CN116449528A - Fixed focus lens and intelligent door lock - Google Patents
Fixed focus lens and intelligent door lock Download PDFInfo
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- CN116449528A CN116449528A CN202310235442.3A CN202310235442A CN116449528A CN 116449528 A CN116449528 A CN 116449528A CN 202310235442 A CN202310235442 A CN 202310235442A CN 116449528 A CN116449528 A CN 116449528A
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- lens
- fixed focus
- focus lens
- focal power
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- 230000003287 optical effect Effects 0.000 claims abstract description 25
- 238000003384 imaging method Methods 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 15
- 239000006059 cover glass Substances 0.000 claims 2
- 230000004075 alteration Effects 0.000 description 16
- 239000006185 dispersion Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 201000009310 astigmatism Diseases 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The invention discloses a fixed-focus lens and an intelligent door lock, wherein the fixed-focus lens is provided with an object side and an image side which are oppositely arranged along the optical axis direction, the fixed-focus lens comprises a first lens with negative focal power, a second lens with positive or negative focal power, a diaphragm, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power, which are sequentially arranged from the object side to the image side, and the fixed-focus lens meets the following conditions: 0.97 < |f1/f| < 1.82, 7.2 < |f2/f| < 13.4, 1.1 < |f3/f| < 2.1, 1.1 < |f4/f| < 2.1, and 1.0 < |f5/f| < 2.0, the aperture value F of the fixed focus lens satisfies 1.8.ltoreq.F.ltoreq.2.2, the fixed focus lens can clearly image under weak light, the lens is not defocused under high and low temperature environment conditions by reasonably setting the focal length ratio, the working performance is more stable, the angle of view is larger than 170 degrees, and the view is wide, so as to provide a fixed focus lens with low cost, small volume, large aperture and high definition supporting day and night confocal.
Description
Technical Field
The invention relates to the technical field of optics, in particular to a fixed-focus lens and an intelligent door lock.
Background
In recent years, a fixed focus lens plays an increasing role in the intelligent home industry and is widely applied to home such as refrigerators and door locks. Along with the increasing development of intelligent door locks, the requirements on the intelligent door lock lens are higher and higher, and the requirements on resolution, volume and aperture are mainly reflected.
The current intelligent door lock lens has higher cost, low definition and no support for day and night confocal.
Disclosure of Invention
The invention mainly aims to provide a fixed-focus lens and an intelligent door lock, and aims to provide a high-definition fixed-focus lens which is low in cost, small in size, large in aperture and capable of supporting day-night confocal.
In order to achieve the above object, the present invention provides a fixed focus lens, which has an object side and an image side that are disposed opposite to each other along an optical axis direction, the fixed focus lens includes a first lens with negative focal power, a second lens with positive or negative focal power, a diaphragm, a third lens with positive focal power, a fourth lens with negative focal power, and a fifth lens with positive focal power, which are disposed in order from the object side to the image side, and the fixed focus lens satisfies the following conditions:
0.97 < |f1/f| < 1.82 and 7.2 < |f2/f| < 13.4 and 1.1 < |f3/f| < 2.1 and 1.1 < |f4/f| < 2.1 and 1.0 < |f5/f| < 2.0;
wherein f is the total focal length of the fixed focus lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.
Optionally, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface;
the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface.
Optionally, the first lens and the third lens are glass spherical lenses;
the second lens, the fourth lens and the fifth lens are plastic aspheric lenses.
Optionally, the diaphragm and the fixed focus lens meet the following conditions: SD/TTL is more than 0.5 and less than 0.94;
wherein SD is the distance between the aperture and the imaging surface of the fixed focus lens on the optical axis, and TTL is the total optical length of the fixed focus lens.
Optionally, the total optical length of the fixed focus lens is 9 < TTL < 17.
Optionally, the fixed focus lens meets the following conditions: 3.7< TTL/f <7; wherein TTL is the total optical length of the fixed focus lens.
Optionally, the fourth lens has an abbe number vd4 that satisfies: 20 < vd4 < 40.
Optionally, the dispersion coefficient vd5 of the fifth lens satisfies: 40 < vd5 < 70.
Optionally, the fixed focus lens further includes a protective glass and a photosensitive chip sequentially from the object side to the image side, where the protective glass and the photosensitive chip are disposed on a side of the fifth lens close to the image side.
The invention also provides an intelligent door lock, which comprises the fixed focus lens.
In the technical scheme provided by the invention, a first lens with negative focal power, a second lens with positive focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with positive focal power are sequentially arranged from an object side to an image side, and the fixed focus lens meets the following conditions: 0.97 < |f1/f| < 1.82, 7.2 < |f2/f| < 13.4, 1.1 < |f3/f| < 2.1, 1.1 < |f4/f| < 2.1, and 1.0 < |f5/f| < 2.0, the first lens with negative focal power is arranged, the effect of collecting light rays is achieved for a large-view-field optical system, axial chromatic aberration is corrected, the lens volume can be reduced through the second lens with positive or negative focal power, the astigmatism outside an axis is corrected, the diaphragm is used for adjusting light flux according to actual conditions, imaging quality can be improved, the third lens can correct system chromatic aberration, imaging performance of the optical system at high and low temperatures is guaranteed, the chromatic aberration, spherical aberration and image surface bending of the system can be corrected through the fourth lens and the fifth lens, the focal power and the shape are reasonably arranged, the focal power can be controlled to be more compact than the focal power, the focal power can be provided at a certain focal size under a certain condition, the focal power is less than the focal power is more stable than that of the focal power is provided at a focal power of 8, and the focal power is more stable than the focal power is provided at a focal power of less than 2 at a certain value of 8, and the focal power is more stable than the focal power is provided at a focal power of a low-view-field, and the focal power is provided at a focal power of less than 1 at a focal power of a focal value of less than 1 at a focal angle at a higher temperature at the focal angle at the night at the temperature.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a fixed focus lens provided by the invention;
FIG. 2 is a schematic diagram of a spherical aberration curve of the fixed focus lens of FIG. 1;
FIG. 3 is a schematic view of a light fan of the fixed focus lens of FIG. 1;
fig. 4 is a schematic view of field distortion/curvature of field of the fixed focus lens in fig. 1.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 1 | First lens | 5 | Fifth lens |
| 2 | Second lens | 6 | Diaphragm |
| 3 | Third lens | 7 | Protective glass |
| 4 | Fourth lens | 8 | Photosensitive chip |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
In recent years, a fixed focus lens plays an increasing role in the intelligent home industry and is widely applied to home such as refrigerators and door locks. Along with the increasing development of intelligent door locks, the requirements on the intelligent door lock lens are higher and higher, and the requirements on resolution, volume and aperture are mainly reflected. The current intelligent door lock lens has higher cost, low definition and no support for day and night confocal.
In order to solve the above-mentioned problems, the present invention provides a fixed-focus lens, and fig. 1 to fig. 4 are specific embodiments of the fixed-focus lens provided by the present invention.
Referring to fig. 1, the fixed focus lens has an object side and an image side disposed opposite to each other along an optical axis, the fixed focus lens includes a first lens 1 with negative focal power, a second lens 2 with positive or negative focal power, a diaphragm 6, a third lens 3 with positive focal power, a fourth lens 4 with negative focal power, and a fifth lens 5 with positive focal power, which are disposed in order from the object side to the image side, and the fixed focus lens satisfies the following conditions: 0.97 < |f1/f| < 1.82 and 7.2 < |f2/f| < 13.4 and 1.1 < |f3/f| < 2.1 and 1.1 < |f4/f| < 2.1 and 1.0 < |f5/f| < 2.0; wherein f is the total focal length of the fixed focus lens, f1 is the focal length of the first lens 1, f2 is the focal length of the second lens 2, f3 is the focal length of the third lens 3, f4 is the focal length of the fourth lens 4, and f5 is the focal length of the fifth lens 5.
In the technical scheme provided by the invention, a first lens 1 with negative focal power, a second lens 2 with positive focal power, a third lens 3 with positive focal power, a fourth lens 4 with negative focal power and a fifth lens 5 with positive focal power are sequentially arranged from an object side to an image side, wherein the fixed focus lens meets the following conditions: 1.2 < |f1/f| < 2.0, 3 < |f2/f| < 10, 1.2 < |f3/f| < 2.5, 0.8 < |f4/f| < 2.0, and 0.8 < |f5/f| < 2.0, by setting the first lens 1 with negative focal power, the lens can collect light for a large-view-field optical system, correct axial chromatic aberration, by setting the second lens 2 with positive or negative focal power, the lens volume can be reduced, the off-axis astigmatism can be corrected, the diaphragm 6 is used for adjusting luminous flux according to actual conditions, imaging quality can be improved, the third lens 3 can correct system chromatic aberration, and ensure imaging performance of the optical system at high and low temperatures, through setting up fourth lens 4 with fifth lens 5 can correct systematic chromatic aberration and spherical aberration and image surface crooked, through the optical power of five lenses and the reasonable setting of shape, make the fixed focus camera lens can control light trend well, make the structure compacter when introducing more light, make fixed focus camera lens's aperture value F satisfy 1.8 and be less than or equal to 2.2, fixed focus camera lens also can clearly image under the dim light, and through rationally setting for focal length ratio makes camera lens not defocus under high low temperature environment condition, and working property is more stable, and the angle of vision is greater than 170, and the field of vision is wide to provide a low-cost, small, big light ring, support confocal high definition fixed focus camera lens of day night.
Specifically, in an embodiment, the object side surface of the first lens element 1 is a convex surface, and the image side surface of the first lens element 1 is a concave surface; the object side surface of the second lens element 2 is concave, and the image side surface of the second lens element 2 is convex; the object side surface of the third lens element 3 is convex, and the image side surface of the third lens element 3 is convex; the object side surface of the fourth lens element 4 is a concave surface, and the image side surface of the fourth lens element 4 is a concave surface; the object side surface of the fifth lens element 5 is convex, and the image side surface of the fifth lens element 5 is convex.
More specifically, in a specific embodiment, the first lens 1 and the third lens 3 are glass spherical lenses; the second lens 2, the fourth lens 4 and the fifth lens 5 are plastic aspheric lenses, and the plastic aspheric lenses can be used for effectively controlling the cost due to the fact that the impact resistance of the resin lens is strong, the weight is light, and meanwhile the cost is low. If all plastic aspheric lenses are adopted, the plastic material is easily affected by the environmental temperature, so that the chemical characteristics of the fixed focus lens are unstable, the refractive index of the fixed focus lens is weaker than that of the all-glass lens, and the picture reduction degree is inferior to that of the all-glass lens, so as to ensure the stability of the fixed focus lens under the temperature change, in the embodiment, the first lens 1 and the third lens 3 are glass spherical lenses. The glass lens is not easy to be influenced by expansion caused by heat and contraction caused by cold, so that the glass lens can well resist the problem of thermal deformation of the fixed-focus lens in a high-low temperature environment, and the high precision of the lens is maintained for a long time. The aberration generated during imaging can be eliminated as much as possible, so that the imaging quality of the fixed-focus lens is improved, and the influence of temperature on the optical performance of the lens can be reduced. The fixed focus lens is made of glass-plastic mixed materials, so that the cost is saved, the shock resistance is high, and the stability of the system and the applicability of high and low temperatures are ensured.
Specifically, in the present embodiment, the diaphragm 6 and the fixed focus lens satisfy the following conditions: SD/TTL is more than 0.5 and less than 0.94; wherein SD is the distance between the diaphragm 6 and the imaging surface of the fixed focus lens on the optical axis, and TTL is the total optical length of the fixed focus lens.
Specifically, in this embodiment, the total optical length of the fixed focus lens is 9 < TTL < 17. Therefore, more light rays are introduced, the fixed focus lens is compact in structure and small in size, and the fixed focus lens meets the miniaturization characteristic of an intelligent door lock.
More specifically, the fixed focus lens satisfies the following conditions: 3.7< TTL/f <7; wherein TTL is the total optical length of the fixed focus lens.
Specifically, in the present embodiment, the dispersion coefficient vd4 of the fourth lens 4 satisfies: 20 < vd4 < 40.
Specifically, in the present embodiment, the dispersion coefficient vd5 of the fifth lens 5 satisfies: 40 < vd5 < 70. The larger the dispersion coefficient (abbe number), the less obvious the dispersion, the better the imaging quality of the lens, and each lens in the embodiment controls the dispersion coefficient to be a higher value, so that the dispersion of the fixed focus lens is less obvious, and the imaging quality of the lens is good.
Further, in this embodiment, the fixed focus lens further includes a protective glass 7 and a photosensitive chip 8 in order from the object side to the image side, where the protective glass 7 and the photosensitive chip 8 are disposed on a side of the fifth lens 5 near the image side. The protection glass 7 can provide effective protection for the photosensitive chip IMAGE, the protection glass 7 can be arranged as an optical filter, and the optical filter can effectively filter stray light of a non-working wave band so as to reduce optical noise and reduce difficulty for a subsequent photoelectric module processing part, thereby improving imaging quality. It will be appreciated that the surface of the photosensitive chip 8 facing the object side is an imaging surface.
Specifically, the imaging surface may be understood as a surface of the photosensitive chip 8 facing the object side, that is, a surface of an imaging element such as a CCD or a CMOS, and it may be understood that light carrying subject information may sequentially pass through the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, and the fifth lens 5 and finally be imaged on the imaging surface.
Specifically, in this embodiment, the refractive index, the radius of curvature and the thickness interval of the lens material are shown in table 1 below:
TABLE 1
Specifically, in the present embodiment, the second lens 2, the fourth lens 4, and the fifth lens 5 are aspherical lenses. The aspherical lens is characterized in that: the curvature continuously varies from the lens center to the lens periphery, and unlike a spherical lens having a constant curvature from the lens center to the lens periphery, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. And the chromatic aberration of the lens can be well corrected through the aspheric lens, and under the condition of guaranteeing the control of the purple side of the lens, the spherical aberration and the sine difference at the high-power position are corrected at the same time.
Further, in the present embodiment, the aspherical surface shape of the aspherical lens satisfies the following condition:
wherein c is the curvature corresponding to the radius, y is the radial coordinate (the unit is the same as the unit of the lens length), k is the conic coefficient, (the surface shape curve is hyperbolic when the k coefficient is smaller than-1, parabola when the k coefficient is equal to-1, ellipse when the k coefficient is between-1 and 0, circle when the k coefficient is equal to 0, oblate when the k coefficient is larger than 0), a1, a2, a3, a4, a5, a6, a7 are the higher aspheric coefficients (please refer to the following table 2), and the shape and size of the aspheric surfaces of the object side and the image side of the lens can be set through the parameters.
Table 2 conical coefficients and aspherical coefficients for aspherical lenses:
fig. 2 is a schematic diagram of a spherical aberration curve of an embodiment of a fixed focus lens according to the present invention, fig. 3 is a schematic diagram of a light fan of an embodiment of a fixed focus lens according to the present invention, and fig. 4 is a schematic diagram of field distortion/field curvature of an embodiment of a fixed focus lens according to the present invention.
As can be seen from the above figures, the spherical aberration, curvature of field, and distortion of the fixed focus lens in the present embodiment can be well corrected.
In summary, the aperture value F of the fixed-focus lens satisfies 1.8-2.2, and the lens is not out of focus at high and low temperatures, and the angle of view can reach 170 degrees.
The invention also provides an intelligent door lock, which comprises the fixed-focus lens according to the technical scheme, and the specific structure of the fixed-focus lens refers to the embodiment, and because the fixed-focus lens of the fixed-focus lens adopts all the technical schemes of all the embodiments, the intelligent door lock at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The utility model provides a decide burnt camera lens for intelligent lock, its characterized in that, decide burnt camera lens has and is relative object side and the image side that sets up along the optical axis direction, decide burnt camera lens and include from the object side to the first lens that the focal power is negative, the focal power is positive or negative second lens, diaphragm, the focal power is positive third lens, the focal power is negative fourth lens, the focal power is positive fifth lens, decide burnt camera lens satisfies following condition:
0.97 < |f1/f| < 1.82 and 7.2 < |f2/f| < 13.4 and 1.1 < |f3/f| < 2.1 and 1.1 < |f4/f| < 2.1 and 1.0 < |f5/f| < 2.0;
wherein f is the total focal length of the fixed focus lens, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, and f5 is the focal length of the fifth lens.
2. The fixed focus lens of claim 1, wherein an object side surface of the first lens element is convex and an image side surface of the first lens element is concave;
the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface;
the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface;
the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a concave surface;
the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface.
3. The fixed focus lens of claim 1, wherein the first lens and the third lens are glass spherical lenses;
the second lens, the fourth lens and the fifth lens are plastic aspheric lenses.
4. The fixed focus lens of claim 1, wherein the diaphragm and the fixed focus lens satisfy the following conditions: SD/TTL is more than 0.5 and less than 0.94;
wherein SD is the distance between the aperture and the imaging surface of the fixed focus lens on the optical axis, and TTL is the total optical length of the fixed focus lens.
5. The fixed focus lens of claim 1 wherein the fixed focus lens has an optical total length 9 < TTL < 17.
6. The fixed focus lens of claim 1, wherein the fixed focus lens satisfies the following condition: 3.7< TTL/f <7; wherein TTL is the total optical length of the fixed focus lens.
7. The fixed focus lens of claim 1 wherein the fourth lens has an abbe number vd4 that satisfies: 20 < vd4 < 40.
8. The fixed focus lens of claim 1 wherein the fifth lens has an abbe number vd5 that satisfies: 40 < vd5 < 70.
9. The fixed focus lens of claim 1, further comprising a cover glass and a photosensitive chip in order from an object side to an image side, wherein the cover glass and the photosensitive chip are disposed on a side of the fifth lens close to the image side.
10. An intelligent door lock, characterized in that the fixed focus lens of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235442.3A CN116449528A (en) | 2023-03-10 | 2023-03-10 | Fixed focus lens and intelligent door lock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235442.3A CN116449528A (en) | 2023-03-10 | 2023-03-10 | Fixed focus lens and intelligent door lock |
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| CN116449528A true CN116449528A (en) | 2023-07-18 |
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| CN202310235442.3A Pending CN116449528A (en) | 2023-03-10 | 2023-03-10 | Fixed focus lens and intelligent door lock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117806009A (en) * | 2024-02-29 | 2024-04-02 | 江西联益光学有限公司 | Day and night confocal lens |
| CN117806009B (en) * | 2024-02-29 | 2024-06-11 | 江西联益光学有限公司 | Day and night confocal lens |
-
2023
- 2023-03-10 CN CN202310235442.3A patent/CN116449528A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117806009A (en) * | 2024-02-29 | 2024-04-02 | 江西联益光学有限公司 | Day and night confocal lens |
| CN117806009B (en) * | 2024-02-29 | 2024-06-11 | 江西联益光学有限公司 | Day and night confocal lens |
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