CN113219633A - Day and night dual-purpose wide-angle fixed-focus monitoring lens - Google Patents

Day and night dual-purpose wide-angle fixed-focus monitoring lens Download PDF

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CN113219633A
CN113219633A CN202110575995.4A CN202110575995A CN113219633A CN 113219633 A CN113219633 A CN 113219633A CN 202110575995 A CN202110575995 A CN 202110575995A CN 113219633 A CN113219633 A CN 113219633A
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lens
day
night
image side
focal length
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侯志军
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Shenzhen Kaili Photoelectric Co ltd
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Shenzhen Kaili Photoelectric Co ltd
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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
    • G02B13/004—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 four lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/006—Filter holders
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation

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Abstract

The invention discloses a day and night dual-purpose wide-angle fixed-focus monitoring lens, which is sequentially provided with a first lens, a second lens, a diaphragm, a third lens, a fourth lens and an optical filter from an object side to an image side, wherein the first lens and the fourth lens are negative focal power lenses, the second lens and the third lens are positive focal power lenses, the optical filter adopts a day and night dual-purpose double optical filter, the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the second lens are both convex surfaces, the object side surface and the image side surface of the third lens are both convex surfaces, and the object side surface and the image side surface of the fourth lens are respectively a concave surface and a convex surface; the dual-purpose dual-optical filter capable of switching day and night is adopted, so that the use requirements of day and night image resolution are met simultaneously, the wide-angle monitoring requirements are met, the high-low temperature analysis variable quantity is effectively corrected through the structural arrangement of the first lens to the fourth lens and the constraint of optical parameters, and the stable and reliable use requirements under different temperature conditions are met.

Description

Day and night dual-purpose wide-angle fixed-focus monitoring lens
Technical Field
The invention belongs to the technical field of optical imaging, and particularly relates to a day and night dual-purpose wide-angle fixed-focus monitoring lens.
Background
In recent years, with the increasing popularization of security monitoring facilities, the use demand of a monitoring lens is increased, and meanwhile, the requirement on the imaging quality of a monitoring camera is higher and higher. At present, the following problems mainly exist in the selection of the monitoring lens:
(1) in a night monitoring environment, the imaging definition is reduced in a low-illumination environment during lens imaging, light is supplemented by using a light source, and overexposure caused by light supplement reflection occurs in some special shooting environments, so that the problem of unclear detail shooting occurs; at present, the day and night resolution requirements can be met by using the day and night available fixed focus monitoring lens, but the currently used fixed focus monitoring lens usually adopts glass lenses, and the cost of the fixed focus monitoring lens needing a plurality of lenses is higher;
(2) the monitoring lens belongs to a precise instrument, the requirement on the temperature is strict, and the shooting quality and the performance of the monitoring lens are greatly influenced by the overhigh or overlow environmental temperature.
Therefore, how to effectively reduce the cost on the basis of ensuring the performance requirement of the monitoring lens is a problem to be solved urgently at present.
Disclosure of Invention
The invention aims to provide a day and night dual-purpose wide-angle fixed-focus monitoring lens which can meet the use requirements of day and night image resolution and high and low temperature environments, effectively corrects aberration in an optical system, and has the advantages of compact structure and low cost.
The technical scheme adopted by the invention is as follows:
a day and night dual-purpose wide-angle fixed-focus monitoring lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens and an optical filter, wherein the first lens, the second lens, the diaphragm, the third lens, the fourth lens and the optical filter are sequentially arranged from an object side to an image side;
the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the second lens are both convex surfaces, the object side surface and the image side surface of the third lens are both convex surfaces, and the object side surface and the image side surface of the fourth lens are respectively a concave surface and a convex surface;
the focal lengths of the first to fourth lenses satisfy the following condition:
0.5＜∣f1/f12∣＜1 (1)；
0.8＜∣f2/f12∣＜1.2 (2)；
0.2＜∣f3/f34∣＜0.5 (3)；
0.3＜∣f4/f34∣＜0.6 (4)；
in the formulae (1) to (4), f1Is the first lens focal length, f2Is the focal length of the second lens, f3Is the third lens focal length, f4Is the fourth lens focal length, f12Is the combined focal length of the first lens and the second lens, f34Is the combined focal length of the third lens and the fourth lens.
Further, the focal length of the lens optical system satisfies the following condition:
2＜∣f12/f∣＜3 (5)；
2＜∣f2/f∣＜3 (6)；
3＜∣f34/f∣＜4 (7)；
in the formulas (5) to (7), f is the focal length of the lens optical system.
Further, the | f1/f12| f is 0.65, | f2/f12| f is 1.05 |, and |, f3/f34| f is 0.33, | f4/f34| f is 0.44, | f12The value of/f is 2.45, | f2The value of/f is 2.57, | f34The value of/f | is 3.7.
Further, the chromatic aberration parameters of the first to fourth lenses satisfy the following conditions:
∣Vd1∣>50 (8)；
50＜∣Vd2∣＜65 (9)；
30＜∣Vd3-Vd4∣＜40 (10)；
0.08＜∣Nd3-Nd4∣＜0.2 (11)；
in the formulae (8) to (11), Vd1Is the first lens Abbe number, Vd2Is the second lens Abbe number, Vd3Is the third lens Abbe number, Vd4Is the fourth lens Abbe number, Nd3Is refractive index of the third lens, Nd4Is the fourth lens refractive index.
Further, the Vd1Value of 55.7, Vd2Value is 56.1, | Vd3-Vd4| is 34.2, | Nd3-Nd4| takes a value of 0.11.
Furthermore, the first lens, the second lens and the fourth lens are all plastic aspheric lenses, and the second lens is a glass spherical lens.
Further, the plastic aspheric lens satisfies the following conditions:
Figure BDA0003083639560000021
the meaning of the relevant parameters in equation (12) is as follows:
the depth of the X-aspheric surface in mm;
y-distance from the optical axis to the lens surface, i.e. height, in mm;
c-lens radius of curvature, and C1/R;
k-conic constant;
b, c, d, e, f, g, h-aspheric lens coefficient.
Further, the radii of curvature of the second to fourth lenses satisfy the following condition:
∣R2∣<3 (13)；
∣R6-R7∣＜0.4 (14)；
in the formula (13) and the formula (14), R2Is the image side radius of curvature, R, of the second lens6Is the image side radius of curvature, R, of the third lens7Is as followsFour lenses L4 object radius of curvature.
Further, the | -R2| R is 2.18, |6-R7| takes a value of 0.25.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the optical filter adopts dual-purpose optical filters capable of switching day and night, so that the use requirement of day and night resolution is met; meanwhile, the focal lengths of the first lens to the fourth lens are constrained, so that the use requirement of the wide-angle monitoring lens is met, the high-low temperature analysis variable quantity is effectively corrected, the stability and the reliability of the wide-angle monitoring lens are improved when the wide-angle monitoring lens is used under different temperature conditions, the structure is simple and compact, and the performance is excellent;
2. by carrying out condition limitation on values of the chromatic dispersion coefficient and the refractive index of the lens, the chromatic aberration of the lens can be effectively corrected, and the imaging quality is guaranteed;
3. the manufacturability of the lens can be effectively controlled by carrying out conditional limitation on the curvature radius value of the lens;
4. by combining the glass mirror surface and the plastic mirror surface, the manufacturing cost is effectively reduced on the premise of ensuring the imaging performance of the invention.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic view of spherical aberration of the lens at normal temperature in the embodiment.
Fig. 3 is a schematic diagram of astigmatism of a lens at normal temperature in an embodiment.
Fig. 4 is a schematic diagram of distortion of the lens at normal temperature in the embodiment.
Fig. 5 is a schematic diagram of Rayfan at normal temperature of the lens in the embodiment.
Fig. 6 is a schematic diagram of a spherical aberration of the lens at 80 ° in the embodiment.
Fig. 7 is a schematic diagram of the astigmatism of the lens at 80 ° in the embodiment.
Fig. 8 is a schematic diagram illustrating distortion of a lens at 80 ° in the embodiment.
Fig. 9 is a schematic diagram of Rayfan at 80 ° in the lens according to the embodiment.
The labels in the figure are: l1, first lens; l2, second lens; K. a diaphragm; l3, third lens; l4, fourth lens; IR. filter IR.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
Defining the left side as the object side and the right side as the image side, the invention comprises a first lens L1, a second lens L2, a stop K, a third lens L3, a fourth lens L4 and a filter IR, which are arranged in sequence from left to right.
The right side of the optical filter IR is sequentially provided with protective glass and an imaging surface at the image side, and the optical filter IR is positioned between the lens group and the imaging surface and is mainly used for filtering out unwanted light rays. In order to meet the requirement of day and night use, the filter IR employs dual filters, and this embodiment takes IR-CUT dual filters as an example for explanation. When the visible light is sufficient in the daytime, the visible light in the range of 400 nm-700 nm penetrates through the infrared CUT filter of the IR-CUT double filters, and infrared rays except 700nm are filtered; when the visible light is insufficient at night, the infrared CUT filter of the IR-CUT double filters is removed and switched to the full-transmission spectrum filter, so that the light rays in the range of 400nm to 1000nm can be transmitted through the lens for imaging.
By using the double optical filters, the use requirements under different light environments at day and night are met, and the optical filter has excellent optical performance.
The first lens L1 is a negative power lens, and the object-side surface and the image-side surface of the first lens L1 are respectively convex and concave; the second lens L2 is a positive power lens, and both the object-side surface and the image-side surface of the second lens L2 are convex surfaces; the third lens L3 is a positive power lens, and both the object-side surface and the image-side surface of the third lens L3 are convex surfaces; the fourth lens L4 is a negative power lens, and the object-side surface and the image-side surface of the fourth lens L4 are concave and convex, respectively.
The focal lengths of the first lens L1 to the fourth lens L4 and the lens optical system focal length satisfy the following conditions:
0.5＜∣f1/f12∣＜1 (1)；
0.8＜∣f2/f12∣＜1.2 (2)；
0.2＜∣f3/f34∣＜0.5 (3)；
0.3＜∣f4/f34∣＜0.6 (4)；
2＜∣f12/f∣＜3 (5)；
2＜∣f2/f∣＜3 (6)；
3＜∣f34/f∣＜4 (7)；
in the formulae (1) to (7), f1Is the focal length, f, of the first lens L12Is the focal length, f, of the second lens L23Is the focal length, f, of the third lens L34Is the focal length, f, of the fourth lens L412Is the combined focal length, f, of the first lens L1 and the second lens L234Is the combined focal length of the third lens L3 and the fourth lens L4, and f is the lens optical system focal length.
In this embodiment, preferably | f1/f12| f is 0.65, | f2/f12| f is 1.05 |, and |, f3/f34| f is 0.33, | f4/f34| f is 0.44, | f12The value of/f is 2.45, | f2The value of/f is 2.57, | f34The value of/f | is 3.7.
The focal length of the lens is determined by the structures of the two surfaces of the object side and the image side of the lens, and the focal length of the lens can reflect the overall situation of the combined two surfaces of the object side and the image side of the lens, which is a structural parameter of the lens. After the limiting conditions for the focal length of the lens in the formulas (1) to (7) are met, the variable quantity of high-temperature and low-temperature analysis can be effectively corrected, and stable and reliable imaging under different environmental temperatures is realized.
In order to eliminate the dispersion phenomenon during lens imaging, the invention performs the following conditions on the dispersion coefficient and the refractive index of the first lens L1 to the fourth lens L4:
∣Vd1∣>50 (8)；
50＜∣Vd2∣＜65 (9)；
30＜∣Vd3-Vd4∣＜40 (10)；
0.08＜∣Nd3-Nd4∣＜0.2 (11)；
in the formulae (8) to (11), Vd1Is the first lens L1 Abbe number, Vd2Is the second lens L2 Abbe number, Vd3Is the third lens L3 Abbe number, Vd4Is the fourth lens L4 Abbe number, Nd3Refractive index of the third lens L3, Nd4The refractive index of the fourth lens L4.
In this embodiment, V is preferabled1Value of 55.7, Vd2Value is 56.1, | Vd3-Vd4| is 34.2, | Nd3-Nd4| takes a value of 0.11.
The chromatic aberration of the monitoring lens is effectively corrected through the condition constraints from the formula (8) to the formula (11), and the imaging quality of the monitoring lens is improved.
In order to improve the manufacturability at the time of lens production, the radii of curvature of the second lens L2 through the fourth lens L4 satisfy the following conditions:
∣R2∣<3 (13)；
∣R6-R7∣＜0.4 (14)；
in the formula (13) and the formula (14), R2Is the image side radius of curvature, R, of the second lens L26Is the image side radius of curvature, R, of the third lens L37Is the object curvature radius of the fourth lens L4. This embodiment prefers | R2| R is 2.18, |6-R7| takes a value of 0.25.
The technical effect of the invention is verified by specific experimental data as follows:
the basic lens data employed in this example are shown in table 1:
table 1:
Figure BDA0003083639560000051
in the context of table 1, the following,L1R1 is an object plane of the first lens L1, L1R2 is an image plane of the first lens L1, L2R1 is an object plane of the second lens L2, L2R2 is an image plane of the second lens L2, L3R1 is an object plane of the third lens L3, L3R2 is an image plane of the third lens L3, L4R1 is an object plane of the fourth lens L4, and L4R2 is an image plane of the fourth lens L4; the curvature radius R represents the value of the curvature radius of the corresponding surface, the surface interval D represents the lens thickness of the corresponding surface or the interval value between the lenses, and the refractive index NdThe refractive index of the lens with respect to d-light (wavelength 587.6nm) and Abbe constant V are showndThe abbe constant of the lens with respect to d-light is shown.
The first lens L1, the second lens L2, and the fourth lens L4 are plastic aspheric lenses, the second lens L2 is a glass spherical lens, and coefficients of the aspheric lenses are based on the center of the lens surface and the optical axis is the x axis.
The plastic lens and the glass lens are combined for use, so that the imaging performance is ensured, and the equipment cost is effectively reduced.
Wherein, the plastic aspheric lens satisfies the following conditions:
Figure BDA0003083639560000061
the meaning of the relevant parameters in equation (12) is as follows:
the depth of the X-aspheric surface in mm;
y-distance from the optical axis to the lens surface, i.e. height, in mm;
c-lens radius of curvature, and C1/R;
k-conic constant;
b, c, d, e, f, g, h-aspheric lens coefficient.
Specific parameters of the aspherical lens coefficients are shown in table 2:
table 2:
K b c d
L1R1 0.597220042867282 -0.001689001018993 0.000021806616369 0.000000000609716
L1R2 -0.840850976092939 0.001470295616537 0.000083336652987 -0.000025357250158
L3R1 8.056760369753440 -0.006673363718930 -0.001265 0.000032850436933
L3R2 -1.031703738984840 0.004368325298727 -0.001063 0.000054101924366
L4R1 -2.180973074455550 0.019596189320481 -0.005455 0.001071472936760
L4R2 -24.309121520048200 0.019196774003023 -0.00387 0.000641902654563
e f g h
L1R1 -0.000000000943379 -0.000000000031715 0 0
L1R2 0.000001328629593 0.000000036644801 0 0
L3R1 -0.000073961511072 0.000001868952051 0.000000600614343 -0.000000450087488
L3R2 -0.000014544603372 0.000000389963011 -0.000000631686595 0.000000082751368
L4R1 -0.000085029264545 -0.000002669906212 0.000000128410526 0.000000069667489
L4R2 -0.000063146620766 0.000002406527809 0.000000245279401 -0.000000053100949
the present example was tested at room temperature using the parameters in tables 1 and 2 and recorded with the phase difference diagram, and fig. 2 to 5 are the spherical aberration diagram, astigmatism diagram, distortion diagram and Rayfan diagram at room temperature in this order.
Since the ambient temperature may cause the temperature of the lens to become lower or higher, in order to verify the stability of the imaging effect of the present embodiment at different ambient temperatures, the present embodiment is tested at a high temperature of 80 ℃ and aberration diagrams are recorded, and fig. 6 to 9 are a spherical aberration diagram, an astigmatic diagram, a distortion diagram and a Rayfan diagram at the wide angle end at the high temperature of 80 ℃.
The optical system parameters are shown in table 3:
table 3:
f FNO. 2ω TTL
3.14 2.1 130° 22.3
in Table 3, f denotes paraxial focal length in mm; fno represents a lens aperture value; 2 ω denotes a viewing angle, ω denotes a half viewing angle; TTL means the total optical length in mm.
The four-lens structure is adopted, the first lens L1, the third lens L3 and the fourth lens L4 are all plastic aspheric lenses, the second lens L2 is a glass spherical lens, and the obtained fixed-focus monitoring lens has the advantages of being ultra wide in angle, compact in structure, high and low in temperature of-40-80 ℃ and available day and night, can effectively correct aberration in an optical system, is lower in cost compared with the fixed-focus lens in the prior art, and is suitable for security monitoring equipment.
Meanwhile, as can be seen from the experimental results of fig. 2 to 9, various aberrations of the present embodiment are well corrected, the stability of the imaging effect can be ensured under different environmental temperatures, and the present embodiment has a good market prospect, and is suitable for wide popularization in the industry of security monitoring devices.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The utility model provides a dual-purpose wide angle tight shot of day night which characterized in that: the optical filter comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens and an optical filter which are sequentially arranged from an object side to an image side, wherein the first lens and the fourth lens are negative focal power lenses, the second lens and the third lens are positive focal power lenses, and the optical filter adopts a dual-purpose optical filter for day and night;
the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface, the object side surface and the image side surface of the second lens are both convex surfaces, the object side surface and the image side surface of the third lens are both convex surfaces, and the object side surface and the image side surface of the fourth lens are respectively a concave surface and a convex surface;
the focal lengths of the first to fourth lenses satisfy the following condition:
0.5＜∣f1/f12∣＜1 (1)；
0.8＜∣f2/f12∣＜1.2 (2)；
0.2＜∣f3/f34∣＜0.5 (3)；
0.3＜∣f4/f34∣＜0.6 (4)；
in the formulae (1) to (4), f1Is the first lens focal length, f2Is the focal length of the second lens, f3Is the third lens focal length, f4Is the fourth lens focal length, f12Is the combined focal length of the first lens and the second lens, f34Is the combined focal length of the third lens and the fourth lens.
2. The day and night wide-angle fixed-focus monitoring lens as claimed in claim 1, wherein: the focal length of the lens optical system meets the following conditions:
2＜∣f12/f∣＜3 (5)；
2＜∣f2/f∣＜3 (6)；
3＜∣f34/f∣＜4 (7)；
in the formulas (5) to (7), f is the focal length of the lens optical system.
3. The dual-purpose day and night pantone of claim 2Burnt monitoring camera lens, its characterized in that: the | f1/f12| f is 0.65, | f2/f12| f is 1.05 |, and |, f3/f34| f is 0.33, | f4/f34| f is 0.44, | f12The value of/f is 2.45, | f2The value of/f is 2.57, | f34The value of/f | is 3.7.
4. The day and night wide-angle fixed-focus monitoring lens as claimed in claim 1, wherein: the chromatic aberration parameters of the first lens to the fourth lens satisfy the following conditions:
∣Vd1∣>50 (8)；
50＜∣Vd2∣＜65 (9)；
30＜∣Vd3-Vd4∣＜40 (10)；
0.08＜∣Nd3-Nd4∣＜0.2 (11)；
in the formulae (8) to (11), Vd1Is the first lens Abbe number, Vd2Is the second lens Abbe number, Vd3Is the third lens Abbe number, Vd4Is the fourth lens Abbe number, Nd3Is refractive index of the third lens, Nd4Is the fourth lens refractive index.
5. The day and night wide-angle fixed-focus monitoring lens according to claim 4, characterized in that: the V isd1Value of 55.7, Vd2Value is 56.1, | Vd3-Vd4| is 34.2, | Nd3-Nd4| takes a value of 0.11.
6. The day and night wide-angle fixed-focus monitoring lens as claimed in claim 1, wherein: the first lens, the second lens and the fourth lens are all plastic aspheric lenses, and the second lens is a glass spherical lens.
7. The day and night wide-angle fixed-focus monitoring lens as claimed in claim 6, wherein: the plastic aspheric lens meets the following conditions:
Figure FDA0003083639550000021
the meaning of the relevant parameters in equation (12) is as follows:
the depth of the X-aspheric surface in mm;
y-distance from the optical axis to the lens surface, i.e. height, in mm;
c-lens radius of curvature, and C1/R;
k-conic constant;
b, c, d, e, f, g, h-aspheric lens coefficient.
8. The day and night wide-angle fixed-focus monitoring lens as claimed in claim 1, wherein: the radii of curvature of the second to fourth lenses satisfy the following condition:
∣R2∣<3 (13)；
∣R6-R7∣＜0.4 (14)；
in the formula (13) and the formula (14), R2Is the image side radius of curvature, R, of the second lens6Is the image side radius of curvature, R, of the third lens7Is the object radius of curvature of the fourth lens L4.
9. The day and night wide-angle fixed-focus monitoring lens according to claim 8, characterized in that: the | R2| R is 2.18, |6-R7| takes a value of 0.25.
CN202110575995.4A 2021-05-25 2021-05-25 Day and night dual-purpose wide-angle fixed-focus monitoring lens Pending CN113219633A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114355559A (en) * 2021-12-29 2022-04-15 福建福光股份有限公司 Large-aperture high-resolution optical lens
CN114415341A (en) * 2022-03-08 2022-04-29 惠州市星聚宇光学有限公司 Monitoring lens and monitoring lens module
CN114609761A (en) * 2022-02-23 2022-06-10 广东弘景光电科技股份有限公司 Large-aperture wide-angle monitoring optical system with high-pixel large target surface and camera module applied to same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114355559A (en) * 2021-12-29 2022-04-15 福建福光股份有限公司 Large-aperture high-resolution optical lens
CN114609761A (en) * 2022-02-23 2022-06-10 广东弘景光电科技股份有限公司 Large-aperture wide-angle monitoring optical system with high-pixel large target surface and camera module applied to same
CN114415341A (en) * 2022-03-08 2022-04-29 惠州市星聚宇光学有限公司 Monitoring lens and monitoring lens module

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