CN109375352B - Infrared confocal lens - Google Patents
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- CN109375352B CN109375352B CN201811605243.2A CN201811605243A CN109375352B CN 109375352 B CN109375352 B CN 109375352B CN 201811605243 A CN201811605243 A CN 201811605243A CN 109375352 B CN109375352 B CN 109375352B
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- 238000003384 imaging method Methods 0.000 claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims description 17
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- 102220264750 rs1305455942 Human genes 0.000 claims description 3
- 102220012898 rs397516346 Human genes 0.000 claims description 3
- 102220095236 rs876658436 Human genes 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000004075 alteration Effects 0.000 description 4
- 210000005056 cell body Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- CNQCVBJFEGMYDW-UHFFFAOYSA-N lawrencium atom Chemical compound [Lr] CNQCVBJFEGMYDW-UHFFFAOYSA-N 0.000 description 1
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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
- G02B13/0045—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 five or more lenses
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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
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
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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
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
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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
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The embodiment of the invention discloses an infrared confocal lens. The infrared confocal lens comprises a refraction lens group and an imaging component positioned on the light emitting side of the refraction lens group; the refraction lens group comprises a first negative-power lens, a second positive-power lens, a third positive-power lens, a fourth positive-power lens, a fifth positive-power lens, a sixth negative-power lens and a seventh positive-power lens which are sequentially arranged along the incident direction of light rays; wherein the focal length f6 of the sixth lens and the focal length f7 of the seventh lens satisfy the following relationship: 0.8 </f 6/f7 <1.2. The technical scheme of the embodiment of the invention is suitable for the design of the infrared confocal lens in the security field, and the lens has the advantages of confocal visible light and infrared light, simple structure and high resolution.
Description
Technical Field
The embodiment of the invention relates to the technology of optical devices, in particular to an infrared confocal lens.
Background
With the rapid development of science and technology, people have higher-level understanding of security and protection, and the monitoring lens is born immediately. Compared with a zoom lens, the fixed-focus lens is simple in design and manufacture, and the shot images of the moving objects are clear and stable, and the images are fine and smooth, so that the fixed-focus lens occupies an important position in the security monitoring industry.
With the improvement of security consciousness of society, all-weather monitoring is a necessary condition of security lenses, and the definition of images in visible light and infrared illumination environments is required to be consistent, so that the visible light and infrared confocal lenses have wide requirements. Because the traditional fixed focus lens often has more lenses, the volume and the weight of the lens are huge, and the use is inconvenient while the manpower and the material resources are wasted. Too large a lens or too high a cost can affect the popularity and use of the product.
Disclosure of Invention
The embodiment of the invention provides an infrared confocal lens to realize the design of the infrared confocal lens suitable for the security field, and has the advantages of visible light and infrared light confocal, simple structure and high resolution.
The embodiment of the invention provides an infrared confocal lens, which comprises a refraction lens group and an imaging component positioned on the light emitting side of the refraction lens group, wherein the refraction lens group comprises seven lenses;
the refraction lens group comprises a negative focal power first lens, a positive focal power second lens, a positive focal power third lens, a positive focal power fourth lens, a positive focal power fifth lens, a negative focal power sixth lens and a positive focal power seventh lens which are sequentially arranged along the incidence direction of light rays;
wherein a focal length f6 of the sixth lens and a focal length f7 of the seventh lens satisfy the following relationship:
0.8<︱f6/f7︱<1.2；
the refractive lens group satisfies the following parameters:
| f1＝-11.7 | n1＝1.55 | R1＝9.3 | R2＝3.5 |
| f2＝71.8 | n2＝1.55 | R3＝-3.12 | R4＝-3.5 |
| f3＝18.5 | n3＝1.55 | R5＝10.2 | R6＝Inf |
| f4＝51.9 | n4＝1.80 | R7＝Inf | R8＝-41.5 |
| f5＝17.3 | n5＝1.45 | R9＝7.8 | R10＝Inf |
| f6＝-6.6 | n6＝1.60 | R11＝-106.8 | R12＝4.12 |
| f7＝6.3 | n7＝1.60 | R13＝5.15 | R14＝-10.16 |
wherein f1 to f7 represent focal lengths of the first lens to the seventh lens in mm, n1 to n7 represent refractive indexes of the first lens to the seventh lens, R1, R3, R5, R7, R9, R11, R13 represent radii of curvature of the first lens to the seventh lens toward the center of the object side surface in order, respectively, in mm, R2, R4, R6, R8, R10, R12, R14 represent radii of curvature of the first lens to the seventh lens toward the center of the image side surface in order, in mm, "-" represent directions are negative, and Inf represents infinity, that is, represents a plane.
Optionally, the refractive lens group is coaxially disposed with the imaging component, and the imaging component is located on a focal plane of the refractive lens group.
Optionally, the imaging component includes a photosensitive element and a transparent protection plate, and the transparent protection plate is located between the photosensitive element and the refractive lens group.
Optionally, a diaphragm is located between the fourth lens and the fifth lens.
Optionally, the third lens and the fourth lens form a cemented lens.
Optionally, the first lens, the third lens, the fourth lens and the fifth lens are spherical lenses, and the second lens, the sixth lens and the seventh lens are aspherical lenses.
Optionally, the surface shape of the aspherical lens is represented by the formula:
determining, wherein z is sagittal height, c is curvature at the vertex of the curved surface, r is distance between projection of coordinates of the curved surface point on a plane perpendicular to the optical axis and the optical axis, k is a conical coefficient, and a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 And a 8 Representing the coefficient to which the even term corresponds.
Optionally, the first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a plano-convex lens, the fourth lens is a plano-convex lens, the fifth lens is a plano-convex lens, the sixth lens is a biconcave lens, and the seventh lens is a biconvex lens.
Optionally, the total length of the infrared confocal lens is less than 23mm.
The infrared confocal lens provided by the embodiment of the invention comprises a refraction lens group and an imaging component positioned on the light emitting side of the refraction lens group; the refraction lens group comprises a first negative-power lens, a second positive-power lens, a third positive-power lens, a fourth positive-power lens, a fifth positive-power lens, a sixth negative-power lens and a seventh positive-power lens which are sequentially arranged along the incident direction of light rays; wherein the focal length f6 of the sixth lens and the focal length f7 of the seventh lens satisfy 0.8< |f6/f7| <1.2. The focal length f6 of the sixth lens and the focal length f7 of the seventh lens are set to meet 0.8< |f6/f7| <1.2, and the visible light and infrared light confocal optical lens with simple structure and high resolution can be designed.
Drawings
Fig. 1 is a schematic structural diagram of an infrared confocal lens according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a modulation transfer function MTF curve of visible light according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an MTF curve of infrared light provided by an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic structural diagram of an infrared confocal lens according to an embodiment of the invention. Referring to fig. 1, the infrared confocal lens includes a refractive lens assembly 10 and an imaging assembly 20 disposed on the light-emitting side of the refractive lens assembly 10; the refractive lens group 10 includes seven lenses in total, and the refractive lens group 10 includes a negative power first lens 101, a positive power second lens 102, a positive power third lens 103, a positive power fourth lens 104, a positive power fifth lens 105, a negative power sixth lens 106, and a positive power seventh lens 107, which are arranged in order along the light incident direction; wherein the focal length f6 of the sixth lens 106 and the focal length f7 of the seventh lens 107 satisfy the following relationship: 0.8 </f 6/f7 <1.2.
Among other things, it is understood that the optical power is equal to the difference between the image Fang Guangshu convergence and the object beam convergence, which characterizes the ability of the optical system to deflect light. The greater the absolute value of the optical power, the greater the ability to bend the light, the smaller the absolute value of the optical power, and the weaker the ability to bend the light. When the focal power is positive, the refraction of the light rays is convergent; when the optical power is negative, the refraction of the light is divergent. The optical power may be suitable for characterizing a refractive surface of a lens (i.e. a surface of a lens), for characterizing a lens, or for characterizing a system of lenses together (i.e. a lens group). In this embodiment, each lens can be fixed in one lens barrel (not shown in fig. 1), and confocal can be achieved in a wavelength range of 436 nm-850 nm by reasonably distributing the focal power of the lens, and in one embodiment of the present invention, the focal length of the refractive lens group is 8mm, the aperture f=1.4, and the refractive lens group can be matched with imaging components of 600 ten thousand pixels and more than 600 ten thousand pixels, and has the advantages of large light flux and high resolution.
According to the technical scheme, through designing that the focal power of each lens in the refraction lens group is matched with each other, and through setting the focal length f6 of the sixth lens and the focal length f7 of the seventh lens to meet 0.8 </i > f6/f7 </i > 1.2, the visible light and infrared light confocal optical lens with simple structure and high resolution can be designed.
On the basis of the above technical solution, optionally, with continued reference to fig. 1, the refractive lens group 10 is coaxially arranged with the imaging assembly 20, and the imaging assembly 20 is located on the focal plane of the refractive lens group 10.
It will be appreciated that by coaxially arranging the refractive lens assembly 10 and the imaging assembly 10, the complexity of designing the refractive lens assembly 10 can be reduced, the imaging accuracy of the refractive lens assembly 10 can be improved, and the focal length of the refractive lens assembly 10 is 8mm in this embodiment, and the imaging surface of the imaging assembly 20 is located at a distance of 8mm from the refractive lens assembly 10.
Optionally, with continued reference to fig. 1, the imaging assembly 20 includes a photosensitive element 201 and a transparent protective plate 202, the transparent protective plate 202 being positioned between the photosensitive element 201 and the refractive lens group 10.
The transparent protection plate 202 may be a glass plate or an optical filter with a function of filtering out some light, for protecting the photosensitive element 201, where the photosensitive element 201 may include a charge coupled device CCD or a complementary metal oxide semiconductor CMOS, and in this embodiment, the cost of the lens may be effectively reduced by selecting COMS as the photosensitive element.
Optionally, with continued reference to fig. 1, the infrared confocal lens further includes a stop 30 positioned between fourth lens 104 and fifth lens 105. The diaphragm 30 is used for the light flux that can be infrared confocal lens.
Optionally, the third lens 103 and the fourth lens 104 constitute a cemented lens.
It is understood that the cemented lens includes two lenses, and the surfaces of the two lenses adjacent to each other are identical in shape and fit together. The cemented lens has good aberration correcting capability, and is particularly suitable for correcting chromatic aberration. In the embodiment of the invention, the third lens 103 and the fourth lens 104 form a cemented lens, which is favorable for correcting chromatic aberration in the infrared confocal lens.
Optionally, the first lens 101, the third lens 103, the fourth lens 104 and the fifth lens 105 are spherical lenses, and the second lens 102, the sixth lens 106 and the seventh lens 107 are aspherical lenses.
In the present embodiment, the first lens element 101, the third lens element 103, the fourth lens element 104 and the fifth lens element 105 are spherical lenses made of glass material, and the second lens element 102, the sixth lens element 106 and the seventh lens element 107 are aspheric lenses made of plastic material, so that aberration can be effectively eliminated.
Alternatively, the aspherical lens has a surface shape represented by the formula:
determining, wherein z is sagittal height, c is curvature at the vertex of the curved surface, r is distance between projection of coordinates of the curved surface point on a plane perpendicular to the optical axis and the optical axis, k is a conical coefficient, and a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 And a 8 Representing the coefficient to which the even term corresponds.
In this embodiment, the even term coefficient of the aspherical lens is:
TABLE 1 aspherical lens profile parameters
| a 1 | a 2 | a 3 | a 4 | a 5 | a 6 | a 7 | a 8 | |
| Face number 3 | 0 | -2.26E-03 | -2.87E-05 | 3.85E-06 | -2.40E-07 | 1.17E-09 | 0 | 0 |
| Face number 4 | 0 | -1.01E-01 | 2.25E-06 | 5.32E-06 | 2.79E-06 | 3.13E-09 | 0 | 0 |
| Face number 11 | 0 | 5.57E-01 | -6.01E-03 | -8.49E-05 | 2.28E-07 | -1.93E-07 | 0 | 0 |
| Face number 12 | 0 | -3.89E-03 | -2.33E-04 | 4.65E-06 | 4.28E-07 | 1.96E-08 | 0 | 0 |
| Face number 13 | 0 | -2.30E-02 | -2.83E-06 | 2.36E-06 | -5.08E-09 | 7.53E-05 | 0 | 0 |
| Face number 14 | 0 | -5.01E-03 | 2.43E-04 | -4.54E-04 | 2.31E-05 | -3.50E-07 | 0 | 0 |
Wherein, the surface number 3, the surface number 11 and the surface number 13 correspond to the front surfaces of the second lens 102, the sixth lens 106 and the seventh lens 107 near the object plane, and the surface number 4, the surface number 12 and the surface number 14 correspond to the rear surfaces of the second lens 102, the sixth lens 106 and the seventh lens 107 near the image plane.
Optionally, with continued reference to fig. 1, in a specific example of an embodiment of the present invention, the first lens 101 is a meniscus lens, the second lens 102 is a meniscus lens, the third lens 103 is a plano-convex lens, the fourth lens 104 is a plano-convex lens, the fifth lens 105 is a plano-convex lens, the sixth lens 106 is a biconcave lens, and the seventh lens 107 is a biconvex lens.
It will be appreciated that the particular lens shape may be selected based on the design of the light angle, and that the above is merely a specific example and is not a limitation of embodiments of the present invention.
Optionally, refractive lens group 10 satisfies the following parameters:
table 2 refractive lens group parameters
| f1＝-11.7 | n1＝1.55 | R1＝9.3 | R2＝3.5 |
| f2＝71.8 | n2＝1.55 | R3＝-3.12 | R4＝-3.5 |
| f3＝18.5 | n3＝1.55 | R5＝10.2 | R6＝Inf |
| f4＝51.9 | n4＝1.80 | R7＝Inf | R8＝-41.5 |
| f5＝17.3 | n5＝1.45 | R9＝7.8 | R10＝Inf |
| f6＝-6.6 | n6＝1.60 | R11＝-106.8 | R12＝4.12 |
| f7＝6.3 | n7＝1.60 | R13＝5.15 | R14＝-10.16 |
Wherein f1 to f7 represent focal lengths of the first lens to the seventh lens in mm, n1 to n7 represent refractive indexes of the first lens to the seventh lens, R1, R3, R5, R7, R9, R11, R13 represent radii of curvature of the first lens to the seventh lens toward the center of the object side surface in order, respectively, R2, R4, R6, R8, R10, R12, R14 represent radii of curvature of the first lens to the seventh lens toward the center of the image side surface in order, respectively, in mm, "-" represents a negative direction, and Inf represents infinity, that is, a plane.
Optionally, the total length of the infrared confocal lens is less than 23mm. The total length of the lens is less than 23mm, which is beneficial to reducing the volume of the lens and meeting the size requirement of general security protection on the lens.
Table 3 shows lens parameter design values for one embodiment of the present invention:
TABLE 3 design values for lenses in refractive lens groups
| Face number | Surface type | R(mm) | D(mm) | nd | k |
| 1 | Spherical surface | 9.3 | 2.1 | 1.55 | |
| 2 | Spherical surface | 3.5 | 2.4 | ||
| 3 | Aspherical surface | -3.12 | 1.85 | 1.55 | 0.2 |
| 4 | Aspherical surface | -3.5 | 0.05 | -85.3 | |
| 5 | Spherical surface | 10.2 | 1.45 | 1.55 | |
| 6 | Plane surface | PL | 1.26 | 1.80 | |
| 7 | Spherical surface | -41.5 | 0.05 | ||
| Diaphragm surface | Spherical surface | PL | 0.05 | ||
| 9 | Spherical surface | 7.8 | 2.3 | 1.45 | |
| 10 | Spherical surface | PL | 0.1 | ||
| 11 | Aspherical surface | -106.8 | 0.68 | 1.60 | -12.63 |
| 12 | Aspherical surface | 4.12 | 0.12 | 11.26 | |
| 13 | Aspherical surface | 5.15 | 3.88 | 1.60 | 106.52 |
| 14 | Aspherical surface | -10.16 | 2.35 | 83.66 | |
| 15 | Spherical surface | Plane surface | 0.7 | 1.52 | |
| 16 | Spherical surface | Plane surface | 3.2 | ||
| 17 | Image plane | Plane surface |
Wherein the plane number 1 indicates the front surface of the first lens 101 near the object side, and so on, PL indicates that the surface is a plane, and since the third lens 103 and the fourth lens 104 are cemented lenses, which share the plane 6, the plane numbers 15 and 16 indicate both surfaces of the transparent protection plate 202; r represents the spherical radius, positive represents one side of the spherical center close to the image plane, and negative represents one side of the spherical center close to the object plane; d represents the distance on the optical axis from the current surface to the next surface; nd represents the refractive index of the lens; k represents the conic coefficient of the aspherical surface.
In addition, a spacer (not shown in fig. 1) is disposed between the lenses, specifically, the first lens 101 and the second lens 102 are abutted by a SOMA sheet, the second lens 102 and the third lens are tightly combined by a metal spacer, the fourth lens 104 and the fifth lens 105 are tightly combined by a spacer, the fifth lens 105 and the sixth lens 106 are abutted by a SOMA sheet, and the sixth lens 106 and the seventh lens 107 are abutted by a SOMA sheet.
The infrared confocal lens provided by the embodiment can reach 600 ten thousand pixel resolution under the visible light and infrared states, can be matched with a 600 ten thousand 1/2.7 inch CMOS chip, and can obtain a clear picture even under a night low-illumination environment. Meanwhile, the design does not run coke in the environment of-40 ℃ to 80 ℃.
Specifically, fig. 2 is a schematic diagram of a modulation transfer function MTF of visible light provided by the embodiment of the present invention, and fig. 3 is a schematic diagram of an MTF of infrared light provided by the embodiment of the present invention. To achieve 600 ten thousand pixel resolution, it is desirable that the MTF of the visible light of the center field of view is greater than 0.4, the MTF of the edge field of view is greater than 0.2, and the MTF of the infrared light of the center field of view is greater than 0.4,0.7 times the MTF of the edge field of view is greater than 0.2 at a spatial resolution of 200 line pairs/millimeter. Referring to fig. 2 and 3, it can be seen that the resolution is greater than 600 ten thousand pixels for both visible light and infrared light.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (9)
1. The infrared confocal lens is characterized by comprising a refraction lens group and an imaging component positioned on the light emitting side of the refraction lens group, wherein the refraction lens group comprises seven lenses;
the refraction lens group comprises a negative focal power first lens, a positive focal power second lens, a positive focal power third lens, a positive focal power fourth lens, a positive focal power fifth lens, a negative focal power sixth lens and a positive focal power seventh lens which are sequentially arranged along the incidence direction of light rays;
wherein a focal length f6 of the sixth lens and a focal length f7 of the seventh lens satisfy the following relationship:
0.8<︱f6/f7︱<1.2；
the refractive lens group satisfies the following parameters:
wherein f1 to f7 represent focal lengths of the first lens to the seventh lens in mm, n1 to n7 represent refractive indexes of the first lens to the seventh lens, R1, R3, R5, R7, R9, R11, R13 represent radii of curvature of the first lens to the seventh lens toward the center of the object side surface in order, respectively, in mm, R2, R4, R6, R8, R10, R12, R14 represent radii of curvature of the first lens to the seventh lens toward the center of the image side surface in order, in mm, "-" represent directions are negative, and Inf represents infinity, that is, represents a plane.
2. The infrared confocal lens of claim 1 wherein the refractive lens assembly is disposed coaxially with the imaging assembly, the imaging assembly being located at a focal plane of the refractive lens assembly.
3. The infrared confocal lens of claim 2 wherein the imaging assembly comprises a photosensitive element and a transparent protective plate, the transparent protective plate being positioned between the photosensitive element and the refractive lens group.
4. The infrared confocal lens of claim 1, further comprising a stop positioned between the fourth lens and the fifth lens.
5. The infrared confocal lens of claim 1, wherein the third lens and the fourth lens form a cemented lens.
6. The infrared confocal lens of claim 1, wherein the first lens, the third lens, the fourth lens, and the fifth lens are spherical lenses, and the second lens, the sixth lens, and the seventh lens are aspherical lenses.
7. The infrared confocal lens of claim 6 wherein the aspherical lens has a surface shape represented by the formula:
determining, wherein z is sagittal height, c is curvature at the vertex of the curved surface, r is distance between projection of coordinates of the curved surface point on a plane perpendicular to the optical axis and the optical axis, k is a conical coefficient, and a 1 、a 2 、a 3 、a 4 、a 5 、a 6 、a 7 And a 8 Representing the coefficient to which the even term corresponds.
8. The infrared confocal lens of claim 1, wherein the first lens is a meniscus lens, the second lens is a meniscus lens, the third lens is a plano-convex lens, the fourth lens is a plano-convex lens, the fifth lens is a plano-convex lens, the sixth lens is a biconcave lens, and the seventh lens is a biconvex lens.
9. The infrared confocal lens of claim 1 wherein the total length of the infrared confocal lens is less than 23mm.
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| CN111929820B (en) * | 2020-09-02 | 2021-03-09 | 诚瑞光学(苏州)有限公司 | Image pickup optical lens |
| CN112261253B (en) * | 2020-10-15 | 2022-05-03 | 浙江大华技术股份有限公司 | Confocal compensation filter control method, confocal compensation filter control device, storage medium, and electronic device |
| CN112130302B (en) * | 2020-11-25 | 2021-03-02 | 深圳市海创光学有限公司 | Receiving lens system of multispectral laser radar |
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| JP2011175161A (en) * | 2010-02-25 | 2011-09-08 | Tamron Co Ltd | Zoom lens |
| CN104749756A (en) * | 2013-12-27 | 2015-07-01 | 福州开发区鸿发光电子技术有限公司 | Aspherical dual-waveband confocal zoom lianr |
| CN107436480A (en) * | 2017-09-15 | 2017-12-05 | 东莞市宇瞳光学科技股份有限公司 | Low cost starlight level athermal monitoring camera lens |
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| CN103777321B (en) * | 2013-09-06 | 2016-02-03 | 玉晶光电(厦门)有限公司 | Portable electronic devices and its optical imaging lens |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011175161A (en) * | 2010-02-25 | 2011-09-08 | Tamron Co Ltd | Zoom lens |
| CN104749756A (en) * | 2013-12-27 | 2015-07-01 | 福州开发区鸿发光电子技术有限公司 | Aspherical dual-waveband confocal zoom lianr |
| CN107436480A (en) * | 2017-09-15 | 2017-12-05 | 东莞市宇瞳光学科技股份有限公司 | Low cost starlight level athermal monitoring camera lens |
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