CN208239711U - A kind of small field of view angle mirror head - Google Patents
A kind of small field of view angle mirror head Download PDFInfo
- Publication number
- CN208239711U CN208239711U CN201820717022.3U CN201820717022U CN208239711U CN 208239711 U CN208239711 U CN 208239711U CN 201820717022 U CN201820717022 U CN 201820717022U CN 208239711 U CN208239711 U CN 208239711U
- Authority
- CN
- China
- Prior art keywords
- lens
- small field
- focal length
- image
- field angle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000014509 gene expression Effects 0.000 claims description 12
- 239000000571 coke Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 16
- 238000003384 imaging method Methods 0.000 description 6
- 238000012546 transfer Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000005499 meniscus Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 235000012149 noodles Nutrition 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Lenses (AREA)
Abstract
The utility model relates to a kind of small field of view angle mirror heads, the small field of view angle mirror head is from object side, successively by: the first lens with positive light coke have negative power, and object side and image side are the second lens of concave surface, with negative power, and object side is concave surface, and image side is for the third lens on convex surface and with negative power, and object side is concave surface, image side is that the 4th lens on convex surface form.In the utility model, using 4 aspherical glass lens, it is 28.3 that maximum field of view angle, which may be implemented, optics overall length 4.62mm, f-number neglects the bright camera lens in rink corner for F/2.2's, there is good performance for shooting also under darker environment, maximum picture circle is φ 2.8mm, and small structure can be widely used.
Description
Technical Field
The utility model relates to an iris identification system's smart mobile phone, security protection equipment (like entrance guard etc.) to and the technical field who has the used camera lens in place of the demand of highly keeping secret, especially a little angle of field camera lens.
Background
With the improvement of reliability and precision of the unlocking technology, iris recognition is the most convenient and accurate one for current application. Therefore, the resolution of the camera matched with the iris imaging device is required to be higher and higher, and the iris can be clearly imaged. The iris recognition technology has been emerging in smart phones, and becomes a hot tide, and the iris recognition technology is inevitably the key point for the application in various fields such as future security, e-commerce and the like. The camera is required to meet the requirements, the imaging range and the object distance are as small as possible, and the iris can be accurately shot so as to meet the requirement of small-range accurate imaging.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a little angle of vision camera lens.
The technical scheme of the utility model is that: a small field angle lens, comprising, in order from an object side: the lens comprises a first lens with positive focal power, a second lens with negative focal power, a third lens with concave object side and concave image side, a fourth lens with negative focal power, a third lens with concave object side and convex image side, and a fourth lens with negative focal power, wherein the fourth lens with concave object side and convex image side meets the following conditional expression:
2<ct1/ct2<8
0.5<R5/R6<2.0
wherein ct1 is the center distance from the first lens to the second lens, and ct2 is the center distance from the second lens to the third lens.
The small-field-angle lens further satisfies the following relation:
-10<f2/f<-2
-15<(R4+R5)/(R4-R5)<-5
wherein R4 and R5 are the object-side and image-side radii of curvature of the second lens, respectively, and f2 and f are the focal length of the second lens and the focal length of the system, respectively.
The small-field-angle lens further satisfies the following relation:
1.45<ct2/ct3<1.5
wherein ct2 is the central distance from the second lens to the third lens, ct3 is the central distance from the third lens to the fourth lens, f3 is the focal length of the third lens, and f is the effective focal length of the system.
The small-field-angle lens further satisfies the following relation:
0.5<Y1/ImgH<0.85
0.7<Y2/ImgH<0.95
wherein Y1 is the image-side effective clear aperture of the third lens element, ImgH is the total image height, and Y2 is the image-side effective clear aperture of the fourth lens element.
The small-field-angle lens further satisfies the following relation:
-44.7<f3/f<-45
-2<f4/f<2.05
wherein f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f is the effective focal length of the system.
The utility model has the advantages that: the utility model discloses a 4 aspheric surface plastic lenses can realize that the biggest field angle is 28.3, and optics overall length 4.62mm, and the light angle is bright camera lens of little field angle of F/2.2 for the aperture value, shoots also to have fine performance under the environment darker, and the biggest image circle is phi 2.8 mm. The minute structure can be widely used.
Drawings
Fig. 1 is a sectional view of the small field angle lens of the present invention in the optical axis direction;
fig. 2 is a two-dimensional view of a small field angle lens in embodiment 1 of the present invention;
fig. 3 is a defocus curve of the small field angle lens in embodiment 1 of the present invention;
fig. 4 is a graph of MTF transfer function of the small field angle lens in embodiment 1 of the present invention;
fig. 5 is an astigmatic field curve and optical distortion characteristic curve of a small field angle lens according to embodiment 1 of the present invention;
fig. 6 is a two-dimensional view of a small field angle lens in embodiment 2 of the present invention;
fig. 7 is a defocus curve of a small field angle lens in embodiment 2 of the present invention;
fig. 8 is a graph of MTF transfer function of a small field angle lens in embodiment 2 of the present invention;
fig. 9 shows an astigmatic field curve and an optical distortion characteristic curve of a small field angle lens according to embodiment 2 of the present invention.
Detailed Description
In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.
A small field angle lens, comprising, in order from an object side: the optical lens system comprises a first lens L1 with positive focal power, a second lens L2 with negative focal power, a concave object side and a concave image side, a third lens L3 with a concave object side and a convex image side, and a fourth lens L4 with negative focal power, a concave object side and a convex image side, wherein the first lens L1 with the positive focal power enables all aberrations to be well corrected by the distribution of the positive and negative focal powers of the above 4 lenses, and the lateral chromatic aberration of the system is corrected to be less than 2.5 um.
And satisfies the following conditional expressions:
2<ct1/ct2<8
0.5<R5/R6<2.0
here, ct1 is the center distance from the first lens L1 to the second lens L2, and ct2 is the center distance from the second lens L2 to the third lens L3.
Because the object shot by the lens is an iris, the shooting angle range is required to be small, the position of the second lens L2 relative to the first lens L1 and the third lens L3 determines the shooting angle of view range, the ratio of ct1/ct2 is more than 2, the angle of view of the second lens L2 close to the first lens L1 is wide, and the imaging range is large; when the second lens element L2 is close to the third lens element L3, the field of view is narrow, and the iris cannot be accurately imaged
The small-field-angle lens further satisfies the following relation:
-10<f2/f<-2.5
-15<(R4+R5)/(R4-R5)<-5
wherein R4 and R5 are the object-side and image-side radii of curvature of the second lens L2, respectively, and f2 and f are the focal length of the second lens L2 and the system focal length, respectively.
The refractive power of the second lens L2 determines the focal length, and the formula limits the range of the focal length and the total length, so that the curvature of the second lens L2 is ensured to be suitable for manufacturing and the lens length can be adapted to equipment.
The small-field-angle lens further satisfies the following relation:
1.45<ct2/ct3<1.5
wherein ct2 is the central distance from the second lens L2 to the third lens L3, ct3 is the central distance from the third lens L3 to the fourth lens L4, f3 is the focal length of the third lens L3, and f is the effective focal length of the system.
The position of the third lens L3 relative to the second lens L2 and the fourth lens L4 determines the overall field of view, and the formula limits the position of the third lens L3 so that the maximum field of view satisfies the image aperture and the total lens length.
The small-field-angle lens further satisfies the following relation:
0.5<Y1/ImgH<0.85
0.7<Y2/ImgH<0.95
y1 is the image-side effective clear aperture of the third lens element L3, ImgH is the total image height, and Y2 is the image-side effective clear aperture of the fourth lens element L4.
The conditional expression is beneficial to improving the edge resolution of the system, and realizes the smaller caliber of the object side surface so as to meet the requirement of the structure design of the smart phone.
The small-field-angle lens further satisfies the following relation:
-44.7<f3/f<-45
-2<f4/f<2.05
where f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, and f is the effective focal length of the system.
The image sides of the third lens L3 and the fourth lens L4 are convex surfaces, the bending degrees of the third lens L3 and the fourth lens L4 are regulated, and the relationship is satisfied, so that the reasonable distribution of the focal power is facilitated, the total length is shortened, and the aberration is controlled to meet the actual use requirement.
All 4 lenses of the small-field-angle lens adopt even-order aspheric plastic lenses, and aspheric coefficients meet the following equation:
Z＝cy2/[1+{1－(1+k)c2y2}+1/2]+A4y4+A6y6+A8y8
+A10y10+A12y12+A14y14+A16y16+A18y18+A20y20
wherein,
z: the vector height of the non-spherical surface,
c: the curvature of the aspheric surface in the paraxial region,
y: the aperture of the lens is measured by the lens,
k: the coefficient of the cone is the coefficient of the cone,
A4: the 4-order aspherical surface coefficient is determined,
A6: the coefficient of the aspherical surface at the degree of 6,
A8: the coefficient of the aspherical surface at the degree of 8,
A10: the coefficient of the aspherical surface is given by 10 times,
A12: the coefficient of the aspherical surface at the order of 12,
A14: the aspherical surface coefficient of the order of 14,
A16: the coefficient of the aspherical surface is 16 times,
A18: the coefficient of the aspherical surface is 18 times,
A20: aspheric coefficients of degree 20.
The utility model discloses an adopt 4 aspheric surface plastic lenses, can realize that the biggest field angle is 28.3, optics overall length 4.62mm, the aperture value is the bright camera lens of the little field angle of F2.2, shoots also having fine performance under to darker environment, and the biggest image circle is phi 2.8 mm. The minute structure can be widely used.
Example 1
The full field angle is 28 degrees, the F value of the aperture is 2.2, and the total optical length TTL (distance from the most front end of the lens to the image plane) is 4.62 mm.
The first lens L1 is an anterior convex lens having positive optical power; the second lens L2 is a biconcave lens with negative optical power; the third lens L3 is a rear convex meniscus lens having a negative power; the fourth lens L4 is a meniscus lens with negative power
The second lens satisfies the following conditional expression: -15< (R4+ R5)/(R4-R5) < -5. R4 and R5 represent object-side and image-side radii of curvature of the second lens L2
The third lens satisfies the following conditional expression: 0.5< Y1/ImgH <0.85, -44.7< f3/f < -45. Y1 is the image-side effective clear aperture diameter of the third lens element L3, and ImgH is the total image height; f3 is the focal length of the third lens L3, and f is the effective focal length of the system.
The fourth lens satisfies the following conditional expression: 0.7< Y2/ImgH <0.95, -2< f4/f < 2.05. Y2 is the image-side effective clear aperture of the fourth lens element L4, and ImgH is the total image height; f4 is the focal length of the fourth lens L4, and f is the effective focal length of the system.
The lens satisfies the following conditional expressions: 2< ct1/ct2<8, -10< f2/f < -1.8. ct1 is the center distance from the first lens L1 to the second lens L2, and ct2 is the center distance from the second lens L2 to the third lens L3. f2 and f are the focal length of the second lens L2 and the system focal length, respectively.
Please refer to table 1(a) and table 1(b) for design parameters of the small field angle lens.
TABLE 1(a)
| Number of noodles | Surface type | Curvature | Thickness of | Material properties | Effective half caliber |
| Article (A) | Spherical surface | Infinite number of elements | 300 | ||
| Stop | Spherical surface | Infinite number of elements | -0.4352895 | 1.145 | |
| 2 | Aspherical surface | 1.579119895 | 0.8941527 | 1.546，56.039 | 1.149 |
| 3 | Aspherical surface | 9.151255477 | 1.38 | 1.088 | |
| 4 | Aspherical surface | -6.94371771 | 0.26 | 1.546，56.039 | 0.815 |
| 5 | Aspherical surface | 7.869459565 | 0.3553908 | 0.854 | |
| 6 | Aspherical surface | -5.00080919 | 0.3 | 1.546，56.039 | 0.933 |
| 7 | Aspherical surface | -5.33215714 | 0.2407159 | 1.100 | |
| 8 | Aspherical surface | -1.79768158 | 0.3697407 | 1.537，56.109 | 1.164 |
| 9 | Aspherical surface | -2.92450522 | 0.2271639 | 1.203 | |
| 10 | Spherical surface | Infinite number of elements | 0.3 | BK7_SCHOTT | 1.302 |
| 11 | Spherical surface | Infinite number of elements | 0.2928358 | 1.341 | |
| Image | Spherical surface | Infinite number of elements | 0 | 1.402 |
TABLE 1(b)
| Number of noodles | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | -1.23824 | -26.26250 | 64.02574 | 58.17980 | 21.33024 | -1.40149 | -29.53628 | -60.69597 |
| 4 | 0.02562 | 0.00098 | 0.07273 | 0.13566 | -0.04779 | -0.06486 | -0.52382 | -0.32197 |
| 6 | 0.02816 | 0.01357 | -0.82394 | -0.17166 | -0.08281 | -0.34750 | 0.83829 | 0.40290 |
| 8 | -0.16441 | -0.17729 | 3.07444 | 0.32897 | 0.15371 | 0.83505 | -0.62182 | -0.25387 |
| 10 | 0.56430 | 0.69960 | -6.36583 | 0.17250 | 0.17992 | -0.58073 | 0.31439 | 0.04283 |
| 12 | -1.14581 | -1.62139 | 6.72313 | -0.14549 | 0.07360 | 0.18368 | -0.08719 | 0.00681 |
| 14 | 1.39617 | 2.25793 | -3.25411 | -0.26005 | -0.09988 | -0.01731 | 0.01259 | 0.00446 |
| 16 | -1.00613 | -1.86025 | 0.48359 | 0 | -0.16699 | -0.02856 | -0.00350 | 0.00017 |
| 18 | 0.39481 | 0.83267 | 0 | 0 | 0 | 0 | 0 | 0 |
| 20 | -0.06508 | -0.15592 | 0 | 0 | 0 | 0 | 0 | 0 |
As shown in fig. 2, it is a two-dimensional diagram of the small field angle lens in the present embodiment. The lens of the small-field-angle lens is rotationally symmetrical in shape and convenient to mold, produce and process. Moreover, the distance between the lenses is reasonable, and the structural design at the later stage is convenient.
As shown in fig. 3, the defocus curve of the small field angle lens in this embodiment shows that the closer the peak of the curve is to the center point, the better the optical performance is, and the smaller the curvature of field is.
As shown in fig. 4, the MTF transfer function graph (optical transfer function) of the small field angle lens in this embodiment can comprehensively reflect the imaging quality of the system, and the smoother the curve shape and the higher the height with respect to the X axis, prove that the imaging quality of the system is better, and when the spatial frequency of the optical system lens is 110lp/mm, the MTF within 0.9 field is greater than 0.5, and the optical system lens has higher image resolution capability.
As shown in fig. 5, the characteristic curve of the astigmatic field curvature and the optical distortion of the small field angle lens in this embodiment is shown. The field curvature correction of the small-field-angle lens is good, and the distortion of each field is controlled within 2%.
Example 2
The full field angle is 28 degrees, the F value of the aperture is 2.2, and the total optical length TTL (distance from the most front end of the lens to the image plane) is 4.62 mm.
The first lens L1 is an anterior convex lens having positive optical power; the second lens L2 is a biconcave lens with negative optical power; the third lens L3 is a rear convex meniscus lens having a negative power; the fourth lens L4 is a meniscus lens with negative power
The second lens satisfies the following conditional expression: -10< (R4+ R5)/(R4-R5) < -1. R4 and R5 represent object-side and image-side radii of curvature of the second lens L2
The third lens satisfies the following conditional expression: 0.6< Y1/ImgH <0.9, -20< f3/f < -30. Y1 is the image-side effective clear aperture diameter of the third lens element L3, and ImgH is the total image height; f3 is the focal length of the third lens L3, and f is the effective focal length of the system.
The fourth lens satisfies the following conditional expression: 0.8< Y2/ImgH <0.95, -1.8< f4/f <2. Y2 is the image-side effective clear aperture of the fourth lens element L4, and ImgH is the total image height; f4 is the focal length of the fourth lens L4, and f is the effective focal length of the system.
The lens satisfies the following conditional expressions: 3.2< ct1/ct2<4, -3< f2/f < -1.5. ct1 is the center distance from the first lens L1 to the second lens L2, and ct2 is the center distance from the second lens L2 to the third lens L3. f2 and f are the focal length of the second lens L2 and the system focal length, respectively.
Please refer to table 2(a) and table 2(b) for design parameters of the small field angle lens:
TABLE 2(a)
TABLE 2(b)
| Number of noodles | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | -1.21387 | -18.72274 | 54.75596 | 12.23467 | 23.23830 | 6.75345 | -37.61748 | -100 |
| 4 | 0.02632 | 0.00202 | 0.05691 | 0.11710 | -0.05149 | -0.06589 | -0.51128 | -0.30386 |
| 6 | 0.02864 | 0.01497 | -0.78209 | -0.22232 | -0.12176 | -0.31691 | 0.83749 | 0.38408 |
| 8 | -0.16431 | -0.17687 | 2.94364 | 0.38028 | 0.15600 | 0.84529 | -0.62283 | -0.25391 |
| 10 | 0.56454 | 0.69939 | -6.27005 | 0.07381 | 0.21139 | -0.58162 | 0.31370 | 0.04838 |
| 12 | -1.14572 | -1.62155 | 6.92507 | -0.25812 | 0.09313 | 0.17993 | -0.08717 | 0.00820 |
| 14 | 1.39614 | 2.25792 | -3.53262 | -0.10952 | -0.11282 | -0.02124 | 0.01224 | 0.00378 |
| 16 | -1.00619 | -1.86019 | 0.48359 | 0 | -0.23887 | -0.03016 | -0.00408 | -0.00141 |
| 18 | 0.39479 | 0.83271 | 0 | 0 | 0 | 0 | 0 | 0 |
| 20 | -0.06506 | -0.15596 | 0 | 0 | 0 | 0 | 0 | 0 |
Fig. 6 is a two-dimensional view of a small field angle lens in the present embodiment;
fig. 7 is a defocus curve of the small field angle lens in the present embodiment;
fig. 8 is a graph of MTF transfer function of the small field angle lens in the present embodiment;
fig. 9 shows an astigmatic field curvature and an optical distortion characteristic curve of the small-field-angle lens in embodiment 2.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (5)
1. A small field angle lens, comprising, in order from an object side: a first lens L1 having a positive refractive power, a second lens L2 having a negative refractive power and being concave on both the object side and the image side, a third lens L3 having a negative refractive power and being concave on the object side and convex on the image side, and a fourth lens L4 having a negative refractive power and being concave on the object side and convex on the image side, and the following conditional expressions are satisfied:
2<ct1/ct2<8
0.5<R5/R6<2.0
here, ct1 is the center distance from the first lens L1 to the second lens L2, and ct2 is the center distance from the second lens L2 to the third lens L3.
2. The small field angle lens according to claim 1, wherein the small field angle lens further satisfies the following relation:
-10<f2/f<-2
-15<(R4+R5)/(R4-R5)<-5
wherein R4 and R5 are the object-side and image-side radii of curvature of the second lens L2, respectively, and f2 and f are the focal length of the second lens L2 and the system focal length, respectively.
3. The small field angle lens according to claim 1, wherein the small field angle lens further satisfies the following relation:
1.45<ct2/ct3<1.5
wherein ct2 is the central distance from the second lens L2 to the third lens L3, ct3 is the central distance from the third lens L3 to the fourth lens L4, f3 is the focal length of the third lens L3, and f is the effective focal length of the system.
4. The small field angle lens according to claim 1, wherein the small field angle lens further satisfies the following relation:
0.5<Y1/ImgH<0.85
0.7<Y2/ImgH<0.95
y1 is the image-side effective clear aperture of the third lens element L3, ImgH is the total image height, and Y2 is the image-side effective clear aperture of the fourth lens element L4.
5. The small field angle lens according to claim 1, wherein the small field angle lens further satisfies the following relation:
-44.7<f3/f<-45
-2<f4/f<2.05
where f3 is the focal length of the third lens L3, f4 is the focal length of the fourth lens L4, and f is the effective focal length of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820717022.3U CN208239711U (en) | 2018-05-15 | 2018-05-15 | A kind of small field of view angle mirror head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820717022.3U CN208239711U (en) | 2018-05-15 | 2018-05-15 | A kind of small field of view angle mirror head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208239711U true CN208239711U (en) | 2018-12-14 |
Family
ID=64580089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820717022.3U Active CN208239711U (en) | 2018-05-15 | 2018-05-15 | A kind of small field of view angle mirror head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208239711U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190270A (en) * | 2020-04-13 | 2020-05-22 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| WO2021232242A1 (en) * | 2020-05-19 | 2021-11-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens which takes into consideration image processing-based distortion correction, camera module and imaging device |
-
2018
- 2018-05-15 CN CN201820717022.3U patent/CN208239711U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190270A (en) * | 2020-04-13 | 2020-05-22 | 江西联益光学有限公司 | Optical lens and imaging apparatus |
| WO2021232242A1 (en) * | 2020-05-19 | 2021-11-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Imaging lens which takes into consideration image processing-based distortion correction, camera module and imaging device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110346897B (en) | Optical imaging lens | |
| CN110554484B (en) | Optical imaging system | |
| CN109239891B (en) | Optical imaging lens group | |
| CN110018556B (en) | Optical imaging lens | |
| CN108037579B (en) | Optical imaging lens | |
| TWI724919B (en) | Six-piece optical lens system with a wide field of view | |
| CN208239711U (en) | A kind of small field of view angle mirror head | |
| CN211014809U (en) | Optical imaging system | |
| CN109116514B (en) | Iris recognition lens with large view field angle | |
| CN216411707U (en) | Optical imaging lens group | |
| CN214623165U (en) | Optical imaging lens | |
| CN112684586B (en) | Optical system, camera module and terminal equipment | |
| CN112684590B (en) | Optical imaging lens | |
| CN213365166U (en) | Miniature telescope lens | |
| CN211741703U (en) | Optical imaging lens | |
| CN208172359U (en) | A kind of imaging lens system group | |
| CN114527556B (en) | Optical pick-up lens group | |
| CN216411706U (en) | Optical imaging lens | |
| CN208270839U (en) | A kind of microcephaly's large aperture micro lens | |
| CN108051900B (en) | Image pickup optical lens | |
| CN214751061U (en) | Image lens | |
| CN108627954A (en) | A kind of imaging lens system group | |
| CN113514932B (en) | Optical imaging lens | |
| CN110542992B (en) | Optical imaging system | |
| CN113835191B (en) | Five-piece infrared single focus lens group |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200427 Address after: 124000 2F, No.4 electronic workshop, high tech Industrial Development Zone, no.388, Zhonghua North Road, Xinglongtai District, Panjin City, Liaoning Province Patentee after: Liaoning Zhonglan Photoelectric Technology Co., Ltd Address before: 124000 Xinglongtai District, Panjin, Liaoning Province, China Road East Patentee before: LIAONING ZHONGLAN ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A small field angle lens Effective date of registration: 20210726 Granted publication date: 20181214 Pledgee: China Construction Bank Corporation Panjin branch Pledgor: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Registration number: Y2021210000049 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |