CN107861316B - Projection lens - Google Patents
Projection lens Download PDFInfo
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- CN107861316B CN107861316B CN201711326578.6A CN201711326578A CN107861316B CN 107861316 B CN107861316 B CN 107861316B CN 201711326578 A CN201711326578 A CN 201711326578A CN 107861316 B CN107861316 B CN 107861316B
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- projection lens
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- 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
- G03B21/142—Adjusting of projection optics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0035—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having three lenses
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- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
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Abstract
This application discloses a kind of projection lens, which extremely sequentially includes: the first lens with positive light coke or negative power at image side by image source side along optical axis；The second lens with positive light coke or negative power；And the third lens with positive light coke, image side surfaces are convex surface.Wherein, total effective focal length f of distance TTL and projection lens of the image side surfaces on optical axis of the image source face of projection lens to the third lens meets TTL/f < 1.4；The effective focal length f3 of the third lens and total effective focal length f of projection lens meet 0 < f3/f < 18.0.
Description
Technical field
This application involves a kind of projection lens, more specifically, this application involves a kind of projection lens including three pieces lens.
Background technique
In recent years, with the continuous progress of science and technology, interactive device gradually rises, and the application range of projection lens is also increasingly
Extensively.Nowadays, chip technology is quickly grown with intelligent algorithm, is projected image to space object using optical projection lens and is received and is somebody's turn to do
Picture signal can calculate the 3-D image with depth information.3-D image with depth information can be further
For a variety of good application exploitations such as bio-identification.
And the conventional projection camera lens for being used to be imaged, usually various aberrations are eliminated by using the mode for increasing lens numbers
And improve resolution ratio.Increasing lens numbers will lead to the optics total length increase of projection lens, can be unfavorable for realizing the small of camera lens
Type.In addition, general big field angle projection lens can also have an amount of distortion big, problems such as image quality difference.
Summary of the invention
This application provides be applicable to portable electronic product, can at least solve or part solve it is in the prior art
The projection lens of at least one above-mentioned disadvantage.
On the one hand, this application provides such a projection lens, and the projection lens is along optical axis by image source side to imaging
Side sequentially includes: the first lens with positive light coke or negative power；The second lens with positive light coke or negative power；
The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the image source face of projection lens is to the third lens
Total effective focal length f of distance TTL and projection lens of the image side surfaces on optical axis can meet TTL/f < 1.4；The third lens
Total effective focal length f of effective focal length f3 and projection lens can meet 0 < f3/f < 18.0.
In one embodiment, the first lens on optical axis center thickness CT1 and the second lens on optical axis
Heart thickness CT2 can meet 1.3 < CT1/CT2 < 1.8.
In one embodiment, total effective coke of the radius of curvature R 6 of the image side surfaces of the third lens and projection lens
- 0.5 < R6/f < 0 can be met away from f.
In one embodiment, spacing distance T12 on optical axis of the first lens and the second lens and the third lens in
Center thickness CT3 on optical axis can meet 0.1 < T12/CT3 < 0.8.
In one embodiment, the image source of the effective half bore DT22 and the second lens of the image side surfaces of the second lens
Effective half bore DT21 of side surface can meet 1.0 < DT22/DT21 < 1.5.
In one embodiment, the image source of the effective half bore DT32 and the third lens of the image side surfaces of the third lens
Effective half bore DT31 of side surface can meet 1.0 < DT32/DT31 < 1.3.
In one embodiment, the maximum angle of half field-of view HFOV of projection lens can meet 10 ° of HFOV <.
In one embodiment, in the light-wave band of 800nm to 1000nm, the light penetration of projection lens can be big
In 85%.
In one embodiment, distance of the image source face of projection lens to the image source side surface of the first lens on optical axis
The image side surfaces in BF and the image source face of projection lens to the third lens distance TTL on optical axis can meet 0 < BF/TTL <
0.5。
On the other hand, this application provides such a projection lens, the projection lens along optical axis by image source side at
Image side sequentially includes: the first lens with positive light coke or negative power；Second with positive light coke or negative power is saturating
Mirror；The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the image source face of projection lens is saturating to third
Total effective focal length f of distance TTL and projection lens of the image side surfaces of mirror on optical axis can meet TTL/f < 1.4；Third is saturating
The effective focal length f3 of the mirror and effective focal length f1 of the first lens can meet -1.0 < f3/f1 < 30.0.
In one embodiment, total effective focal length f of the effective focal length f3 and projection lens of the third lens can meet 0.5
< f3/f < 1.6.
Another aspect, this application provides such a projection lens, the projection lens along optical axis by image source side at
Image side sequentially includes: the first lens with positive light coke or negative power；Second with positive light coke or negative power is saturating
Mirror；The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the first lens are thick in the center on optical axis
1.3 < CT1/CT2 < 1.8 can be met in the center thickness CT2 on optical axis by spending CT1 and the second lens.
Another aspect, this application provides such a projection lens, the projection lens along optical axis by image source side at
Image side sequentially includes: the first lens with positive light coke or negative power；Second with positive light coke or negative power is saturating
Mirror；The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the song of the image side surfaces of the third lens
Total effective focal length f of rate radius R6 and projection lens can meet -0.5 < R6/f < 0.
Another aspect, this application provides such a projection lens, the projection lens along optical axis by image source side at
Image side sequentially includes: the first lens with positive light coke or negative power；Second with positive light coke or negative power is saturating
Mirror；The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the image side surfaces of the second lens has
The effective half bore DT21 for imitating the image source side surface of half bore DT22 and the second lens can meet 1.0 < DT22/DT21 < 1.5.
Another aspect, this application provides such a projection lens, the projection lens along optical axis by image source side at
Image side sequentially includes: the first lens with positive light coke or negative power；Second with positive light coke or negative power is saturating
Mirror；The third lens with positive light coke, image side surfaces can be convex surface.Wherein, the image side surfaces of the third lens has
The effective half bore DT31 for imitating the image source side surface of half bore DT32 and the third lens can meet 1.0 < DT32/DT31 < 1.3.
The application uses multi-disc (for example, three pieces) lens, by each power of lens of reasonable distribution, face type, each
Spacing etc. on axis between the center thickness of mirror and each lens so that above-mentioned projection lens have large-numerical aperture, miniaturization,
At least one beneficial effect such as high image quality.
Detailed description of the invention
In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent
Point will be apparent.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 1；
Fig. 2 shows the distortion curves of the projection lens of embodiment 1；
Fig. 3 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 2；
Fig. 4 shows the distortion curve of the projection lens of embodiment 2；
Fig. 5 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 3；
Fig. 6 shows the distortion curve of the projection lens of embodiment 3；
Fig. 7 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 4；
Fig. 8 shows the distortion curve of the projection lens of embodiment 4；
Fig. 9 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 5；
Figure 10 shows the distortion curve of the projection lens of embodiment 5；
Figure 11 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 6；
Figure 12 shows the distortion curve of the projection lens of embodiment 6；
Figure 13 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 7；
Figure 14 shows the distortion curve of the projection lens of embodiment 7；
Figure 15 shows the structural schematic diagram of the projection lens according to the embodiment of the present application 8；
Figure 16 shows the distortion curve of the projection lens of embodiment 8.
Specific embodiment
Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers
Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way
Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute
Any and all combinations of one or more of list of items.
It should be noted that in the present specification, the first, second equal statement is only used for a feature and another feature differentiation
It comes, without indicating any restrictions to feature.Therefore, discussed below without departing substantially from teachings of the present application
First lens are also known as the second lens, and the second lens are also known as the first lens.
In the accompanying drawings, for ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing
Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing
Shown in spherical surface or aspherical shape.Attached drawing is merely illustrative and and non-critical drawn to scale.
Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position
When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position
When, then it represents that the lens surface is concave surface near axis area is less than.Surface in each lens near image source side is known as image source
Side surface is known as image side surfaces near at the surface of image side in each lens.
It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory
It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more
Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute
When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this
When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative "
It is intended to refer to example or illustration.
Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with
The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words
Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and
It will not be explained with idealization or excessively formal sense, unless clear herein so limit.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The feature of the application, principle and other aspects are described in detail below.
Projection lens according to the application illustrative embodiments may include the lens that such as three pieces have focal power, that is,
First lens, the second lens and the third lens.This three pieces lens is along optical axis by image source side at image side sequential.
In the exemplary embodiment, the first lens have positive light coke or negative power；Second lens have positive light focus
Degree or negative power；The third lens can have positive light coke.
In the exemplary embodiment, at least one of the image source side surface of the first lens and image side surfaces can be convex
Face.In some embodiments, the first lens can be image source side surface and image side surfaces are the biconvex lens on convex surface.
In the exemplary embodiment, at least one of the image source side surface of the third lens and image side surfaces can be convex
Face.Optionally, the image side surfaces of the third lens are convex surface.
In the exemplary embodiment, the projection lens of the application can meet 10 ° of conditional HFOV <, wherein HFOV is
The maximum angle of half field-of view of projection lens.More specifically, HFOV can further meet 9 ° of HFOV <, for example, 7.9 °≤HFOV≤
8.4°.Meet 10 ° of conditional HFOV <, is conducive to the picture of the outer field of view of control shaft, to reduce the aberration of field of view outside axis,
To promote projection quality；Meanwhile being also beneficial to improve field of view and the outer field of view projection depth of focus of axis and imaging on axis
The uniformity of quality.
In the exemplary embodiment, the projection lens of the application can meet 0 < f3/f < 18.0 of conditional, wherein f3
For the effective focal length of the third lens, f is total effective focal length of projection lens.More specifically, f3 and f can further meet 0.50 <
F3/f < 1.60, for example, 0.56≤f3/f≤1.58.Reasonable focal power distribution, the advantageous miniaturization for realizing projection lens and
High projection quality.
In the exemplary embodiment, the projection lens of the application can meet -1.0 < f3/f1 < 30.0 of conditional,
In, f3 is the effective focal length of the third lens, and f1 is the effective focal length of the first lens.More specifically, f3 and f1 can further meet-
0.50 < f3/f1 < 1.50, for example, -0.41≤f3/f1≤1.44.Reasonable focal power distribution, advantageous realization projection lens
Miniaturization and high projection quality.
In the exemplary embodiment, the projection lens of the application is in the light-wave band of about 800nm to about 1000nm, light
Line transmitance is greater than 85%.Such be provided with is conducive to improve the transmitance that near infrared light penetrates projection lens, to obtain
The near-infrared projected image of more high brightness.
In the exemplary embodiment, the projection lens of the application can meet -0.5 < R6/f < 0 of conditional, wherein R6
For the radius of curvature of the image side surfaces of the third lens, f is total effective focal length of projection lens.More specifically, R6 and f are further
- 0.45 < -0.20 < R6/f can be met, for example, -0.39≤R6/f≤- 0.28.Reasonable Arrangement the third lens image side surfaces
Bending direction and bending degree are advantageously implemented the miniaturization and high projection quality of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 1.3 < CT1/CT2 < 1.8 of conditional,
In, CT1 is the first lens in the center thickness on optical axis, and CT2 is the second lens in the center thickness on optical axis.More specifically,
CT1 and CT2 can further meet 1.39≤CT1/CT2≤1.78.Reasonable size distribution, is advantageously implemented the small of projection lens
Type and image source sidelight line telecentricity promote projection efficiency.
In the exemplary embodiment, the projection lens of the application can meet 0.1 < T12/CT3 < 0.8 of conditional,
In, T12 is the spacing distance of the first lens and the second lens on optical axis, and CT3 is the third lens in the center thickness on optical axis.
More specifically, T12 and CT3 can further meet 0.15≤T12/CT3≤0.78.Reasonable size distribution, is advantageously implemented throwing
The miniaturization and image source sidelight line telecentricity of shadow camera lens promote projection efficiency.
In the exemplary embodiment, the projection lens of the application can meet 1.0 < DT22/DT21 < 1.5 of conditional,
In, DT22 is effective half bore of the image side surfaces of the second lens, and DT21 is effectively the half of the image source side surface of the second lens
Bore.More specifically, DT22 and DT21 can further meet 1.01≤DT22/DT21≤1.49.Meet 1.0 < of conditional
DT22/DT21 < 1.5 is advantageously implemented the miniaturization of projection lens.
In the exemplary embodiment, the projection lens of the application can meet 1.0 < DT32/DT31 < 1.3 of conditional,
In, DT32 is effective half bore of the image side surfaces of the third lens, and DT31 is effectively the half of the image source side surface of the third lens
Bore.More specifically, DT32 and DT31 can further meet 1.07≤DT32/DT31≤1.22.Meet 1.0 < of conditional
DT32/DT31 < 1.3 is advantageously implemented the miniaturization of projection lens.
In the exemplary embodiment, the projection lens of the application can meet conditional TTL/f < 1.4, wherein TTL is
Distance on the image source face of projection lens to the axis of the image side surfaces of the third lens, f are total effective focal length of projection lens.More
Body, TTL and f can further meet 0.90 < TTL/f < 1.10, for example, 0.95≤TTL/f≤1.04.Rationally control projection
The ratio of the TTL and f of camera lens are conducive to the miniaturization feature for keeping projection lens.
In the exemplary embodiment, the projection lens of the application can meet 0 < BF/TTL < 0.5 of conditional, wherein BF
For distance on the image source face to the axis of the image source side surface of the first lens of projection lens, TTL is the image source face of projection lens to the
Distance on the axis of the image side surfaces of three lens.More specifically, BF and TTL can further meet 0.10 < BF/TTL < 0.20,
For example, 0.16≤BF/TTL≤0.17.Reasonable size distribution, can effectively shorten the overall length of projection lens, realize miniaturization.
In the exemplary embodiment, above-mentioned projection lens may also include at least one diaphragm, to promote the imaging of camera lens
Quality.Diaphragm can be set as needed to be located at an arbitrary position, for example, diaphragm may be provided at the third lens and between image side.
Optionally, above-mentioned projection lens may also include other well known optical projection elements, for example, prism, field lens etc..It can
Selection of land, above-mentioned projection lens can be used cooperatively jointly with diffraction element.
Compared to common lens, the projection lens main distinction is, the light of general pick-up lens is from object side at image side
Form an image planes；And the light of general projection lens is from image source side at image side, by image planes enlarging projection until perspective plane.One
As the light-inletting quantity of projection lens controlled by object-side numerical aperture and camera lens diaphragm.
Such as three pieces lens can be used according to the projection lens of the above embodiment of the application, it is each by reasonable distribution
The focal power of mirror, face type, each lens center thickness and each lens between axis on spacing etc. so that projection lens have it is big
The beneficial effects such as numerical aperture, miniaturization, high image quality.
In presently filed embodiment, at least one of mirror surface of each lens is aspherical mirror.Non-spherical lens
The characteristics of be: from lens centre to lens perimeter, curvature is consecutive variations.It is constant with having from lens centre to lens perimeter
The spherical lens of curvature is different, and non-spherical lens has more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve picture
The advantages of dissipating aberration.After non-spherical lens, the aberration occurred when imaging can be eliminated as much as possible, so as to improve
Image quality.
However, it will be understood by those of skill in the art that without departing from this application claims technical solution the case where
Under, the lens numbers for constituting projection lens can be changed, to obtain each result and advantage described in this specification.Though for example,
It is so described by taking three pieces lens as an example in embodiments, but the projection lens is not limited to include three pieces lens.If
It needs, which may also include the lens of other quantity.
The specific embodiment for being applicable to the projection lens of above embodiment is further described with reference to the accompanying drawings.
Embodiment 1
Referring to Fig. 1 to Fig. 2 description according to the projection lens of the embodiment of the present application 1.Fig. 1 is shown according to the application reality
Apply the structural schematic diagram of the projection lens of example 1.
As shown in Figure 1, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is convex surface, and image side surfaces S2 is concave surface；Second thoroughly
Mirror E2 has positive light coke, and image source side surface S3 is concave surface, and image side surfaces S4 is convex surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are concave surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 1 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 1
Coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 1
As shown in Table 1, the image source side surface of any one lens and at image side table into the third lens E3 the first lens E1
Face is aspherical.In the present embodiment, the face type x of each non-spherical lens is available but is not limited to following aspherical formula progress
It limits:
Wherein, x be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise；C is
Aspherical paraxial curvature, c=1/R (that is, inverse that paraxial curvature c is upper 1 mean curvature radius R of table)；K be circular cone coefficient (
It has been provided in table 1)；Ai is the correction factor of aspherical i-th-th rank.The following table 2 give can be used for it is each aspherical in embodiment 1
The high-order coefficient A of mirror surface S1-S64、A6、A8、A10、A12、A14And A16。
Table 2
Table 3 provides total effective focal length f of projection lens in embodiment 1, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.38 | 6.32 | 3.44 | 5.35 | 8.4 |
Table 3
Projection lens in embodiment 1 meets:
F3/f=1.58, wherein f3 is the effective focal length of the third lens E3, and f is total effective focal length of projection lens；
F3/f1=0.85, wherein f3 is the effective focal length of the third lens E3, and f1 is the effective focal length of the first lens E1；
R6/f=-0.30, wherein R6 is the radius of curvature of the image side surfaces S6 of the third lens E3, and f is projection lens
Total effective focal length；
CT1/CT2=1.57, wherein CT1 is the first lens E1 in the center thickness on optical axis, and CT2 is the second lens E2
In the center thickness on optical axis；
T12/CT3=0.70, wherein T12 is the spacing distance of the first lens E1 and the second lens E2 on optical axis, CT3
It is the third lens E3 in the center thickness on optical axis；
DT22/DT21=1.16, wherein DT22 is effective half bore of the image side surfaces S4 of the second lens E2, DT21
For effective half bore of the image source side surface S3 of the second lens E2；
DT32/DT31=1.21, wherein DT32 is effective half bore of the image side surfaces S6 of the third lens E3, DT31
For effective half bore of the image source side surface S5 of the third lens E3；
TTL/f=1.04, wherein TTL is distance on the axis of the image side surfaces S6 of image source face OBJ to the third lens E3, f
For total effective focal length of projection lens；
BF/TTL=0.16, wherein BF is distance on the axis of the image source side surface S1 of image source face OBJ to the first lens E1,
TTL is distance on the axis of the image side surfaces S6 of image source face OBJ to the third lens E3.
Fig. 2 shows the distortion curves of the projection lens of embodiment 1, indicate the distortion size in the case of different perspectives
Value.As can be seen from FIG. 2, projection lens given by embodiment 1 can be realized good image quality.
Embodiment 2
Referring to Fig. 3 to Fig. 4 description according to the projection lens of the embodiment of the present application 2.In the present embodiment and following implementation
In example, for brevity, by clipped description similar to Example 1.Fig. 3 shows the throwing according to the embodiment of the present application 2
The structural schematic diagram of shadow camera lens.
As shown in figure 3, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is concave surface, and image side surfaces S2 is convex surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is convex surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are convex surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 4 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 2
Coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 4
As shown in Table 4, in example 2, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 5 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 2,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 |
| S1 | 6.8351E-01 | 5.2701E-01 | -1.0157E+00 | 3.6591E-01 | 1.4452E+00 |
| S2 | 2.9371E-01 | 2.5816E-01 | -5.7110E-02 | -1.5555E+00 | 3.4950E+00 |
| S3 | -5.1990E-02 | -2.1888E+00 | 8.0976E-01 | -5.2364E+00 | -2.2880E-02 |
| S4 | 2.2615E-01 | -7.2416E-01 | 7.8852E-01 | -1.3640E-02 | 1.4131E-02 |
| S5 | -3.4340E-02 | -5.0100E-03 | -3.8100E-03 | 4.7710E-03 | -1.0300E-03 |
| S6 | -7.8150E-02 | 8.9240E-03 | -9.2700E-03 | 1.4960E-03 | -6.8000E-04 |
Table 5
Table 6 provides total effective focal length f of projection lens in embodiment 2, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.60 | 3.97 | -1.74 | 2.40 | 8.0 |
Table 6
Fig. 4 shows the distortion curve of the projection lens of embodiment 2, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 4, projection lens given by embodiment 2 can be realized good image quality.
Embodiment 3
The projection lens according to the embodiment of the present application 3 is described referring to Fig. 5 to Fig. 6.Fig. 5 is shown according to the application
The structural schematic diagram of the projection lens of embodiment 3.
As shown in figure 5, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is convex surface, and image side surfaces S2 is convex surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is convex surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are convex surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 7 shows surface type, radius of curvature, thickness, material and the circular cone of each lens of the projection lens of embodiment 3
Coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 7
As shown in Table 7, in embodiment 3, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 8 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 3,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 8.1772E-01 | 1.9586E-01 | -1.2690E+00 | 4.4820E+00 | -8.6822E+00 | 1.2180E+01 | -7.6760E+00 |
| S2 | 4.8126E-01 | 1.8981E-01 | -1.3418E+00 | 8.9492E+00 | -4.2799E+01 | 1.1981E+02 | -1.5560E+02 |
| S3 | 8.0382E-02 | -3.3871E+00 | 2.0978E+00 | 1.9198E+00 | -9.5609E+01 | 3.4126E+02 | -7.0140E+02 |
| S4 | 2.5353E-01 | -9.7331E-01 | 1.0812E+00 | 1.7342E+00 | -8.0399E+00 | 1.2775E+01 | -7.2752E+00 |
| S5 | -1.5080E-02 | -5.4730E-02 | 9.7142E-02 | -1.1644E-01 | 8.8297E-02 | -3.6150E-02 | 6.0590E-03 |
| S6 | -7.9820E-02 | 6.1200E-03 | -5.8700E-03 | 3.2270E-03 | -4.8200E-03 | 2.8270E-03 | -6.0000E-04 |
Table 8
Table 9 provides total effective focal length f of projection lens in embodiment 3, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.56 | 4.20 | -1.83 | 2.43 | 8.1 |
Table 9
Fig. 6 shows the distortion curve of the projection lens of embodiment 3, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 6, projection lens given by embodiment 3 can be realized good image quality.
Embodiment 4
The projection lens according to the embodiment of the present application 4 is described referring to Fig. 7 to Fig. 8.Fig. 7 is shown according to the application
The structural schematic diagram of the projection lens of embodiment 4.
As shown in fig. 7, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is concave surface, and image side surfaces S2 is convex surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is concave surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are concave surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 10 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 4
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 10
As shown in Table 10, in example 4, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 11 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 4,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
Table 11
Table 12 provides total effective focal length f of projection lens in embodiment 4, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.45 | 1.78 | -1.14 | 2.51 | 8.3 |
Table 12
Fig. 8 shows the distortion curve of the projection lens of embodiment 4, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 8, projection lens given by embodiment 4 can be realized good image quality.
Embodiment 5
The projection lens according to the embodiment of the present application 5 is described referring to Fig. 9 to Figure 10.Fig. 9 is shown according to this Shen
Please embodiment 5 projection lens structural schematic diagram.
As shown in figure 9, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is convex surface, and image side surfaces S2 is convex surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is concave surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are concave surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 13 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 5
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 13
As shown in Table 13, in embodiment 5, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 14 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 5,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 |
| S1 | 4.0492E-02 | -6.2450E-02 | 3.8444E-01 | -2.4728E-01 | 2.3434E-01 |
| S2 | -1.8559E-01 | 3.1456E-01 | -1.0484E-01 | -5.2760E-02 | 4.3063E-01 |
| S3 | 1.4242E-01 | 1.9738E+00 | -7.7372E+00 | 1.4805E+01 | -1.6900E+01 |
| S4 | 7.1021E-01 | 1.3595E+00 | -4.3531E+00 | 1.3515E+01 | -1.9659E+01 |
| S5 | -5.3760E-02 | 5.6370E-03 | -8.5300E-03 | -1.8520E-02 | 3.2693E-02 |
| S6 | 1.9140E-03 | 8.1600E-04 | -9.0000E-04 | 9.1800E-04 | -3.1200E-03 |
Table 14
Table 15 provides total effective focal length f of projection lens in embodiment 5, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.54 | 1.41 | -0.85 | 2.03 | 8.1 |
Table 15
Figure 10 shows the distortion curve of the projection lens of embodiment 5, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 10, projection lens given by embodiment 5 can be realized good image quality.
Embodiment 6
The projection lens according to the embodiment of the present application 6 is described referring to Figure 11 to Figure 12.Figure 11 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 6.
As shown in figure 11, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has positive light coke, and image source side surface S1 is convex surface, and image side surfaces S2 is convex surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is concave surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are convex surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 16 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 6
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 16
As shown in Table 16, in embodiment 6, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 17 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 6,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 |
| S1 | 1.1960E-03 | 2.4802E-01 | -2.2374E-01 | 5.6552E-01 | -9.9505E-01 |
| S2 | -3.4922E-01 | 6.0953E-01 | -8.8702E-01 | 1.3545E+00 | -1.2899E+00 |
| S3 | -1.6735E+00 | 9.3122E+00 | -2.0874E+01 | 2.5616E+01 | 1.0551E+01 |
| S4 | 3.5970E-03 | 4.0683E+00 | -1.3595E+01 | 3.0584E+01 | -3.4256E+01 |
| S5 | -8.7590E-02 | 4.4488E-02 | -1.5820E-02 | 1.6401E-02 | 5.9630E-03 |
| S6 | -1.4270E-02 | -1.0000E-02 | -3.2100E-03 | -4.9600E-03 | 2.1800E-04 |
Table 17
Table 18 provides total effective focal length f of projection lens in embodiment 6, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.61 | 1.46 | -0.86 | 2.03 | 7.9 |
Table 18
Figure 12 shows the distortion curve of the projection lens of embodiment 6, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 12, projection lens given by embodiment 6 can be realized good image quality.
Embodiment 7
The projection lens according to the embodiment of the present application 7 is described referring to Figure 13 to Figure 14.Figure 13 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 7.
As shown in figure 13, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has negative power, and image source side surface S1 is convex surface, and image side surfaces S2 is concave surface；Second thoroughly
Mirror E2 has negative power, and image source side surface S3 is concave surface, and image side surfaces S4 is concave surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are concave surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 19 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 7
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 19
As shown in Table 19, in embodiment 7, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 20 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 7,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 8.0618E-01 | -7.5892E-01 | 1.9544E+00 | -2.8636E+00 | 3.1036E+00 | -1.7204E+01 | 2.7633E+01 |
| S2 | 8.9737E-01 | -2.0510E-02 | 6.1155E+00 | -4.1610E+01 | 3.0605E+02 | -1.0950E+03 | 1.3164E+03 |
| S3 | -1.7417E-01 | -1.4934E-01 | -5.2188E+00 | 4.2122E+01 | -1.9097E+02 | 4.6483E+02 | -4.9756E+02 |
| S4 | 4.6213E-01 | -1.3016E+00 | 2.4156E+00 | -2.5912E+00 | 7.9924E-01 | 6.0891E-01 | -3.4623E-01 |
| S5 | -8.9400E-03 | -1.7000E-04 | 4.5942E-02 | -1.9390E-02 | -1.8840E-02 | 1.0944E-02 | -1.7800E-03 |
| S6 | 1.4138E-02 | 3.5000E-04 | 3.4980E-03 | 2.8280E-03 | -1.3800E-03 | 8.0300E-04 | 4.9700E-04 |
Table 20
Table 21 provides total effective focal length f of projection lens in embodiment 7, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.64 | -161.54 | -4.77 | 2.46 | 7.9 |
Table 21
Figure 14 shows the distortion curve of the projection lens of embodiment 7, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 14, projection lens given by embodiment 7 can be realized good image quality.
Embodiment 8
The projection lens according to the embodiment of the present application 8 is described referring to Figure 15 to Figure 16.Figure 15 is shown according to this
Apply for the structural schematic diagram of the projection lens of embodiment 8.
As shown in figure 15, according to the projection lens of the application illustrative embodiments along optical axis by image source side at image side according to
Sequence includes: the first lens E1, the second lens E2, the third lens E3 and diaphragm STO.
First lens E1 has negative power, and image source side surface S1 is convex surface, and image side surfaces S2 is concave surface；Second thoroughly
Mirror E2 has positive light coke, and image source side surface S3 is convex surface, and image side surfaces S4 is convex surface；The third lens E3 has positive light focus
Degree, image source side surface S5 are concave surface, and image side surfaces S6 is convex surface.In about 800nm into about 1000nm light-wave band, the throwing
The light penetration of shadow camera lens is greater than 85%.Light from image source sequentially passes through each surface S1 to S6 and is ultimately imaged and for example throwing
(not shown) on the perspective plane of shadow screen.
Table 22 shows surface type, radius of curvature, thickness, material and the circle of each lens of the projection lens of embodiment 8
Bore coefficient, wherein radius of curvature and the unit of thickness are millimeter (mm).
Table 22
As shown in Table 22, in embodiment 8, the image source side table of the first lens E1 any one lens into the third lens E3
Face and image side surfaces are aspherical.Table 23 shows the high-order coefficient that can be used for each aspherical mirror in embodiment 8,
In, each aspherical face type can be limited by the formula (1) provided in above-described embodiment 1.
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 7.8499E-01 | -1.0106E+00 | 2.7814E+00 | -5.0633E+00 | 7.5914E+00 | -4.1043E+01 | 6.5116E+01 |
| S2 | 9.7041E-01 | -4.7130E-02 | 5.4882E+00 | -4.6017E+01 | 2.9310E+02 | -1.1282E+03 | 1.4964E+03 |
| S3 | -1.4075E-01 | -5.7600E-02 | -5.0503E+00 | 4.1943E+01 | -1.9223E+02 | 4.6447E+02 | -4.8365E+02 |
| S4 | 4.4525E-01 | -1.3057E+00 | 2.4192E+00 | -2.5876E+00 | 7.9885E-01 | 6.0701E-01 | -3.3933E-01 |
| S5 | -7.4900E-03 | 1.0790E-03 | 4.6866E-02 | -1.8170E-02 | -1.7640E-02 | 1.1582E-02 | -2.0100E-03 |
| S6 | 1.8257E-02 | -5.5000E-04 | 3.5640E-03 | 3.0350E-03 | -1.3500E-03 | 7.2700E-04 | 4.0300E-04 |
Table 23
Table 24 provides total effective focal length f of projection lens in embodiment 8, the effective focal length f1 to f3 of each lens and projection
The maximum angle of half field-of view HFOV of camera lens.
| Parameter | f(mm) | f1(mm) | f2(mm) | f3(mm) | HFOV(°) |
| Numerical value | 3.57 | -6.74 | 30.68 | 2.75 | 8.0 |
Table 24
Figure 16 shows the distortion curve of the projection lens of embodiment 8, indicates the distortion size in the case of different perspectives
Value.As can be seen from FIG. 16, projection lens given by embodiment 8 can be realized good image quality.
To sum up, embodiment 1 to embodiment 8 meets relationship shown in table 25 respectively.
Table 25
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (18)
1. projection lens, which is characterized in that the projection lens is along optical axis by image source side at image side sequentially including:
The first lens with positive light coke or negative power；
The second lens with positive light coke or negative power；
The third lens with positive light coke, image side surfaces are convex surface；
The image source face of the projection lens to the third lens distance TTL of the image side surfaces on the optical axis with it is described
Total effective focal length f of projection lens meets TTL/f < 1.4；
The effective focal length f3 of the third lens and total effective focal length f of the projection lens meet 0 < f3/f < 18.0；And
At least one of mirror surface of first lens, second lens and the third lens is aspherical mirror.
2. projection lens according to claim 1, which is characterized in that first lens are thick in the center on the optical axis
It spends CT1 and second lens and meets 1.3 < CT1/CT2 < 1.8 in the center thickness CT2 on the optical axis.
3. projection lens according to claim 1, which is characterized in that the curvature of the image side surfaces of the third lens half
Total effective focal length f of diameter R6 and the projection lens meets -0.5 < R6/f < 0.
4. projection lens according to claim 1, which is characterized in that first lens and second lens are described
Spacing distance T12 and the third lens on optical axis meet 0.1 < T12/CT3 < in the center thickness CT3 on the optical axis
0.8。
5. projection lens according to claim 1, which is characterized in that effectively the half of the image side surfaces of second lens
Effective half bore DT21 of the image source side surface of bore DT22 and second lens meets 1.0 < DT22/DT21 < 1.5.
6. projection lens according to claim 1, which is characterized in that effectively the half of the image side surfaces of the third lens
Effective half bore DT31 of the image source side surface of bore DT32 and the third lens meets 1.0 < DT32/DT31 < 1.3.
7. projection lens according to any one of claim 1 to 6, which is characterized in that the projection lens maximum half
Field angle HFOV meets 10 ° of HFOV <.
8. projection lens according to any one of claim 1 to 6, which is characterized in that in the light wave of 800nm to 1000nm
In wave band, the light penetration of the projection lens is greater than 85%.
9. projection lens according to any one of claim 1 to 6, which is characterized in that the image source face of the projection lens
To distance BF of the image source side surface on the optical axis of first lens and the image source face of the projection lens to described the
Distance TTL of the image side surfaces of three lens on the optical axis meets 0 < BF/TTL < 0.5.
10. projection lens, which is characterized in that the projection lens is along optical axis by image source side at image side sequentially including:
The first lens with positive light coke or negative power；
The second lens with positive light coke or negative power；
The third lens with positive light coke, image side surfaces are convex surface；
The image source face of the projection lens to the third lens distance TTL of the image side surfaces on the optical axis with it is described
Total effective focal length f of projection lens meets TTL/f < 1.4；
The effective focal length f1 of the effective focal length f3 of the third lens and first lens meets -1.0 < f3/f1 < 30.0；
First lens are in the center thickness CT1 on the optical axis with second lens in the center thickness on the optical axis
CT2 meets 1.3 < CT1/CT2 < 1.8；And
At least one of mirror surface of first lens, second lens and the third lens is aspherical mirror.
11. projection lens according to claim 10, which is characterized in that the image side surfaces of second lens it is effective
Effective half bore DT21 of the image source side surface of half bore DT22 and second lens meets 1.0 < DT22/DT21 < 1.5.
12. projection lens according to claim 10, which is characterized in that the image side surfaces of the third lens it is effective
Effective half bore DT31 of the image source side surface of half bore DT32 and the third lens meets 1.0 < DT32/DT31 < 1.3.
13. projection lens according to claim 10, which is characterized in that the effective focal length f3 of the third lens with it is described
Total effective focal length f of projection lens meets 0.5 < f3/f < 1.6.
14. projection lens according to claim 13, which is characterized in that the curvature of the image side surfaces of the third lens
Total effective focal length f of radius R6 and the projection lens meets -0.5 < R6/f < 0.
15. projection lens according to claim 10, which is characterized in that first lens and second lens are in institute
The spacing distance T12 and the third lens stated on optical axis meets 0.1 < T12/CT3 in the center thickness CT3 on the optical axis
< 0.8.
16. projection lens described in any one of 0 to 15 according to claim 1, which is characterized in that the maximum of the projection lens
Angle of half field-of view HFOV meets 10 ° of HFOV <.
17. projection lens described in any one of 0 to 15 according to claim 1, which is characterized in that in 800nm to 1000nm's
In light-wave band, the light penetration of the projection lens is greater than 85%.
18. projection lens described in any one of 0 to 15 according to claim 1, which is characterized in that the image source of the projection lens
The image source face of distance BF of face to the image source side surface of first lens on the optical axis and the projection lens is to described
Distance TTL of the image side surfaces of the third lens on the optical axis meets 0 < BF/TTL < 0.5.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711326578.6A CN107861316B (en) | 2017-12-13 | 2017-12-13 | Projection lens |
| PCT/CN2018/087036 WO2019114190A1 (en) | 2017-12-13 | 2018-05-16 | Projection lens |
| US16/226,945 US11137573B2 (en) | 2017-12-13 | 2018-12-20 | Projection lens assembly |
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| CN201711326578.6A CN107861316B (en) | 2017-12-13 | 2017-12-13 | Projection lens |
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| CN107861316A CN107861316A (en) | 2018-03-30 |
| CN107861316B true CN107861316B (en) | 2019-10-18 |
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|---|---|---|---|---|
| US11137573B2 (en) | 2017-12-13 | 2021-10-05 | Zhejiang Sunny Optical Co., Ltd. | Projection lens assembly |
| WO2019114190A1 (en) * | 2017-12-13 | 2019-06-20 | 浙江舜宇光学有限公司 | Projection lens |
| CN108427183B (en) * | 2018-05-04 | 2024-06-18 | 浙江舜宇光学有限公司 | Projection lens |
| CN109031593B (en) * | 2018-08-03 | 2021-02-23 | 诚瑞光学(苏州)有限公司 | Projection lens |
| TWI680322B (en) * | 2018-11-27 | 2019-12-21 | 大立光電股份有限公司 | Lens system, projection apparatus, detecting module and electronic device |
| CN109991718B (en) * | 2019-02-22 | 2024-04-12 | 成都九天画芯科技有限公司 | Long-focus projection lens and projector |
| CN110579934A (en) * | 2019-09-11 | 2019-12-17 | 深圳市瞐客科技有限公司 | Novel miniature optical projection system |
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| CN112230381B (en) * | 2020-10-31 | 2022-01-07 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN114420020B (en) * | 2021-12-15 | 2024-08-23 | 惠州星聚宇智能科技有限公司 | Optical projection system, projection module and welcome lamp |
| CN114019660B (en) * | 2021-12-07 | 2022-05-17 | 湖北华鑫光电有限公司 | 3P lens assembly and imaging method |
| CN114705626B (en) * | 2022-06-02 | 2022-09-02 | 苏州高视半导体技术有限公司 | Detection device for detecting surface defects of curved surface and compensation lens group |
| CN116107066B (en) * | 2023-04-14 | 2023-10-20 | 江西联昊光电有限公司 | Optical lens and near-eye display system |
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| CN207516710U (en) * | 2017-12-13 | 2018-06-19 | 浙江舜宇光学有限公司 | Projection lens |
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