CN108873334A - A kind of ultra thin optical amplification mould group and amplification system - Google Patents
A kind of ultra thin optical amplification mould group and amplification system Download PDFInfo
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- CN108873334A CN108873334A CN201810631900.4A CN201810631900A CN108873334A CN 108873334 A CN108873334 A CN 108873334A CN 201810631900 A CN201810631900 A CN 201810631900A CN 108873334 A CN108873334 A CN 108873334A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 273
- 230000003321 amplification Effects 0.000 title claims abstract description 79
- 238000003199 nucleic acid amplification method Methods 0.000 title claims abstract description 79
- 230000010287 polarization Effects 0.000 claims description 343
- 230000005540 biological transmission Effects 0.000 claims description 42
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- 238000009738 saturating Methods 0.000 claims description 7
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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Abstract
The invention discloses a kind of ultra thin optical amplification mould group and amplification system, mould group includes the first phase delay piece set gradually from the object side to image side；The translucent element of part projection part reflection；Fresnel Lenses；Second phase postpones piece；And first reflection type polarizer.It the advantage is that, using ultra-thin Fresnel Lenses, shorten the installation space in each optical element, keep the volume of entire mould group smaller, quality is lighter, and it is more preferable to improve experience of user when using amplification system.
Description
Technical field
The present invention relates to optical technical field more particularly to a kind of ultra thin optical amplification mould groups and amplification system.
Background technique
In the prior art in optical amplifier modular structure, for the image quality and enlargement ratio for meeting optical amplifier mould group,
Multiple optical devices are generally comprised in mould group, since each optical device needs certain installation space, by multiple optics
Often size and volume are bigger for the optical amplifier mould group of device composition.For existing intelligence VR equipment on the market, including
VR intelligent glasses, intelligent helmet and various wear show equipment etc., are to guarantee there is biggish enlargement ratio in use process, it is necessary to
Increase the radius of curvature of convex mirror or increases convex mirror at a distance from display screen, and the improvement result of both schemes has been exactly
The eyeglass of amplification is very thick or eyeglass between screen at a distance from it is excessive, final result be all entire optical amplification system excessively
Heaviness, final complete machine is also inevitable heavy, feels extremely uncomfortable during using wearing, directly influences using effect.
And in order to improve customer experience effect, existing wearable VR intelligent glasses are all guaranteeing that its is higher at image quality
Amount simultaneously, reduces its optical amplifier modular structure with larger field angle as far as possible, to reduce the size of final finished, realizes
Lightweight and comfortableization.Such as patent：Short distance optical amplifier mould group, amplification method and amplification system (publication number：
CN105629472A), optical amplifier mould group disclosed in includes first phase delay piece, imaging len, second phase delay
Piece, reflective polarizer, used imaging len is in the first photofacial close to first phase delay piece in above system
Divide reflective portion transmission, in specification it is found that the imaging len is curved surface on one side, another side is plane, the imaging in the system
Lens are convex mirror or spherical mirror, in order to guarantee that amplification effect must assure that in system there is one or more convex mirrors, thus entirely
Optical amplifier mould packet size is still bigger, to keep entire optical amplification system excessively heavy, and multiple reflections and absorption cause
The loss of light energy is serious, dark images in the visual field.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the present invention to provide a kind of ultra thin optical amplification mould group and
Amplification system reduces the size of entire mould group, while guaranteeing enlargement ratio and image quality to reduce entire amplification system
Size.
One object of the present invention adopts the following technical scheme that realization：
A kind of implementation of ultra thin optical amplification mould group comprising set gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circle from the first linear polarization direction
Polarization direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the light transmission
Element setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is set towards image side
It sets；
Second phase postpones piece, linear for the polarization direction of optical imagery to be switched to second from oval or circular polarization
Polarization direction；And
First reflection type polarizer, have with the consistent transmission direction of the first linear polarization direction, for polarization direction
It is reflected for the optical imagery of the second linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will
The polarization direction of the optical imagery switchs to oval or circular polarization, the translucent element from the second linear polarization direction and is used for
The reflected optical imagery part of first reflection type polarizer is reflexed into the Fresnel Lenses and carries out secondary amplification,
And invert the polarization direction of the optical imagery of reflection, the second phase delay piece is also used to secondary amplified optical picture
The polarization direction of picture switchs to the first linear polarization direction from oval or circular polarization, and first reflection type polarizer is for saturating
Cross the optical imagery that polarization direction is the first linear polarization direction.
Further, mould group further includes the first absorption-type polarizing film；The first absorption-type polarizing film is close to object side, setting
Before the first phase postpones piece, the optical imagery passes sequentially through the first absorption-type polarizing film and first phase is prolonged
Slow piece, the first absorption-type polarizing film have and the consistent transmission direction of the first linear polarization direction, the first absorption-type polarization
Piece is used to absorb the optical imagery from translucent element transmission or the part reflected through the translucent element.
Further, mould group further includes the second reflection type polarizer, and close to object side, setting is polarized in first absorption-type
Before piece, second reflection type polarizer have with the consistent transmission direction of the first linear polarization direction, for by natural light
The polarization direction of optical imagery switch to the first linear polarization direction.
Further, the second reflection type polarizer, the first absorption-type polarizing film, first phase delay piece, described
Optical element is film layer structure, and stickup is combined with each other.
In addition, further, mould group further includes the second absorption-type polarizing film, second absorption-type is polarized close to image side,
It is arranged after first reflection type polarizer, the second absorption-type polarizing film has consistent with the first linear polarization direction
Transmission direction.
Further, the second phase delay piece, first reflection type polarizer and the second absorption-type polarizing film are
Film layer structure, bonding are combined with each other, and are fitted in the smooth surface of the Fresnel Lenses.
Further, the distance between the Fresnel Lenses and the translucent element are 7mm~13mm.
A kind of another implementation of ultra thin optical amplification mould group comprising set gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circle from the first linear polarization direction
Polarization direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the light transmission
Element setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is set towards image side
It sets；
Second phase postpones piece, linear for the polarization direction of optical imagery to be switched to first from oval or circular polarization
Polarization direction；And
First reflection type polarizer, have with the second consistent transmission direction of linear polarization method, for polarization direction
It is reflected for the optical imagery of the first linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will
The polarization direction of the optical imagery switchs to oval or circular polarization, the translucent element from the first linear polarization direction and is used for
The reflected optical imagery part of first reflection type polarizer is reflexed into the Fresnel Lenses and carries out secondary amplification,
And invert the polarization direction of the optical imagery of reflection, the second phase delay piece is also used to secondary amplified optical picture
The polarization direction of picture switchs to the second linear polarization direction from oval or circular polarization, and first reflection type polarizer is for saturating
Cross the optical imagery that polarization direction is the second linear polarization direction.
Another object of the present invention adopts the following technical scheme that realization：
A kind of implementation of ultra thin optical amplification system, system includes screen and ultra thin optical amplifies mould group, described
It includes setting gradually from the object side to image side that ultra thin optical, which amplifies mould group,
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circle from the first linear polarization direction
Polarization direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the light transmission
Element setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is set towards image side
It sets；
Second phase postpones piece, linear for the polarization direction of optical imagery to be switched to second from oval or circular polarization
Polarization direction；And
First reflection type polarizer, have with the consistent transmission direction of the first linear polarization direction, for polarization direction
It is reflected for the optical imagery of the second linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will
The polarization direction of the optical imagery switchs to oval or circular polarization, the translucent element from the second linear polarization direction and is used for
The reflected optical imagery part of first reflection type polarizer is reflexed into the Fresnel Lenses and carries out secondary amplification,
And invert the polarization direction of the optical imagery of reflection, the second phase delay piece is also used to secondary amplified optical picture
The polarization direction of picture switchs to the first linear polarization direction from oval or circular polarization, and first reflection type polarizer is for saturating
Cross the optical imagery that polarization direction is the first linear polarization direction；
The object side is screen side, and the setting of the second reflection type polarizer is prolonged in the screen and the first phase
Between slow piece, second reflection type polarizer have with the consistent transmission direction of the first linear polarization direction, for will be natural
The polarization direction of the optical imagery of light switchs to the first linear polarization direction.
A kind of another implementation of ultra thin optical amplification system, system include screen and ultra thin optical amplification mould
Group, the ultra thin optical amplification mould group includes setting gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circle from the first linear polarization direction
Polarization direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the light transmission
Element setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is set towards image side
It sets；
Second phase postpones piece, linear for the polarization direction of optical imagery to be switched to first from oval or circular polarization
Polarization direction；And
First reflection type polarizer, have with the second consistent transmission direction of linear polarization method, for polarization direction
It is reflected for the optical imagery of the first linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will
The polarization direction of the optical imagery switchs to oval or circular polarization, the translucent element from the first linear polarization direction and is used for
The reflected optical imagery part of first reflection type polarizer is reflexed into the Fresnel Lenses and carries out secondary amplification,
And invert the polarization direction of the optical imagery of reflection, the second phase delay piece is also used to secondary amplified optical picture
The polarization direction of picture switchs to the second linear polarization direction from oval or circular polarization, and first reflection type polarizer is for saturating
Cross the optical imagery that polarization direction is the second linear polarization direction；
The object side is screen side, and the setting of the second reflection type polarizer is prolonged in the screen and the first phase
Between slow piece, second reflection type polarizer have with the consistent transmission direction of the first linear polarization direction, for will be natural
The polarization direction of the optical imagery of light switchs to the first linear polarization direction.
Compared with prior art, the beneficial effects of the present invention are：
(1) Fresnel Lenses is set in optical amplifier mould group, reduces the volume of imaging len, with traditional spherical surface or non-
Spherical lens is compared to can reduce spherical aberration, to reduce the mounting distance between each optical element, guarantee enlargement ratio enough,
While good imaging quality, visual angle broad covered area, the volume of entire optical amplifier mould group is greatly reduced, so that making to apply has this
The volume-diminished of the amplification system of optical amplifier mould group improves user experience convenient for wearing；
(2) simultaneously as the application of Fresnel Lenses, increase the inside of optical amplifier mould group can using space, in phenanthrene
Gap is set between Nie Er lens and the translucent element of partial light permeability part reflection, settable one or more does not change in gap
Corresponding optical element can be added according to actual needs by becoming the polarization state of optical imagery and the optical element of optical path, user, with
It pursues higher image quality or special-effect or gap is smaller, installation space relatively more than needed is being reserved close to image side, is being used for
The optical element of the polarization state that one or more does not change optical imagery and optical path is installed, to meet the different need of user
It asks.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of an embodiment of optical amplifier mould group of the present invention, and which show optical imagerys in mould group
In polarization state variation and optical path；
Fig. 2 is the structural schematic diagram of another embodiment of optical amplifier mould group of the present invention, and which show optical imagerys in mould
Polarization state variation and optical path in group；
Fig. 3 is the structural schematic diagram of an embodiment of optical amplification system of the present invention, and which show optical imagerys in mould group
In polarization state variation and optical path；
Fig. 4 is the structural schematic diagram of another embodiment of optical amplification system of the present invention, and which show optical imagerys in mould
Polarization state variation and optical path in group；
Fig. 5 is the structural schematic diagram for the embodiment that optical amplification system of the present invention is packed into optical element；
Fig. 6 is the structural schematic diagram for another embodiment that optical amplification system of the present invention is packed into optical element；
Fig. 7 is the experiment optical path effect diagram based on optical amplifier mould group embodiment one of the invention；
Fig. 8 is the experiment optical path effect diagram based on optical amplifier mould group embodiment two of the invention；
In figure：
1, first phase postpones piece；2, translucent element；3, Fresnel Lenses；31, gap；4 (4a, 4b), second phase are prolonged
Slow piece；5 (5a, 5b), the first reflection type polarizer；6, the second reflection type polarizer；7, the first absorption-type polarizing film；8 (8a,
8b), the second absorption-type polarizing film；9, object；10, optical element.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
In the description of the present invention, it should be noted that " transverse direction ", " vertical if any term " center " for the noun of locality
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, the narration present invention is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning are necessary
It constructs and operates with specific orientation, with particular orientation, should not be understood as limiting specific protection scope of the invention.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the present description, " several " are meant that two or more, unless otherwise clearly having
The restriction of body.
In the present invention, except as otherwise clear stipulaties and restriction, should make if any term " assembling ", " connected ", " connection " term
Broad sense goes to understand, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to mechanical connect
It connects；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Referring to attached drawing 1 to Fig. 6, the ultra thin optical amplification mould group and amplification system of embodiment according to the present invention will be in the case where connecing
It is set forth in the description come, wherein ultra thin optical amplification mould group solves the problems, such as that modular volume is excessive, so that making to apply has this
The volume-diminished of the amplification system of optical amplifier mould group improves user experience convenient for wearing.
As shown in Figure 1, which show ultra thin optical according to an embodiment of the invention amplify mould group, mould group include from
The first phase that 9 side of object is set gradually to image side postpones piece 1, for by the polarization direction of optical imagery from the first linear polarization side
To switching to oval or circular polarization；The translucent element 2 of part projection part reflection；Fresnel Lenses 3, for amplifying optical picture
Picture, the one side of Fresnel Lenses 3 are serrated face, are arranged towards translucent element 2, have gap 31, Fei Nie between translucent element 2
The another side of your lens 3 is smooth surface, is arranged towards image side；Second phase postpones piece 4a, for by the polarization direction of optical imagery
Switch to the second linear polarization direction from oval or circular polarization；And the first reflection type polarizer 5a, have with it is first linear
The consistent transmission direction in polarization direction, for reflecting the optical imagery that polarization direction is the second linear polarization direction；Its
In, the first linear polarization direction is orthogonal with the second linear polarization direction, and second phase postpones piece 4a and is used for the inclined of optical imagery
Vibration direction switchs to oval or circular polarization from the second linear polarization direction, and translucent element 2 is used for the first reflection type polarizer
The reflected optical imagery part 5a reflexes to Fresnel Lenses 3 and carries out secondary amplification, and by the inclined of the optical imagery of reflection
It shakes direction reversion, second phase delay piece 4a is also used to the polarization direction of secondary amplified optical imagery is inclined from oval or circle
Vibration direction switchs to the first linear polarization direction, and the first reflection type polarizer 5a is used to through polarization direction be the first linear polarization side
To optical imagery.
Wherein, part projection part reflection translucent element 2 be semi-transparent semi-reflecting film, first phase postpone piece 1 be four/
One wave plate, it is quarter-wave plate that second phase, which postpones piece 4a, and the optical path based on above-mentioned mould group is described below：
Optical imagery with the first linear polarization direction injects first phase and postpones piece 1, and polarization direction is by First Line
Property polarization direction switch to oval or circular polarization, then optical imagery passes through translucent element 2, i.e. semi-transparent semi-reflecting film, 50% light
Image is learned by semi-transparent semi-reflecting film, in addition 50% is reflected by semi-transparent semi-reflecting film, then wears by the optical imagery of semi-transparent semi-reflecting film
Fresnel Lenses 3 is crossed, is once amplified, then, piece 4a is postponed by second phase by the optical imagery once amplified,
Polarization direction becomes the second linear polarization direction from oval or circular polarization, since the second linear polarization direction is linear with first
Polarization direction is orthogonal, and the transmission direction and first of the first reflection type polarizer 5a after second phase delay piece 4a is arranged in
Linear polarization direction is consistent, and therefore, polarization direction is that the optical imagery of the second linear polarization direction can not be anti-by first at this time
Emitting polarizing film 5a, and all reflected, second phase delay piece 4a is again passed through, at this point, the polarization direction of optical imagery is again
It is secondary to become oval or circular polarization, Fresnel Lenses 3 is then again passed through, is projected in semi-transparent semi-reflecting film, at this point, polarization side
It is reflected to the optical imagery for oval or circular polarization by semi-transparent semi-reflecting film, spin direction changes, and again passes through Fresnel
Lens 3, carry out secondary amplification, then again pass through second phase delay piece 4a, the polarization direction of optical imagery is converted to first
Linear polarization direction can pass through at this point, the polarization direction of optical imagery is consistent with the transmission direction of the first reflection type polarizer 5a
First reflection type polarizer 5a, into human eye.
As shown in figure 3, optical imagery repeatedly passes through semi-transparent semi-reflecting film due to during optical path, light energy is depleted more
It is secondary, to improve the brightness that the light source of 9 side of object passes through mould group, therefore, the first absorption-type is set in the side close to 9 side of object and is polarized
Piece 7, the setting of the first absorption-type polarizing film 7 is between 9 side of object and first phase delay piece 1, when optical imagery passes through half for the first time
When saturating half anti-film, 50% optical imagery is reflected its spin direction on the contrary, passing through first phase to reflected light image
Postpone piece 1, polarization direction becomes the second linear polarization direction, absorbed by the first absorption-type polarizing film 7, the veiling glare quilt being reflected back
It sponges, to improve image quality；When optical imagery is reflected back semi-transparent semi-reflecting film by the first reflection type polarizer 5a, wherein
50% Fresnel Lenses 3 is reflexed to by semi-transparent semi-reflecting film, remaining 50% passes through semi-transparent semi-reflecting film, then passes through first phase
Postpone piece 1, polarization direction becomes the first linear polarization direction, passes through the first absorption-type polarizing film 7 and the second reflective polarizing
Piece returns to object side (i.e. on screen), increases the brightness of screen, enhance the light of 9 side of object, keeps imaging picture brighter clear.
Since the light source that 9 side of object generates is not necessarily linearly polarized light, as shown in figure 3, mould group further includes the second reflection
Type polarizing film 6 is arranged before the first absorption-type polarizing film 7, the second reflection type polarizer 6 has and First Line close to 9 side of object
The consistent transmission direction in property polarization direction, for the polarization direction of the optical imagery of natural light to be switched to the first linear polarization side
To, make enter amplification mould group optical imagery the first linear polarization direction of polarization direction.
Further, in order to reduce the entire volume for amplifying mould group, the second reflection type polarizer 6, the first absorption-type are polarized
Piece 7, first phase delay piece 1, translucent element 2 are film layer structure, can be independently arranged, also Pasting is combined with each other, in reality
In, the second reflection type polarizer 6, the first absorption-type polarizing film 7, first phase delay piece 1, translucent element 2 compound can glue
It is attached on the screen of 9 side of object, to reduce the volume of entire amplification system.For convenience of mark, in attached drawing 1 into attached drawing 6, Jiang Geguang
The film layer for learning element is provided separately, it should be noted that distance and position is not by attached drawing 1 into attached drawing 6 between each optical element
The distance and position of each optical element limits, and the film layer structure of each optical element can be combined with each other according to actual needs, can also be with
Independently it is provided separately.The preferred embodiment of the present embodiment is, by the second reflection type polarizer 6, the first absorption-type polarizing film 7,
The film layer structure of first phase delay piece 1 and translucent element 2 is compound to be pasted together, and compound technique is the prior art, is not opened up
Open narration.
In addition, the second absorption-type polarizing film 8a, which is arranged, in image side absorbs the anti-of image side using the second absorption-type polarizing film 8a
Light is penetrated, prevents reflected light pleasing to the eye, optical imagery is shown and is interfered, further increase image quality.
Further, in order to reduce amplification mould group volume, second phase postpone piece 4a, the first reflection type polarizer 5a and
Second absorption-type polarizing film 8a is film layer structure, can separate and be independently arranged, can also bond and be combined with each other, be fitted in Fei Nie
In the smooth surface of your lens 3, with the mounting distance reduced between each optical element, the volume for entirely amplifying mould group is made further to contract
It is small.The film layer of each optical element is provided separately in attached drawing 1 into attached drawing 6 for convenience of mark, it should be noted that each optics
The distance and position of distance and position not each optical element by attached drawing 1 into attached drawing 6 is limited between element, the film layer of each optical element
Structure can be combined with each other according to actual needs, can also independently be provided separately.The preferred embodiment of the present embodiment is, by
The film layer structure of two phase delay piece 4a, the first reflection type polarizer 5a and the second absorption-type polarizing film 8a are compound to be pasted onto one
It rises, compound technique is the prior art, is not unfolded to describe.
The transmission direction of first reflection type polarizer 5a and the second absorption-type polarizing film 8a are consistent, the second reflection type polarizer
6 is consistent with the transmission direction of the first absorption-type polarization, meanwhile, the first reflection type polarizer 5a and the second absorption-type polarizing film 8a,
Second reflection type polarizer 6 and the first absorption-type polarization are the first linear polarization direction.
Another embodiment as amplification mould group of the invention comprising set gradually from 9 side of object to image side
First phase postpones piece 1, for by the polarization direction of optical imagery from the first linear polarization direction switch to it is oval or
Circular polarization；
The translucent element 2 of part projection part reflection；
Fresnel Lenses 3, for amplifying optical imagery, the one side of Fresnel Lenses 3 is serrated face, towards translucent element 2
Setting has gap 31 between translucent element 2, and the another side of Fresnel Lenses 3 is smooth surface, is arranged towards image side；
Second phase postpones piece 4b, for the polarization direction of optical imagery to be switched to First Line from oval or circular polarization
Property polarization direction；And
First reflection type polarizer 5b, have with the second consistent transmission direction of linear polarization method, for polarization side
It is reflected to the optical imagery for the first linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and second phase postpones piece 4b and is used for light
The polarization direction for learning image switchs to oval or circular polarization from the first linear polarization direction, and translucent element 2 is used for anti-by first
The reflected optical imagery part emitting polarizing film 5b reflexes to Fresnel Lenses 3 and carries out secondary amplification, and by the light of reflection
Learn image polarization direction reversion, second phase delay piece 4b be also used to by the polarization direction of secondary amplified optical imagery from
Oval or circular polarization switchs to the second linear polarization direction, and the first reflection type polarizer 5b is used to through polarization direction be second
The optical imagery of linear polarization direction.
In above-mentioned amplification mould group, the translucent element 2 of part projection part reflection is semi-transparent semi-reflecting film, and first phase postpones piece
1 is quarter-wave plate, and second phase delay piece 4b is four points that half wave plate and quarter-wave plate are combined with each other
Three wave plates, the optical path based on above-mentioned mould group is described below：
As shown in Fig. 2, the optical imagery with the first linear polarization direction, which injects first phase, postpones piece 1, polarization side
Switch to oval or circular polarization to by the first linear polarization direction, then optical imagery passes through translucent element 2, i.e., semi-transparent semi-reflecting
Film, by semi-transparent semi-reflecting film, in addition 50% is reflected 50% optical imagery by semi-transparent semi-reflecting film, then passes through the light of semi-transparent semi-reflecting film
It learns image and passes through Fresnel Lenses 3, once amplified, then, prolonged by the optical imagery once amplified by second phase
Slow piece 4b, polarization direction become the first linear polarization direction from oval or circular polarization, second phase are arranged at this time and prolongs
The transmission direction of the first reflection type polarizer 5b after slow piece 4b is orthogonal with the first linear polarization direction, is the second linear polarization
Direction, therefore, at this time polarization direction be the first linear polarization direction optical imagery can not by the first reflection type polarizer 5b,
It is all reflected, again passes through second phase delay piece 4b, at this point, the polarization direction of optical imagery becomes oval again or circle is inclined
Shake direction, then again passes through Fresnel Lenses 3, is transmitted in semi-transparent semi-reflecting film, at this point, polarization direction is oval or circular polarization
The optical imagery in direction is reflected by semi-transparent semi-reflecting film, and spin direction changes, and then again passes through Fresnel Lenses 3, carries out two
Secondary amplification, then secondary amplified optical imagery continues across second phase delay piece 4b, and the polarization direction of optical imagery turns
It is changed to the second linear polarization direction, at this point, the transmission direction one of the polarization direction of optical imagery and the first reflection type polarizer 5b
It causes, the first reflection type polarizer 5b can be passed through.
As shown in figure 4, optical imagery repeatedly passes through semi-transparent semi-reflecting film due to during optical path, light energy is depleted more
It is secondary, to improve the brightness that the light source of 9 side of object passes through mould group, therefore, the first absorption-type is set in the side close to 9 side of object and is polarized
Piece 7, the setting of the first absorption-type polarizing film 7 is between 9 side of object and first phase delay piece 1, when optical imagery passes through half for the first time
When saturating half anti-film, 50% optical imagery is reflected its spin direction on the contrary, passing through first phase to reflected light image
Postpone piece 1, polarization direction becomes the second linear polarization direction, absorbed by the first absorption-type polarizing film 7, the veiling glare quilt being reflected back
It sponges, to improve image quality；When optical imagery is reflected back semi-transparent semi-reflecting film by the first reflection type polarizer 5b, wherein
50% Fresnel Lenses 3 is reflexed to by semi-transparent semi-reflecting film, remaining 50% passes through semi-transparent semi-reflecting film, then passes through first phase
Postpone piece 1, polarization direction becomes the first linear polarization direction, passes through the first absorption-type polarizing film 7 and the second reflective polarizing
Piece returns to object side (i.e. on screen), increases the brightness of screen, enhance the light of 9 side of object, keeps imaging picture brighter clear.
Since the light source that 9 side of object generates is not necessarily linearly polarized light, as shown in figure 4, mould group further includes the second reflection
Type polarizing film 6 is arranged before the first absorption-type polarizing film 7, the second reflection type polarizer 6 has and First Line close to 9 side of object
The consistent transmission direction in property polarization direction, for the polarization direction of the optical imagery of natural light to be switched to the first linear polarization side
To, make enter amplification mould group optical imagery the first linear polarization direction of polarization direction.
Further, in order to reduce the entire volume for amplifying mould group, the second reflection type polarizer 6, the first absorption-type are polarized
Piece 7, first phase delay piece 1, translucent element 2 are film layer structure, can be independently arranged, also Pasting is combined with each other, in reality
In, the second reflection type polarizer 6, the first absorption-type polarizing film 7, first phase delay piece 1, translucent element 2 compound can glue
It is attached on the screen of 9 side of object, to reduce the volume of entire amplification system.For convenience of mark, in attached drawing 1 into attached drawing 6, Jiang Geguang
The film layer for learning element is provided separately, it should be noted that distance and position is not by attached drawing 1 into attached drawing 6 between each optical element
The distance and position of each optical element limits, and the film layer structure of each optical element can be combined with each other according to actual needs, can also be with
Independently it is provided separately.The preferred embodiment of the present embodiment is, by the second reflection type polarizer 6, the first absorption-type polarizing film 7,
The film layer structure of first phase delay piece 1 and translucent element 2 is compound to be pasted together, and compound technique is the prior art, is not opened up
Open narration.
In addition, the second absorption-type polarizing film 8b, which is arranged, in image side absorbs the anti-of image side using the second absorption-type polarizing film 8b
Light is penetrated, prevents reflected light pleasing to the eye, optical imagery is shown and is interfered, further increase image quality.
Further, in order to reduce amplification mould group volume, second phase postpone piece 4b, the first reflection type polarizer 5b and
Second absorption-type polarizing film 8b is film layer structure, can separate and be independently arranged, can also bond and be combined with each other, be fitted in Fei Nie
In the smooth surface of your lens 3, with the mounting distance reduced between each optical element, the volume for entirely amplifying mould group is made further to contract
It is small.The film layer of each optical element is provided separately in attached drawing 1 into attached drawing 6 for convenience of mark, it should be noted that each optics
The distance and position of distance and position not each optical element by attached drawing 1 into attached drawing 6 is limited between element, the film layer of each optical element
Structure can be combined with each other according to actual needs, can also independently be provided separately.The preferred embodiment of the present embodiment is, by
The film layer structure of two phase delay piece 4b, the first reflection type polarizer 5b and the second absorption-type polarizing film 8b are compound to be pasted onto one
It rises, compound technique is the prior art, is not unfolded to describe.
As shown in attached drawing 2, attached drawing 4, the transmission of the first above-mentioned reflection type polarizer 5b and the second absorption-type polarizing film 8b
Direction is consistent, and the second reflection type polarizer 6 is consistent with the transmission direction of the first absorption-type polarizing film 7, meanwhile, the second reflection-type is inclined
Shake piece 6 and the first absorption-type polarizing film 7 transmission direction it is consistent with the first linear polarization direction, the first reflection type polarizer 5b with
The transmission direction of second absorption-type polarizing film 8b is consistent with the second linear polarization direction, and the first linear polarization direction and second is linearly
Polarization direction is orthogonal.
Embodiment one is specific experiment parameter and experiment effect based on the preferred embodiment of the present invention, the Fei Nie being provided with
Your design parameter of lens is as shown in Table 1 and Table 2：
The relevant design parameter of 1 embodiment one of table
| Surface number | Surface type | Y radius | Thickness | Material |
| Object plane | Spherical surface | Infinitely | Infinitely | |
| Fresnel Lenses | Fresnel is flat | 29.505415 | 1 | PMMA |
| Diaphragm | Spherical surface | Infinitely | 59.329649 | |
| Image planes | Spherical surface | Infinitely | 0 |
The relevant parameter of the Fresnel Lenses of 2 embodiment one of table
Table 2
In above-mentioned data, Fresnel Lenses is used with a thickness of 1mm, the non-spherical lens of 12 ranks optimization, placing direction
Light is met for serrated face, material is selected as PMMA, diameter 50mm, and lighter weight mitigates the quality of entire amplification mould group.Attached drawing 7
In, object plane is the face B, is successively compounded with the second reflection type polarizer 6, the first absorption-type polarizing film 7, first phase delay piece thereon
1, translucent element 2, translucent element 2 and image face are farthest, and image planes are the face A, on the outside of the practical smooth surface for Fresnel Lenses 3, second
Phase delay chip 4, the first reflection type polarizer 5 and the second absorption-type polarizing film 8 are successively compounded in the smooth surface of Fresnel Lenses 3
On, the second absorption-type polarizing film 8 is farthest with the smooth surface of Fresnel Lenses 3 near image planes, the serrated face of Fresnel Lenses 3 with
The width in the gap 31 between translucent element 2 (i.e. semi-transparent semi-reflecting film) is 7mm~13mm, settable in gap 31 not influence optics
The polarization state of image and the optical element 10 of optical path, as shown in figure 5, meet the different demands of client, in addition, as shown in fig. 6,
Optical element 10 is arranged after the second absorption-type polarizing film 8 width that gap 31 can be reduced.Above-mentioned first phase postpones piece
1 and second phase delay piece 4 be quarter-wave plate, optical imagery is by first phase delay piece 1 and second phase delay
The optical path difference of piece 4 isWherein, n is integer, it should be noted that is processed or produced work
The limitation of skill, polarization light are adjustable there are one by the optical path difference of first phase delay piece 1 and second phase delay piece 4
Range, one of the range are 0.3-0.7 compared with the figure of merit.Quarter-wave plate have it is left-handed and two kinds of dextrorotation, in practical applications,
First phase delay piece 1 is consistent with the second phase delay direction of rotation of piece 4, postpones piece in attached drawing 1 and attached drawing 3 with first phase
1 and second phase delay piece 4 be dextrorotation, the first linear polarization direction is vertical direction, and the second linear polarization direction is level
For direction, it should be noted that first phase postpones piece 1 and second phase postpones the direction of rotation and first of piece 4 linearly
Polarization direction, the second linear polarization direction are not limited by attached drawing 1 and attached drawing 3, can also postpone piece 1 and second using first phase
Phase delay chip 4 is left-handed and/or the first linear polarization direction is level, and the second linear polarization direction is vertical implementation
Mode.
Embodiment two is using the amplification mould group of the aspherical Fresnel Lenses of spherical substrate, parameter setting such as 3 institute of table
Show.
The relevant design parameter of 3 embodiment 3 of table
Radius of curvature is used in above system as -800 spherical substrate, Fresnel Lenses still uses 12 ranks aspherical
Lens.The placement direction of Fresnel Lenses is that serrated face meets light, and material PMMA, diameter 50mm mitigate entire amplification mould group
Quality.In attached drawing 8, object plane is the face C, is successively compounded with the second reflection type polarizer, the first absorption-type polarizing film, first thereon
Phase delay chip, translucent element, translucent element and image face are farthest, and image planes are the face D, outside the practical smooth surface for Fresnel Lenses
Side, second phase delay piece, the first reflection type polarizer and the second absorption-type polarizing film are successively compounded in the light of Fresnel Lenses
On face, the second absorption-type polarizing film is farthest with the smooth surface of Fresnel Lenses near image planes, the serrated face of Fresnel Lenses and thoroughly
The width in the gap 31 between optical element (i.e. semi-transparent semi-reflecting film) is 7mm~13mm, settable in gap 31 not influence optical picture
The polarization state of picture and the optical element 10 of optical path, meet the different demands of client.Above-mentioned first phase delay piece and the second phase
Position delay piece is quarter-wave plate, and optical imagery is by the optical path difference of first phase delay piece and second phase delay pieceWherein, n is integer, it should be noted that by processing or production technology is limited, polarised light
Line by the optical path difference of first phase delay piece and second phase delay piece there are an adjustable range, one of the range
It is 0.3-0.7 compared with the figure of merit.Quarter-wave plate have it is left-handed and two kinds of dextrorotation, in practical applications, first phase postpone piece and
The direction of rotation that second phase postpones piece is consistent, postpones piece in attached drawing 1 and attached drawing 3 with first phase and second phase delay piece is equal
For dextrorotation, the first linear polarization direction is vertical direction, for the second linear polarization direction is horizontal direction, it should be noted that
It is that first phase postpones direction of rotation and the first linear polarization direction, the second linear polarization of piece and second phase delay piece
Direction is not limited by attached drawing 1 and attached drawing 3, can also be left-handed using first phase delay piece and second phase delay piece, and/
Or first linear polarization direction be level, the second linear polarization direction be vertical embodiment.In above-described embodiment two, may be used also
To be 50mm by a diameter, the non-spherical lens that the spherical mirror that radius of curvature is -800mm is 50mm with diameter carries out gluing and reaches
To same amplification effect.
Optical amplifier mould group based on above-mentioned different embodiments, a kind of implementation of ultra thin optical amplification system, such as
Shown in Fig. 3, system include screen and ultra thin optical amplification mould group, ultra thin optical amplification mould group include from 9 side of object to image side according to
Secondary setting
First phase postpones piece 1, for by the polarization direction of optical imagery from the first linear polarization direction switch to it is oval or
Circular polarization；
The translucent element 2 of part projection part reflection；
Fresnel Lenses 3, for amplifying optical imagery, the one side of Fresnel Lenses 3 is serrated face, towards translucent element 2
Setting has gap 31 between translucent element 2, and the another side of Fresnel Lenses 3 is smooth surface, is arranged towards image side；
Second phase postpones piece 4a, for the polarization direction of optical imagery to be switched to the second line from oval or circular polarization
Property polarization direction；And
First reflection type polarizer 5a, have with the consistent transmission direction of the first linear polarization direction, for polarization side
It is reflected to the optical imagery for the second linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and second phase postpones piece 4a and is used for light
The polarization direction for learning image switchs to oval or circular polarization from the second linear polarization direction, and translucent element 2 is used for anti-by first
The reflected optical imagery part emitting polarizing film 5a reflexes to Fresnel Lenses 3 and carries out secondary amplification, and by the light of reflection
Learn image polarization direction reversion, second phase delay piece 4a be also used to by the polarization direction of secondary amplified optical imagery from
Oval or circular polarization switchs to the first linear polarization direction, and the first reflection type polarizer 5a is used to through polarization direction be first
The optical imagery of linear polarization direction；
9 side of object is screen side, and the setting of the second reflection type polarizer 6 postpones between piece 1 in screen and first phase,
Second reflection type polarizer 6 have with the consistent transmission direction of the first linear polarization direction, for by the optical imagery of natural light
Polarization direction switch to the first linear polarization direction.
Above-mentioned amplification system amplifies mould group by setting ultra thin optical, makes the volume-diminished of entire optical amplification system,
Wearing is more comfortable, and user experience is more preferable.Ultra thin optical amplification mould group has been described in detail above, and details are not described herein again.?
In practical application, screen can be the display screen in the wear-type helmet or other intelligent near-eye equipments, including with screen phase
The related electronic devices of connection, related electronic devices generate optical imagery and are displayed on the screen, and screen is as 9 face of object, screen
On optical imagery sent by optical amplifier mould group into human eye, due to the small volume of Fresnel Lenses 3, make entirely to amplify mould
The volume-diminished of group, amplification mould group form ultra-thin eyeglass, and setting is in the wear-type helmet or other intelligent near-eye equipments, with screen
Coaxial or non-coaxial setting, according to experiment it is found that the nearly eye-distance of amplification mould group is from for 12mm~15mm.Other intelligent near-eye equipments
It can also be that intelligent glasses, screen therein can also be Miniature high-definition display screen.Amplification system of the invention can be applied to VR
System is applied to the nearly eye intelligent helmet of VR, the nearly eye intelligent glasses of VR or other headset equipments, has whole equipment biggish
The imaging effect of field angle, eye movement range and high quality, while there is the advantages of overall dimensions are small, light weight, to user with
Preferably experience.
A kind of another implementation of ultra thin optical amplification system, as shown in figure 4, system includes screen and ultra-thin light
Amplification mould group is learned, it includes setting gradually from the object side to image side that ultra thin optical, which amplifies mould group,
First phase postpones piece 1, for by the polarization direction of optical imagery from the first linear polarization direction switch to it is oval or
Circular polarization；
The translucent element 2 of part projection part reflection；
Fresnel Lenses 3, for amplifying optical imagery, the one side of Fresnel Lenses 3 is serrated face, towards translucent element 2
Setting has gap 31 between translucent element 2, and the another side of Fresnel Lenses 3 is smooth surface, is arranged towards image side；
Second phase postpones piece 4b, for the polarization direction of optical imagery to be switched to First Line from oval or circular polarization
Property polarization direction；And
First reflection type polarizer 5b, have with the second consistent transmission direction of linear polarization method, for polarization side
It is reflected to the optical imagery for the first linear polarization direction；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and second phase postpones piece 4b and is used for light
The polarization direction for learning image switchs to oval or circular polarization from the first linear polarization direction, and translucent element 2 is used for anti-by first
The reflected optical imagery part emitting polarizing film 5b reflexes to Fresnel Lenses 3 and carries out secondary amplification, and by the light of reflection
Learn image polarization direction reversion, second phase delay piece 4b be also used to by the polarization direction of secondary amplified optical imagery from
Oval or circular polarization switchs to the second linear polarization direction, and the first reflection type polarizer 5b is used to through polarization direction be second
The optical imagery of linear polarization direction；
Object side is screen side, and the setting of the second reflection type polarizer postpones between piece 1 in screen and first phase, the
Two reflection type polarizers have with the consistent transmission direction of the first linear polarization direction, for by the inclined of the optical imagery of natural light
Vibration direction switchs to the first linear polarization direction.
Above-mentioned amplification system amplifies mould group by setting ultra thin optical, makes the volume-diminished of entire optical amplification system,
Wearing is more comfortable, and user experience is more preferable.Ultra thin optical amplification mould group has been described in detail above, and details are not described herein again.?
In practical application, screen can be the display screen in the wear-type helmet or other intelligent near-eye equipments, including with screen phase
The related electronic devices of connection, related electronic devices generate optical imagery and are simultaneously displayed on the screen, and screen is as object plane, on screen
Optical imagery sent by optical amplifier mould group into human eye, due to the small volume of Fresnel Lenses 3, make entirely to amplify mould group
Volume-diminished, amplification mould group forms ultra-thin eyeglass, and setting is same with screen in the wear-type helmet or other intelligent near-eye equipments
Axis or non-coaxial setting, according to experiment it is found that the nearly eye-distance of amplification mould group is from for 12mm~15mm.Other intelligent near-eye equipments are also
It can be intelligent glasses, screen therein can also be Miniature high-definition display screen.Amplification system of the invention can be applied to VR system
System is applied to the nearly eye intelligent helmet of VR, the nearly eye intelligent glasses of VR or other headset equipments, and whole equipment is made to have biggish view
Rink corner, eye movement range and high quality imaging effect, while there is the advantages of overall dimensions are small, light weight, brought to user
Preferably experience.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (10)
1. a kind of ultra thin optical amplifies mould group, which is characterized in that including what is set gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circular polarization from the first linear polarization direction
Direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the translucent element
Setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is arranged towards image side；
Second phase postpones piece, for the polarization direction of optical imagery to be switched to the second linear polarization from oval or circular polarization
Direction；And
First reflection type polarizer, have with the consistent transmission direction of the first linear polarization direction, for being the to polarization direction
The optical imagery of bilinear polarization direction is reflected；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will be described
The polarization direction of optical imagery switchs to oval or circular polarization from the second linear polarization direction, and the translucent element is used for institute
It states the reflected optical imagery part of the first reflection type polarizer and reflexes to the secondary amplification of the Fresnel Lenses progress, and will
The polarization direction of the optical imagery of reflection inverts, and the second phase delay piece is also used to secondary amplified optical imagery
Polarization direction switchs to the first linear polarization direction from oval or circular polarization, and first reflection type polarizer is used for through inclined
Shake the optical imagery that direction is the first linear polarization direction.
2. ultra thin optical as described in claim 1 amplifies mould group, which is characterized in that further include the first absorption-type polarizing film；Institute
The first absorption-type polarizing film is stated close to object side, before the first phase postpones piece, the optical imagery is passed sequentially through for setting
The first absorption-type polarizing film and first phase postpone piece, and the first absorption-type polarizing film has and the first linear polarization direction one
The transmission direction of cause, the first absorption-type polarizing film for absorb from the translucent element through or through the translucent element it is anti-
The optical imagery for the part penetrated.
3. ultra thin optical as claimed in claim 2 amplifies mould group, which is characterized in that further include the second reflection type polarizer, lean on
Nearly object side, is arranged before the first absorption-type polarizing film, and second reflection type polarizer has and the first linear polarization
The consistent transmission direction in direction, for the polarization direction of the optical imagery of natural light to be switched to the first linear polarization direction.
4. ultra thin optical as claimed in claim 3 amplifies mould group, which is characterized in that the second reflection type polarizer, first absorb
Type polarizing film, first phase delay piece, the translucent element are film layer structure, and stickup is combined with each other.
5. ultra thin optical as described in claim 1 amplifies mould group, which is characterized in that further include the second absorption-type polarizing film, institute
It states the second absorption-type to polarize close to image side, be arranged after first reflection type polarizer, the second absorption-type polarizing film
With with the consistent transmission direction of the first linear polarization direction.
6. ultra thin optical as claimed in claim 5 amplifies mould group, which is characterized in that the second phase delay piece, described the
One reflection type polarizer and the second absorption-type polarizing film are film layer structure, and bonding is combined with each other, and it is saturating to be fitted in the Fresnel
In the smooth surface of mirror.
7. the ultra thin optical as described in claim 1-6 any bar amplifies mould group, which is characterized in that the Fresnel Lenses and institute
Stating the distance between translucent element is 7mm~13mm.
8. a kind of ultra thin optical amplifies mould group, which is characterized in that including what is set gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circular polarization from the first linear polarization direction
Direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the translucent element
Setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is arranged towards image side；
Second phase postpones piece, for the polarization direction of optical imagery to be switched to the first linear polarization from oval or circular polarization
Direction；And
First reflection type polarizer, have with the second consistent transmission direction of linear polarization method, for being the to polarization direction
The optical imagery of one linear polarization direction is reflected；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will be described
The polarization direction of optical imagery switchs to oval or circular polarization from the first linear polarization direction, and the translucent element is used for institute
It states the reflected optical imagery part of the first reflection type polarizer and reflexes to the secondary amplification of the Fresnel Lenses progress, and will
The polarization direction of the optical imagery of reflection inverts, and the second phase delay piece is also used to secondary amplified optical imagery
Polarization direction switchs to the second linear polarization direction from oval or circular polarization, and first reflection type polarizer is used for through inclined
Shake the optical imagery that direction is the second linear polarization direction.
9. a kind of ultra thin optical amplification system, which is characterized in that amplify mould group, the ultra-thin light including screen and ultra thin optical
Learning amplification mould group includes setting gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circular polarization from the first linear polarization direction
Direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the translucent element
Setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is arranged towards image side；
Second phase postpones piece, for the polarization direction of optical imagery to be switched to the second linear polarization from oval or circular polarization
Direction；And
First reflection type polarizer, have with the consistent transmission direction of the first linear polarization direction, for being the to polarization direction
The optical imagery of bilinear polarization direction is reflected；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will be described
The polarization direction of optical imagery switchs to oval or circular polarization from the second linear polarization direction, and the translucent element is used for institute
It states the reflected optical imagery part of the first reflection type polarizer and reflexes to the secondary amplification of the Fresnel Lenses progress, and will
The polarization direction of the optical imagery of reflection inverts, and the second phase delay piece is also used to secondary amplified optical imagery
Polarization direction switchs to the first linear polarization direction from oval or circular polarization, and first reflection type polarizer is used for through inclined
Shake the optical imagery that direction is the first linear polarization direction, and the object side is screen side, and the second reflection type polarizer is set
It sets between the screen and first phase delay piece, second reflection type polarizer has and the first linear polarization side
To consistent transmission direction, for the polarization direction of the optical imagery of natural light to be switched to the first linear polarization direction.
10. a kind of ultra thin optical amplification system, which is characterized in that amplify mould group including screen and ultra thin optical, it is described ultra-thin
Optical amplifier mould group includes setting gradually from the object side to image side
First phase postpones piece, for the polarization direction of optical imagery to be switched to oval or circular polarization from the first linear polarization direction
Direction；
The translucent element of part projection part reflection；
Fresnel Lenses, for amplifying optical imagery, the one side of the Fresnel Lenses is serrated face, towards the translucent element
Setting has gap between the translucent element, and the another side of the Fresnel Lenses is smooth surface, is arranged towards image side；
Second phase postpones piece, for the polarization direction of optical imagery to be switched to the first linear polarization from oval or circular polarization
Direction；And
First reflection type polarizer, have with the second consistent transmission direction of linear polarization method, for being the to polarization direction
The optical imagery of one linear polarization direction is reflected；
Wherein, the first linear polarization direction is orthogonal with the second linear polarization direction, and the second phase delay piece is used for will be described
The polarization direction of optical imagery switchs to oval or circular polarization from the first linear polarization direction, and the translucent element is used for institute
It states the reflected optical imagery part of the first reflection type polarizer and reflexes to the secondary amplification of the Fresnel Lenses progress, and will
The polarization direction of the optical imagery of reflection inverts, and the second phase delay piece is also used to secondary amplified optical imagery
Polarization direction switchs to the second linear polarization direction from oval or circular polarization, and first reflection type polarizer is used for through inclined
Shake the optical imagery that direction is the second linear polarization direction；
The object side is screen side, and the setting of the second reflection type polarizer postpones piece in the screen and the first phase
Between, second reflection type polarizer have with the consistent transmission direction of the first linear polarization direction, for by natural light
The polarization direction of optical imagery switchs to the first linear polarization direction.
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| CN110646942A (en) * | 2019-09-29 | 2020-01-03 | 平行现实（杭州）科技有限公司 | Ultrathin optical amplification module and application thereof |
| CN110927974A (en) * | 2019-12-18 | 2020-03-27 | 业成科技（成都）有限公司 | Optical imaging module and VR electronic equipment |
| CN110955052A (en) * | 2019-12-18 | 2020-04-03 | 业成科技（成都）有限公司 | Optical imaging module and VR electronic equipment |
| CN111103690A (en) * | 2019-12-30 | 2020-05-05 | 上海视欧光电科技有限公司 | Virtual reality display device capable of switching display |
| CN111174180A (en) * | 2020-01-19 | 2020-05-19 | 平行现实（杭州）科技有限公司 | A Large Dynamic Range Beam Steering Device |
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| CN115185086A (en) * | 2022-07-19 | 2022-10-14 | 京东方科技集团股份有限公司 | Display device |
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Application publication date: 20181123 |