laser projection device and correction method for projected image thereof |
| CN112305740B (en) * | 2020-11-05 | 2024-11-05 | 沂普光电(天津)有限公司 | Vertical reflective scanning device |
| CN112363299B (en) * | 2020-11-16 | 2024-11-01 | 中山联合光电研究院有限公司 | Ultra-short focal projection optical lens and ultra-short focal projection optical system |
| CN112269298A (en) * | 2020-11-24 | 2021-01-26 | 四川长虹电器股份有限公司 | Curved surface projection optical system |
| CN114545588A (en) * | 2020-11-26 | 2022-05-27 | 青岛海信激光显示股份有限公司 | Projection Lenses and Projection Equipment |
| CN112738491B (en) * | 2020-12-29 | 2022-12-02 | 视田科技（天津）有限公司 | Correction method of projection reflection picture |
| CN112965210B (en) * | 2021-03-22 | 2024-11-05 | 沂普光电(天津)有限公司 | A short-focus lens system |
| JP7168021B2 (en) * | 2021-03-26 | 2022-11-09 | セイコーエプソン株式会社 | projector |
| WO2022268221A1 (en) * | 2021-06-24 | 2022-12-29 | 青岛海信激光显示股份有限公司 | Optical engine and laser projection device |
| CN113963644B (en) * | 2021-10-29 | 2024-07-23 | 青岛海信激光显示股份有限公司 | Laser display device, image display method thereof and readable storage medium |
| CN113985588A (en) * | 2021-10-29 | 2022-01-28 | 歌尔光学科技有限公司 | Projection optical machine |
| CN114924381B (en) * | 2022-04-29 | 2023-11-14 | 歌尔光学科技有限公司 | Projection lens and electronic equipment |
| CN114924457B (en) * | 2022-07-18 | 2022-10-25 | 沂普光电(天津)有限公司 | Ultra-short-focus optical system and projection equipment |
| CN115202005A (en) * | 2022-08-02 | 2022-10-18 | 青岛海信激光显示股份有限公司 | Projection lens and laser projection equipment |
| WO2024136393A1 (en) * | 2022-12-21 | 2024-06-27 | 엘지이노텍 주식회사 | Projection device and electronic device including same |
| CN115793361B (en) * | 2023-02-01 | 2023-05-16 | 沂普光电(天津)有限公司 | Ultra-short-focus projection lens and system |
| CN116107138B (en) * | 2023-04-13 | 2023-08-15 | 沂普光电(天津)有限公司 | Ultra-short focal display system with low offset and small projection ratio |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482689A (en) * | 2009-02-12 | 2009-07-15 | 复旦大学 | Ultra-thin back projection optical system |
| CN103135238A (en) * | 2013-02-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Projection optical system |
| CN104698574A (en) * | 2013-12-05 | 2015-06-10 | 台达电子工业股份有限公司 | Wide-angle projection optical system |
| CN105158884A (en) * | 2015-10-10 | 2015-12-16 | 浙江大学 | Ultra-short-focus projection lens system |
| CN105759543A (en) * | 2014-12-17 | 2016-07-13 | 深圳市亿思达科技集团有限公司 | Projection optical system and projection device |
| CN105785557A (en) * | 2016-03-10 | 2016-07-20 | 浙江水晶光电科技股份有限公司 | Ultra-short-focus projection objective |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050099534A1 (en) * | 2003-10-23 | 2005-05-12 | Aufranc Richard E.Jr. | Display system for an interlaced image frame with a wobbling device |
| JP2005250123A (en) * | 2004-03-04 | 2005-09-15 | Seiko Epson Corp | projector |
| JP2011221341A (en) * | 2010-04-12 | 2011-11-04 | Nikon Corp | Floodlight |
| CN107490844B (en) * | 2012-10-25 | 2020-05-19 | 扬明光学股份有限公司 | Wide-angle projection lens |
| JP6221266B2 (en) * | 2013-03-04 | 2017-11-01 | 株式会社リコー | Projection optical system and image display device |
| CN204405927U (en) * | 2014-12-17 | 2015-06-17 | 深圳市亿思达科技集团有限公司 | Ultrashort out-of-focus projection camera lens |
-
2016
- 2016-08-17 CN CN201610675937.8A patent/CN106054359B/en active Active
- 2016-08-17 CN CN201811211309.XA patent/CN109270682A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482689A (en) * | 2009-02-12 | 2009-07-15 | 复旦大学 | Ultra-thin back projection optical system |
| CN103135238A (en) * | 2013-02-27 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Projection optical system |
| CN104698574A (en) * | 2013-12-05 | 2015-06-10 | 台达电子工业股份有限公司 | Wide-angle projection optical system |
| CN105759543A (en) * | 2014-12-17 | 2016-07-13 | 深圳市亿思达科技集团有限公司 | Projection optical system and projection device |
| CN105158884A (en) * | 2015-10-10 | 2015-12-16 | 浙江大学 | Ultra-short-focus projection lens system |
| CN105785557A (en) * | 2016-03-10 | 2016-07-20 | 浙江水晶光电科技股份有限公司 | Ultra-short-focus projection objective |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106054359A (en) | 2016-10-26 |
| CN109270682A (en) | 2019-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106054359B (en) | A kind of ultra-short focus projection lens and laser projection device | |
| CN106125265B (en) | Projection imaging system | |
| CN110058387B (en) | Double-telecentric projection lens and projection system | |
| US5442484A (en) | Retro-focus type lens and projection-type display apparatus | |
| US8328369B2 (en) | Projecting zoom lens and projection type display apparatus | |
| CN111198472B (en) | Projection lens and laser projection device | |
| JP3753758B2 (en) | LCD video projector | |
| US9581795B2 (en) | Projection-type video display device | |
| US7646541B2 (en) | Backlighting system for a liquid-crystal display screen and corresponding display device | |
| KR101328960B1 (en) | Projector | |
| US6301058B2 (en) | Wide-angle lens | |
| CN113504633B (en) | Projection system | |
| CN114047613B (en) | Optical system and projection device | |
| CN111290101A (en) | Projection imaging system and laser projection equipment | |
| CN101430488A (en) | Projection type image display device | |
| CN110456599B (en) | Projection imaging system and laser projection device | |
| CN110456491B (en) | Projection imaging system and laser projection device | |
| CN110456600B (en) | Projection lens and laser projection device | |
| CN107490846A (en) | A kind of projection lens | |
| US20150301320A1 (en) | Projection lens and projection device thereof | |
| JP2021173923A (en) | Image projection zoom lens and image projection device | |
| CN105759405B (en) | Optical system capable of increasing field angle and projection lens | |
| CN112444932A (en) | Projection lens, focusing method and device of projection lens and projector | |
| CN116859557A (en) | Projection lens and projection device | |
| CN109298584A (en) | Projection lens and projector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200821 Address after: 266555 Qian WAN port road, Huangdao District, Qingdao, Shandong Province, No. 218 Patentee after: Qingdao Hisense Laser Display Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE Co.,Ltd. |