CN208580257U - Doubly telecentric tight shot - Google Patents
Doubly telecentric tight shot Download PDFInfo
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- CN208580257U CN208580257U CN201821043913.1U CN201821043913U CN208580257U CN 208580257 U CN208580257 U CN 208580257U CN 201821043913 U CN201821043913 U CN 201821043913U CN 208580257 U CN208580257 U CN 208580257U
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Abstract
A kind of doubly telecentric tight shot, it from the object side to image side successively include: the first eyeglass group with positive light coke, the second eyeglass group with positive light coke, special-shaped turn back prism, diaphragm, the third eyeglass group with positive light coke and the imaging surface with optical sensor, abnormity turn back prism include three triangular prisms, wherein: the setting of the first and second triangular prism face gluings, third and the first triangular prism are arranged back to gluing.This camera lens has the advantages that telecentricity height, 8M high-resolution, non-stop layer speck.
Description
Technical field
The utility model relates to a kind of technology of field of optical systems, specifically a kind of object space and image space doubly telecentric are fixed
Zoom lens.
Background technique
The image enlargement ratio that telecentric lens obtain in certain object distance range will not change, and it is remote to be broadly divided into object space
The heart and two kinds of image space telecentricity are respectively used to eliminate object space due to the inaccurate bring error in reading and for eliminating image space of focusing
The inaccurate measurement error introduced of focusing.The characteristics of due to the design of its structure, telecentric lens can not be same in object space, the telecentricity of image space
When meet high level, and pixel resolution is lower, and prism therein will lead to light source to be centrally formed speck in imaging surface,
Disturb the image quality of camera lens.
Utility model content
The utility model is in view of the drawbacks of the prior art and insufficient, proposes a kind of doubly telecentric tight shot, has telecentricity
The advantages of height, 8M high-resolution, non-stop layer speck.
The utility model is achieved through the following technical solutions:
The utility model successively includes: the first eyeglass group with positive light coke, has positive light coke from the object side to image side
The second eyeglass group, abnormity turn back prism, diaphragm, the third eyeglass group with positive light coke and with optical sensor at
Image planes.
The first eyeglass group includes: two pieces of lens and one piece of lens with negative power with positive light coke.
When the lens with negative power use non-spherical lens, image quality can be further increased, is subtracted
The small optical system curvature of field.
The second eyeglass group includes: that two pieces of lens or eyeglass with negative power and three pieces have positive light coke
Lens or eyeglass.
The second eyeglass group successively include: from the object side to image side with negative power and cemented surface towards image space glue
It closes eyeglass, the lens with positive light coke, the lens with positive light coke, the lens with negative power and there is positive light focus
The lens or cemented doublet of degree.
In the second eyeglass group, last piece is that simple lens or cemented doublet can further decrease optical system
Spherical aberration.
The abnormity turn back prism include three triangular prisms, in which: the first and second triangular prism face gluings are set
It sets, third and the first triangular prism are arranged back to gluing.
The third eyeglass group includes: that two pieces of lens or eyeglass with positive light coke and two pieces have negative power
Lens or eyeglass.
The third eyeglass group successively includes: the gluing with positive light coke cemented surface towards object space from the object side to image side
Eyeglass, two pieces of lens with negative power and the lens with positive light coke.
Be further provided with after the lens with positive light coke simple lens with negative power or cemented doublet from
And further increase image space telecentricity.
The first eyeglass group, the second eyeglass group, third eyeglass group and camera lens whole focal length ratio absolute value successively
Meet (0.6,0.75), (0.6,0.7), (0.45,0.6), thus color difference on balanced imaging bring axis.
The chief ray of the most surrounding visual field of the camera lens and incident angle α < 10 ° of imaging surface, lesser incidence angle are protected
The bright ratio of surrounding visual field is demonstrate,proved, so that lens imaging picture brightness is more evenly, periphery is without dark angle.
The object space telecentricity degree and image space telecentricity degree of the camera lens meet: θs1< 0.2 and θsi< 0.2, in which: θs1For
It is incident on the chief ray of first piece of lens front surface of camera lens and angle, the θ of optical axissiTo go out from last piece of lens rear surface of camera lens
The angle of the chief ray and optical axis penetrated；The as telecentric lens when angle is less than 1 degree, the object space telecentricity and picture of the utility model
Square telecentricity can satisfy the standard of general telecentric lens and have high telecentricity level.
With the material and focal length of the cemented doublet of negative power and cemented surface towards image space in the second eyeglass group
Ratio meets: 0.15 < | Nd41-Nd42 | < 0.25,0.35 < Vd41/Vd42 < 0.39 and 18 < | (f41*f42)/f4 | < 20,
In: Nd41, Nd42 are respectively refractive index of forward and backward two eyeglass of cemented doublet about d light (587.56nm)；Vd41, Vd42 are
Respectively Abbe number of forward and backward two eyeglass of cemented doublet about d light (587.56nm)；F41 is the focal length of cemented doublet front lens；
F42 is the focal length of cemented doublet rear lens；F4 is the whole focal length of cemented doublet；Cemented doublet passes through the eyeglass of height Abbe number
The chromatism of position of camera lens is effectively reduced in the ratio of material mating focal length.
Face type and material in the third eyeglass group with cemented doublet of the positive light coke cemented surface towards object space is full
Foot:
0 < | Nd91-Nd92 | < 0.15,0.3 < Vd91/Vd92 < 1.5 and 0.1 < | ((Φ s91)/(Rs91)+(Φ s93)/
(Rs93)) | < 0.25, in which: Nd91, Nd92 are respectively refraction of forward and backward two eyeglass of cemented doublet about d light (587.56nm)
Rate；Vd91, Vd92 be respectively Abbe number of forward and backward two eyeglass of cemented doublet about d light (587.56nm)；Φ s91 is gluing
The diameter of lens front surface；Rs91 is the radius of curvature of cemented doublet front surface；Φ s93 is the diameter of cemented doublet rear surface；
Rs93 is the radius of curvature of cemented doublet rear surface；Cemented doublet passes through the cemented doublet group material mating of height Abbe number combinations
The concaveconvex shape of cemented doublet group reduces the spherical aberration and ratio chromatism, of camera lens.
Technical effect
Compared with prior art, the utility model have up to 8M pixel imaging capability, can blur-free imaging, telecentric mirror
Head meets object space, image space doubly telecentric simultaneously, and object space telecentricity and image space telecentricity can satisfy the mark of general telecentric lens
Standard simultaneously has high telecentricity level；By special prism arrangement of turning back, coaxial light source can be substantially reduced and be formed by
The case where bright spot of view-field center, avoids imaging problem brought by the halation of light source generation.
The utility model is for the clear excellent imaging of the energy of the light in 435nm~656nm wave-length coverage, without obvious purple boundary
With dispersion, image quality clearly becomes clear.And the camera lens ensure that the bright ratio of surrounding visual field, so that lens imaging picture brightness is more equal
Even, periphery is without dark angle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2A is that embodiment is turned back prism illumination path schematic diagram using abnormity, and Fig. 2 B is that common prism illumination path is illustrated
Figure；
Fig. 3 is spherical aberration, the curvature of field, distortion figure of the embodiment 1 about d light (587.56nm)；
Fig. 4 is the structural schematic diagram of embodiment 2；
Fig. 5 is spherical aberration, the curvature of field, distortion figure of the embodiment 2 about d light (587.56nm)；
Fig. 6 is the structural schematic diagram of embodiment 3；
Fig. 7 is spherical aberration, the curvature of field, distortion figure of the embodiment 3 about d light (587.56nm)；
Fig. 8 is embodiment 1 to be turned back light source real scene shooting test chart after prism using abnormity；
Fig. 9 is that embodiment 1 uses light source real scene shooting test chart after prism of commonly turning back；
In figure: the first eyeglass group G1, the second eyeglass group G2, abnormity turn back prism LL, diaphragm STP, third eyeglass group G3, at
Image planes IMG, first to the 13rd lens L1~L13, first to third triangular prism LL1~LL3, lens surface S1~S31.
Specific embodiment
Embodiment 1
As shown in Figure 1, the present embodiment is arranged successively from the object side to image side along light incident direction, there is positive light coke
The first eyeglass group G1, the second eyeglass group G2 with positive light coke, abnormity turn back prism LL, diaphragm STP, there is positive light coke
Third eyeglass group G3 and imaging surface IMG.
The first eyeglass group includes: the first lens L1 with positive light coke, the second lens with positive light coke
L2, the aspherical the third lens L3 with negative power.
The second eyeglass group includes: the 4th cemented doublet L4, the tool with negative power and cemented surface towards image space
There is the 5th lens L5 of positive light coke, the 6th lens L6 with positive light coke, the 7th lens L7 with negative power, have
8th lens L8 of positive light coke.
The third eyeglass group includes: the 9th cemented doublet L9 with positive light coke, cemented surface towards object space, have
The tenth lens L10, the 11st lens L11 with negative power, the 12nd lens with positive light coke of negative power
L12。
Specifically, telecentricity tight shot described in the present embodiment, effective focal length 160mm, image distance are 380mm.
The lens construction parameter of the present embodiment is specific as follows:
The camera lens asphericity coefficient of the present embodiment is specific as follows:
First eyeglass group, the second eyeglass group described in the present embodiment, third eyeglass group are exhausted with camera lens whole focal length ratio
0.68,0.65,0.47 is successively met to value.Balanced color difference on bring axis can be imaged in the reasonable focal length proportion of eyeglass group.
The object space telecentricity degree and image space telecentricity degree of telecentricity tight shot described in the present embodiment meet: θs1=0.1,
θsi=0.2, in which: θs1For be incident on first piece of lens front surface of camera lens most surrounding visual field chief ray and optical axis angle,
θsiFor the angle of the chief ray of most surrounding visual field and optical axis that are emitted from the 12nd lens L12 rear surface.
When angle is less than 1 degree, as telecentric lens, the object space telecentricity and image space telecentricity of the present embodiment can expire
The standard of the general telecentric lens of foot simultaneously has high telecentricity level.
The material of 4th cemented doublet described in the present embodiment and focal length meet: | Nd41-Nd42 |=0.20, Vd41/
Vd42=0.382, | (f41*f42)/f4 |=18.5, in which: Nd41, Nd42 are respectively forward and backward two eyeglass of the 4th cemented doublet
Refractive index about d light (587.56nm)；Vd41, Vd42 are to be respectively forward and backward two eyeglass of the 4th cemented doublet about d light
The Abbe number of (587.56nm)；F41 is the focal length of the 4th cemented doublet front lens；F42 is the coke of the 4th cemented doublet rear lens
Away from；F4 is the whole focal length of the 4th cemented doublet；4th cemented doublet is by the lens materials of height Abbe number with complex focus
The chromatism of position of camera lens is effectively reduced in ratio.
The face type of 9th cemented doublet described in the present embodiment and material meet: | Nd91-Nd92 |=0.03, Vd91/
Vd92=0.36, | ((Φ s91)/(Rs91)+(Φ s93)/(Rs93)) |=0.1, in which: Nd91, Nd92 are respectively the 9th glue
Close refractive index of forward and backward two eyeglass of eyeglass about d light (587.56nm)；Vd91, Vd92 are that respectively the 9th cemented doublet is forward and backward
Abbe number of two eyeglasses about d light (587.56nm)；Φ s91 is the diameter of the 9th cemented doublet front surface；Rs91 is the 9th glue
Close the radius of curvature of lens front surface；Φ s93 is the diameter of the 9th cemented doublet rear surface；Rs93 is table after the 9th cemented doublet
The radius of curvature in face；9th cemented doublet passes through the cemented doublet group material mating cemented doublet group of height Abbe number combinations
Concaveconvex shape reduces the spherical aberration and ratio chromatism, of camera lens.
As shown in Fig. 2, the abnormity of the present embodiment is turned back, prism includes three triangular prism LL1~LL3, in which: the first He
The setting of second triangular prism LL1, LL2 face gluing, third triangular prism LL3 and the first triangular prism LL1 are arranged back to gluing.
Using object plane as front, sphere shape light is irradiated into system above prism, and by semi-transparent semi-reflecting lens, the light of half is from back to front
Across the eyeglass group sequentially passed through in front of prism, after being irradiated to object space, it is imaged on imaging surface using telecentric lens；It is another
Half light passes downwardly through prism, and the eyeglass group rental after four secondary reflections across prism rear becomes ghost.Because ghost at
As front-reflection 4 times, energy attenuation is the 1/32 of original light source energy, can be substantially reduced bright spot of view-field center intensity, mitigates ghost
And halation.Compared to the square prism that common two triangular prisms compose, sphere shape light is irradiated into above prism is
System, by semi-transparent semi-reflecting lens, the light of half passes through the eyeglass group sequentially passed through in front of prism from back to front, is irradiated to object space
Afterwards, it is imaged on imaging surface using telecentric lens；The other half light passes downwardly through prism, and rib is passed through after two secondary reflections
The eyeglass group at mirror rear forms ghost.Because only reflecting 2 times before ghost imaging, energy only decays to the 1/ of original light source energy
8, bright spot of view-field center intensity is big, there is apparent ghost and halation.
As shown in Figure 8,9, after prism of being turned back using abnormity, even if (point light source is located at prism in the case where most harsh
The top position 1.5cm), light source real scene shooting test center speck situation can be still obviously improved.It is special to illustrate that the present embodiment passes through
Prism arrangement of turning back, the case where coaxial light source is formed by bright spot of view-field center can be substantially reduced, avoid light source generate halation
Brought imaging problem.
As shown in figure 3, the present embodiment optical distortion DIST is much smaller than 0.1%.It can guarantee lens imaging under any multiplying power
Uniformly, the accuracy and measurability for increasing imaging results, meet the needs of industrial lens.
Embodiment 2
As shown in figure 4, being the present embodiment structural schematic diagram.Compared with Example 1, in the present embodiment the first eyeglass group
Three lens L3 use the spherical lens with negative power, and the 8th eyeglass L8 of the second eyeglass group use with positive light coke and
Eightth cemented doublet of the cemented surface towards image space.
Specifically, telecentricity tight shot described in the present embodiment, effective focal length 275mm, image distance are 380mm.
The lens construction parameter of the present embodiment is specific as follows:
First eyeglass group, the second eyeglass group described in the present embodiment, third eyeglass group are exhausted with camera lens whole focal length ratio
0.63,0.67,0.52 is successively met to value.Balanced color difference on bring axis can be imaged in the reasonable focal length proportion of eyeglass group.
The object space telecentricity degree and image space telecentricity degree of telecentricity tight shot described in the present embodiment meet: θ s1=0.1, θ
Si=0.2, in which: θ s1 be the angle for being incident on the chief ray and optical axis of the most surrounding visual field of first piece of lens front surface of camera lens,
θ si is the chief ray for the most surrounding visual field being emitted from the 12nd lens L12 rear surface and the angle of optical axis.
When angle is less than 1 degree, as telecentric lens, the object space telecentricity and image space telecentricity of the present embodiment can expire
The standard of the general telecentric lens of foot simultaneously has high telecentricity level.
The material of 4th cemented doublet described in the present embodiment and focal length meet: | Nd41-Nd42 |=0.21, Vd41/
Vd42=0.385, | (f41*f42)/f4 |=19.2, in which: Nd41, Nd42 are respectively forward and backward two eyeglass of the 4th cemented doublet
Refractive index about d light (587.56nm)；Vd41, Vd42 are to be respectively forward and backward two eyeglass of the 4th cemented doublet about d light
The Abbe number of (587.56nm)；F41 is the focal length of the 4th cemented doublet front lens；F42 is the coke of the 4th cemented doublet rear lens
Away from；F4 is the whole focal length of the 4th cemented doublet；4th cemented doublet is by the lens materials of height Abbe number with complex focus
The chromatism of position of camera lens is effectively reduced in ratio.
9th cemented doublet face type described in the present embodiment and material meet: | Nd91-Nd92 |=0.11, Vd91/Vd92
=1.38, | ((Φ s91)/(Rs91)+(Φ s93)/(Rs93)) |=0.21, in which: Nd91, Nd92 are respectively the 9th glued mirror
Refractive index of forward and backward two eyeglass of piece about d light (587.56nm)；Vd91, Vd92 are respectively forward and backward two mirror of the 9th cemented doublet
Abbe number of the piece about d light (587.56nm)；Φ s91 is the diameter of the 9th cemented doublet front surface；Rs91 is the 9th glued mirror
The radius of curvature of piece front surface；Φ s93 is the diameter of the 9th cemented doublet rear surface；Rs93 is the 9th cemented doublet rear surface
Radius of curvature；The concave-convex that 9th cemented doublet passes through the cemented doublet group material mating cemented doublet group of height Abbe number combinations
Shape reduces the spherical aberration and ratio chromatism, of camera lens.
As shown in figure 5, the present embodiment optical distortion DIST is much smaller than 0.1%.It can guarantee lens imaging under any multiplying power
Uniformly, the accuracy and measurability for increasing imaging results, meet the needs of industrial lens.
Embodiment 3
As shown in fig. 6, being the present embodiment structural schematic diagram.Compared with Example 1, the tenth in the present embodiment third eyeglass group
Two rears lens L12 are further provided with the 13rd lens L13 with positive light coke, for increasing image space telecentricity.
Specifically, telecentricity tight shot described in the present embodiment, effective focal length 128mm, image distance are 380mm.
The lens construction parameter of the present embodiment is specific as follows:
First eyeglass group, the second eyeglass group described in the present embodiment, third eyeglass group are exhausted with camera lens whole focal length ratio
0.72,0.62,0.55 is successively met to value.Balanced color difference on bring axis can be imaged in the reasonable focal length proportion of eyeglass group.
The object space telecentricity degree and image space telecentricity degree of telecentricity tight shot described in the present embodiment meet: θs1=0.1,
θsi=0.1, in which: θs1For be incident on first piece of lens front surface of camera lens most surrounding visual field chief ray and optical axis angle,
θsiFor the angle of the chief ray of most surrounding visual field and optical axis that are emitted from the 12nd lens L12 rear surface.
When angle is less than 1 degree, as telecentric lens, the object space telecentricity and image space telecentricity of the present embodiment can expire
The standard of the general telecentric lens of foot simultaneously has high telecentricity level.
The material of 4th cemented doublet described in the present embodiment and focal length meet: | Nd41-Nd42 |=0.17, Vd41/
Vd42=0.356, | (f41*f42)/f4 |=18.3, in which: Nd41, Nd42 are respectively forward and backward two eyeglass of the 4th cemented doublet
Refractive index about d light (587.56nm)；Vd41, Vd42 are to be respectively forward and backward two eyeglass of the 4th cemented doublet about d light
The Abbe number of (587.56nm)；F41 is the focal length of the 4th cemented doublet front lens；F42 is the coke of the 4th cemented doublet rear lens
Away from；F4 is the whole focal length of the 4th cemented doublet；4th cemented doublet is by the lens materials of height Abbe number with complex focus
The chromatism of position of camera lens is effectively reduced in ratio.
The face type of 9th cemented doublet described in the present embodiment and material meet: | Nd91-Nd92 |=0.09, Vd91/
Vd92=0.55, | ((Φ s91)/(Rs91)+(Φ s93)/(Rs93)) |=0.16, in which: Nd91, Nd92 are respectively the 9th glue
Close refractive index of forward and backward two eyeglass of eyeglass about d light (587.56nm)；Vd91, Vd92 are that respectively the 9th cemented doublet is forward and backward
Abbe number of two eyeglasses about d light (587.56nm)；Φ s91 is the diameter of the 9th cemented doublet front surface；Rs91 is the 9th glue
Close the radius of curvature of lens front surface；Φ s93 is the diameter of the 9th cemented doublet rear surface；Rs93 is table after the 9th cemented doublet
The radius of curvature in face；9th cemented doublet passes through the recessed of the cemented doublet group material mating cemented doublet group of height Abbe number combinations
Convex form reduces the spherical aberration and ratio chromatism, of camera lens.
As shown in fig. 7, the present embodiment optical distortion DIST is much smaller than 0.1%.It can guarantee lens imaging under any multiplying power
Uniformly, the accuracy and measurability for increasing imaging results, meet the needs of industrial lens.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific
Implementation is limited, and each implementation within its scope is by the constraint of the utility model.
Claims (13)
1. a kind of doubly telecentric tight shot, which is characterized in that from the object side to image side successively include: the first mirror with positive light coke
Piece group, the second eyeglass group with positive light coke, abnormity turn back prism, diaphragm, the third eyeglass group with positive light coke and
Imaging surface with optical sensor；
Abnormity prism of turning back includes three triangular prisms, in which: the setting of the first and second triangular prism face gluings, the
Three and first triangular prism back to gluing be arranged.
2. camera lens according to claim 1, characterized in that the first eyeglass group, which includes: two pieces, has positive light coke
Lens and one piece of lens with negative power.
3. camera lens according to claim 2, characterized in that when the lens with negative power are using aspherical
When mirror, image quality can be further increased, reduces the optical system curvature of field.
4. camera lens according to claim 1, characterized in that the second eyeglass group, which includes: two pieces, has negative power
Lens or eyeglass and three pieces lens or eyeglass with positive light coke.
5. camera lens according to claim 1 or 4, characterized in that the second eyeglass group successively wraps from the object side to image side
Include: with negative power and cemented surface the cemented doublet towards image space, the lens with positive light coke, with the saturating of positive light coke
Mirror, the lens with negative power and lens or cemented doublet with positive light coke.
6. camera lens according to claim 1, characterized in that the third eyeglass group, which includes: two pieces, has positive light coke
Lens or eyeglass and two pieces lens or eyeglass with negative power.
7. camera lens according to claim 1 or 6, characterized in that the third eyeglass group successively wraps from the object side to image side
It includes: towards the cemented doublet of object space, two pieces of lens with negative power and there is positive light focus with positive light coke cemented surface
The lens of degree.
8. camera lens according to claim 7, characterized in that be further provided with tool after the lens with positive light coke
There are simple lens or the cemented doublet of negative power to further increase image space telecentricity.
9. camera lens according to claim 5, characterized in that have negative power and cemented surface in the second eyeglass group
Meet towards the material and focal length ratio of the cemented doublet of image space: 0.15 < | Nd41-Nd42 | < 0.25,0.35 < Vd41/Vd42 <
0.39 and 18 < | (f41*f42)/f4 | < 20, in which: Nd41, Nd42 are respectively forward and backward two eyeglass of cemented doublet about d light
The refractive index of (587.56nm)；Vd41, Vd42 be respectively forward and backward two eyeglass of cemented doublet about d light (587.56nm) Ah
Shellfish number；F41 is the focal length of cemented doublet front lens；F42 is the focal length of cemented doublet rear lens；F4 is the whole burnt of cemented doublet
Away from；Cemented doublet matches the ratio of complex focus by the lens materials of height Abbe number, and the chromatism of position of camera lens is effectively reduced.
10. camera lens according to claim 7, characterized in that have positive light coke cemented surface in the third eyeglass group
Meet towards the face type and material of the cemented doublet of object space: 0 < | Nd91-Nd92 | < 0.15,0.3 < Vd91/Vd92 < 1.5 and 0.1 <
| ((Φ s91)/(Rs91)+(Φ s93)/(Rs93)) | < 0.25, in which: Nd91, Nd92 are respectively forward and backward two mirror of cemented doublet
Refractive index of the piece about the d light that wavelength is 587.56nm；Vd91, Vd92 are to be respectively forward and backward two eyeglass of cemented doublet about wave
The Abbe number of the d light of a length of 587.56nm；Φ s91 is the diameter of cemented doublet front surface；Rs91 is cemented doublet front surface
Radius of curvature；Φ s93 is the diameter of cemented doublet rear surface；Rs93 is the radius of curvature of cemented doublet rear surface；Cemented doublet
By the concaveconvex shape of the cemented doublet group material mating cemented doublet group of height Abbe number combinations, reduce camera lens spherical aberration and
Ratio chromatism,.
11. according to claim 1, any camera lens in 2,3,4 or 6, characterized in that the first eyeglass group and camera lens
The absolute value range of whole focal length ratio is the absolute value model of (0.6~0.75), the second eyeglass group and camera lens whole focal length ratio
Enclosing for the absolute value range of (0.6~0.7), third eyeglass group and camera lens whole focal length ratio is (0.45~0.6), thus balanced
Color difference on bring axis is imaged.
12. according to claim 1, any camera lens in 2,3,4 or 6, characterized in that the most surrounding visual field of the camera lens
Chief ray and imaging surface incident angle α < 10 °.
13. according to claim 1, any camera lens in 2,3,4 or 6, characterized in that the object space telecentricity journey of the camera lens
Degree and image space telecentricity degree meet: θs1< 0.2 and θsi< 0.2, in which: θs1For the master for being incident on first piece of lens front surface of camera lens
The angle of light and optical axis, θsiAngle for the chief ray and optical axis that are emitted from last piece of lens rear surface of camera lens.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108614349A (en) * | 2018-07-03 | 2018-10-02 | 嘉兴中润光学科技有限公司 | Doubly telecentric tight shot |
| WO2020199685A1 (en) * | 2019-04-01 | 2020-10-08 | 广景视睿科技（深圳）有限公司 | Bi-telecentric projection lens and projection system |
| CN115308880A (en) * | 2022-08-30 | 2022-11-08 | 哈尔滨工业大学 | Fixed-focus flat-field telecentric photographic lens |
| CN116027528A (en) * | 2023-03-29 | 2023-04-28 | 深圳市东正光学技术股份有限公司 | Coaxial telecentric optical imaging system, illumination system and imaging device |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108614349A (en) * | 2018-07-03 | 2018-10-02 | 嘉兴中润光学科技有限公司 | Doubly telecentric tight shot |
| CN108614349B (en) * | 2018-07-03 | 2023-12-15 | 嘉兴中润光学科技股份有限公司 | Double telecentric prime lens |
| WO2020199685A1 (en) * | 2019-04-01 | 2020-10-08 | 广景视睿科技（深圳）有限公司 | Bi-telecentric projection lens and projection system |
| CN115308880A (en) * | 2022-08-30 | 2022-11-08 | 哈尔滨工业大学 | Fixed-focus flat-field telecentric photographic lens |
| CN116027528A (en) * | 2023-03-29 | 2023-04-28 | 深圳市东正光学技术股份有限公司 | Coaxial telecentric optical imaging system, illumination system and imaging device |
| CN116027528B (en) * | 2023-03-29 | 2023-06-09 | 深圳市东正光学技术股份有限公司 | Coaxial telecentric optical imaging system, illumination system and imaging device |
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