CN110927937B - Day and night dual-purpose large-light-transmission fixed focus lens with black light level of 4mm and assembly method thereof - Google Patents
Day and night dual-purpose large-light-transmission fixed focus lens with black light level of 4mm and assembly method thereof Download PDFInfo
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- CN110927937B CN110927937B CN202010015218.XA CN202010015218A CN110927937B CN 110927937 B CN110927937 B CN 110927937B CN 202010015218 A CN202010015218 A CN 202010015218A CN 110927937 B CN110927937 B CN 110927937B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005499 meniscus Effects 0.000 claims abstract description 77
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims description 14
- 230000014509 gene expression Effects 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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- 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
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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
- G02B13/18—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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- 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
- G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
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Abstract
The invention relates to a 4mm black light level day and night dual-purpose light-transmitting fixed focus lens and an assembly method thereof, wherein an optical system of the lens comprises a front lens group A with negative focal power and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path, and the front lens group A comprises a negative meniscus lens A-1, a negative meniscus lens A-2 and a biconvex lens A-3, which are sequentially arranged from front to back; the rear lens group B comprises a positive meniscus lens B-1, a bonding lens group, a biconvex lens B-3, a biconcave lens B-4 and a biconvex lens B-5 which are sequentially arranged from front to back and are closely connected. The vertex angle lens has the advantages of simple structure, reasonable design, low manufacturing cost, short total length of the light path, small volume and good imaging quality; the F value is extremely small, the light quantity of the lens is improved, the whole picture can be brighter, the lens can better perform in a low-illumination environment, a clearer imaging effect is presented, and the day and night universal function is realized.
Description
Technical Field
The invention relates to a 4mm black light level day and night large-light-transmission fixed focus lens and an assembly method thereof, and belongs to the technical field of optical devices.
Background
With the rapid development of the camera lens market, in recent years, a miniature camera lens which is standardized and stable and can be matched with a camera is formed, under the condition of stable lens imaging, the requirements of clients on the light flux of the lens are continuously increased, and the security and protection lens in the current market has the problems of small light flux and insufficient imaging.
Disclosure of Invention
Therefore, the invention aims to provide the 4mm black light level day and night large-light-passing fixed-focus lens with small volume, large light-passing quantity and good imaging quality and the assembly method thereof.
The invention is realized by adopting the following scheme: the optical system of the lens consists of a front lens group A with negative focal power and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path, wherein the front lens group A consists of a negative meniscus lens A-1, a negative meniscus lens A-2 and a biconvex lens A-3, which are sequentially arranged from front to back; the rear lens group B consists of a cemented lens group, a biconvex lens B-3, a biconcave lens B-4 and a biconvex lens B-5 which are sequentially arranged from front to back and are closely connected with each other; a diaphragm C is arranged between the front lens group A and the rear lens group B, the air interval between the front lens group A and the rear lens group B is 1.3mm, the air interval between the negative meniscus lens A-1 and the negative meniscus lens A-2 is 3.1mm, the air interval between the negative meniscus lens A-2 and the biconvex lens A-3 is 0.05mm, the air interval between the biconvex lens B-2 and the biconvex lens B-3 is 0.07mm, the air interval between the biconvex lens B-3 and the biconcave lens B-4 is 0.51mm, and the air interval between the biconcave lens B-4 and the biconvex lens B-5 is 0.06mm.
Further, the negative meniscus lens A-1 is a glass spherical lens, the negative meniscus lens A-2 is a plastic aspherical lens, the biconvex lens A-3 is a glass spherical lens, the negative meniscus lens B-1 is a glass spherical lens, the biconvex lens B-2 is a glass spherical lens, the biconvex lens B-3 is a plastic aspherical lens, the biconcave lens B-4 is a plastic aspherical lens, and the biconvex lens B-5 is a plastic aspherical lens.
Further, the focal length f, refractive index n and radius of curvature R of eight lenses of the negative meniscus lens A-1, negative meniscus lens A-2, biconvex lens A-3, negative meniscus lens B-1, biconvex lens B-2, biconvex lens B-3, biconcave lens B-4 and biconvex lens B-5 satisfy the following relation:
-9.14≤f1≤-5.25，-13.5≤f2≤-8.5，f3=12.75，f4=-17.144，f5=7.61，8.1≤f6≤11.15，-8.1≤f7≤-4.15，5.1≤f8≤9.15；
1.45≤n1≤1.72，1.5≤n2≤1.75，1.8≤n3≤1.96，1.5≤n4≤1.75，1.4≤n5≤1.65，1.4≤n6≤1.65，1.6≤n7≤1.75，1.4≤n8≤1.65；
380≤R1≤480，-5≤R3≤-1.3，20.2≤R5≤28.25，23.14≤R7≤38.25，5.14≤R9≤9.2，5.14≤R11≤8.25，-2.14≤R13≤-5.25，4.14≤R15≤8.25，2.1≤R2≤5.25, -8.14≤R4≤-4.25, -28.51≤R6≤-20.2, 6.14≤R8≤9.25, -9.14≤R10≤-6.52,-18.14≤R12≤-9.31,-9.14≤R14≤-5.23,-13.14≤R16≤-8.25。
further, the mechanical structure of the lens comprises a main lens barrel, the main lens barrel is of a cylindrical structure with four-stage stepped holes inside, a first space ring is arranged between the negative meniscus lens A-2 and the biconvex lens A-3, a second space ring is arranged between the biconvex lens A-3 and the negative meniscus lens B-1, a third space ring is arranged between the biconvex lens B-2 and the biconvex lens B-3, an inner hole at the rear end of the main lens barrel is provided with an annular flange used for propping against the outer edge part of the rear end face of the biconvex lens B-5, and the front end of the main lens barrel is provided with a step used for dispensing and fixing the negative meniscus lens A-1.
The invention adopts another technical scheme that: the assembling method of the day and night dual-purpose big light-transmitting fixed focus lens with the black light level of 4mm comprises the steps of sequentially arranging a biconvex lens B-5, a biconcave lens B-4, a biconvex lens B-3, a third space ring, a biconvex lens B-2, a negative meniscus lens B-1, a second space ring, a biconvex lens A-3, a first space ring, a negative meniscus lens A-2 and a negative meniscus lens A-1 in a main lens barrel, enabling an annular flange at the rear end of the main lens barrel to prop against the outer edge part of the rear end face of the biconvex lens B-5, and fixing the negative meniscus lens A-1 at a step of the front end of the main lens barrel through dispensing.
Compared with the prior art, the invention has the following beneficial effects: the vertex angle lens has the advantages of simple structure, reasonable design, low manufacturing cost, short total length of the light path, small volume and good imaging quality; the F value is extremely small, the light quantity of the lens is improved, the whole picture can be brighter, the lens can better perform in a low-illumination environment, a clearer imaging effect is presented, and the day and night universal function is realized.
The present invention will be further described in detail below with reference to specific embodiments and associated drawings for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Drawings
FIG. 1 is a schematic diagram of a lens ray system according to an embodiment of the present invention;
Detailed Description
As shown in fig. 1, an optical system of the lens comprises a front lens group A with negative focal power and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path, wherein the front lens group A comprises a negative meniscus lens A-1, a negative meniscus lens A-2 and a biconvex lens A-3, which are sequentially arranged from front to back; the rear lens group B comprises a glued lens group, a biconvex lens B-3, a biconcave lens B-4 and a biconvex lens B-5 which are sequentially arranged from front to back and are closely connected with each other; a diaphragm C is arranged between the front lens group A and the rear lens group B.
In this embodiment, the negative meniscus lens A-1 is a glass spherical lens, the negative meniscus lens A-2 is a plastic aspherical lens, the biconvex lens A-3 is a glass spherical lens, the negative meniscus lens B-1 is a glass spherical lens, the biconvex lens B-2 is a glass spherical lens, the biconvex lens B-3 is a plastic aspherical lens, the biconcave lens B-4 is a plastic aspherical lens, and the biconvex lens B-5 is a plastic aspherical lens.
In this embodiment, an optical filter is disposed behind the rear lens group B, the air gap between the lenticular lens B-5 and the optical filter is 2.41mm, the air gap between the front lens group A and the rear lens group B is 1.3mm, the air gap between the lenticular lens A-3 and the diaphragm C is 0.4mm, the air gap between the negative meniscus lens A-1 and the negative meniscus lens A-2 is 3.1mm, the air gap between the negative meniscus lens A-2 and the lenticular lens A-3 is 0.05mm, the air gap between the lenticular lens B-2 and the lenticular lens B-3 is 0.07mm, the air gap between the lenticular lens B-3 and the biconcave lens B-4 is 0.51mm, and the air gap between the biconcave lens B-4 and the lenticular lens B-5 is 0.06mm.
In the present embodiment, the focal lengths f, refractive indexes n, and radii of curvature R of eight lenses of the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconvex lens B-3, the biconcave lens B-4, and the biconvex lens B-5 satisfy the following relational expressions:
-9.14≤f1≤-5.25，-13.5≤f2≤-8.5，f3=12.75，f4=-17.144，f5=7.61，8.1≤f6≤11.15，-8.1≤f7≤-4.15，5.1≤f8≤9.15；
1.45≤n1≤1.72，1.5≤n2≤1.75，1.8≤n3≤1.96，1.5≤n4≤1.75，1.4≤n5≤1.65，1.4≤n6≤1.65，1.6≤n7≤1.75，1.4≤n8≤1.65；
380≤R1≤480，-5≤R3≤-1.3，20.2≤R5≤28.25，23.14≤R7≤38.25，5.14≤R9≤9.2，5.14≤R11≤8.25，-2.14≤R13≤-5.25，4.14≤R15≤8.25，2.1≤R2≤5.25, -8.14≤R4≤-4.25, -28.51≤R6≤-20.2, 6.14≤R8≤9.25, -9.14≤R10≤-6.52,-18.14≤R12≤-9.31,-9.14≤R14≤-5.23,-13.14≤R16≤-8.25。
wherein f1 to f8 correspond to focal lengths of the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconvex lens B-3, the biconcave lens B-4, and the biconvex lens B-5, respectively; n1 to n8 correspond to refractive indices of the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconvex lens B-3, the biconcave lens B-4, and the biconvex lens B-5, respectively; r1, R3, R5, R7, R9, R11, R13 and R15 correspond to the radii of curvature of the front mirror surfaces of the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconvex lens B-3, the biconcave lens B-4 and the biconvex lens B-5, respectively, and R2, R4, R6, R8, R10, R12, R14 and R16 correspond to the radii of curvature of the rear mirror surfaces of the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconcave lens B-3, the biconcave lens B-4 and the biconcave lens B-5, respectively.
Specific parameter examples of each lens in the lens of the invention are shown in the following table:
wherein, the radius of curvature of the front mirror surface center of the negative meniscus lens A-2 is-2.9 mm, and the radius of curvature of the rear mirror surface center is-5.8 mm; the center curvature radius of the front mirror surface of the biconvex lens B-3 is 6.42mm, and the center curvature radius of the rear mirror surface is-16.93 mm; the center curvature radius of the front mirror surface of the biconcave lens B-4 is-2.66 mm, and the center curvature radius of the rear mirror surface is-7.14 mm; the center curvature radius of the front mirror surface of the biconcave lens B-5 is 6.25mm, the center curvature radius of the rear mirror surface is-10.7 mm, the front mirror surface is a mirror surface facing the object side, the rear mirror surface is a mirror surface facing the image side, and the thickness is the thickness of the lens axis line.
The aspheric surface equations on the four lenses of the negative meniscus lens A-2, the biconvex lens B-3, the biconcave lens B-4 and the biconcave lens B-5 are as follows:
wherein c is the basic curvature of the center of the surface, k represents a conical coefficient, r is the radial coordinate of a point on the surface, A0-A4 are high-order aspheric coefficients, and the values of the parameters are shown in the following table:
the invention is a fixed focus lens with a focal length of 4mm, by reasonably using the combination of a glass lens and a plastic lens and adopting an optical structure of 4G4P glass-plastic combination, the advantages of easy processing of the glass lens and lower cost of the plastic lens are fully exerted, meanwhile, the clear aperture is larger, the F value is 1.0, the angle of view is wide, the angle of view is 110 ℃, the total optical length of the lens is less than 22.5mm, the volume is small, and the lens can be matched with various interfaces; the imaging quality is good, clear and bright monitoring pictures can be realized even under low illumination at night, the day and night general function is realized, and meanwhile, the purpose of no coke running in an environment of minus 30 ℃ to plus 80 ℃ can be achieved.
In this embodiment, the mechanical structure of the lens includes a main lens barrel, the main lens barrel is a cylindrical structure having four-stage stepped holes therein, the diameter of an inner cavity of the main lens barrel is gradually reduced along the incident direction of light, a first spacer ring is disposed between the negative meniscus lens A-2 and the biconvex lens A-3, a second spacer ring is disposed between the biconvex lens A-3 and the negative meniscus lens B-1, a third spacer ring is disposed between the biconvex lens B-2 and the biconvex lens B-3, a first sharp angle shrinkage opening for blocking invalid light is disposed on the first spacer ring, a second sharp angle shrinkage opening for blocking invalid light is disposed on the second spacer ring, and a third sharp angle shrinkage opening for blocking invalid light is disposed on the third spacer ring.
The negative meniscus lens A-1 is tightly matched with the negative meniscus lens A-2 through a soma (light shielding sheet), the negative meniscus lens A-2 is tightly matched with the biconvex lens A-3 through a first spacing ring, the biconvex lens A-3 is tightly matched with the negative meniscus lens B-1 through a second spacing ring, the biconvex lens B-2 is tightly matched with the biconvex lens B-3 through a third spacing ring, the biconvex lens B-3 is tightly matched with the biconcave lens B-4 through a soma (light shielding sheet), and the biconcave lens B-4 is tightly matched with the biconvex lens B-5 through a soma (light shielding sheet).
The inner hole at the rear end of the main lens barrel is provided with an annular flange used for propping against the outer edge part of the rear end face of the biconvex lens B-5, the outer side of the rear end of the annular flange is provided with a dispensing groove used for mounting an optical filter, the rear end of the main lens barrel is provided with a threaded part matched with a camera base, and the front end of the main lens barrel is provided with a step used for dispensing and fixing the negative meniscus lens A-1.
The assembling method of the day and night dual-purpose large-light-transmission fixed focus lens with the black light level of 2.8mm comprises the steps of sequentially arranging a biconvex lens B-5, a biconcave lens B-4, a biconvex lens B-3, a third space ring, a biconvex lens B-2, a negative meniscus lens B-1, a second space ring, a biconvex lens A-3, a first space ring, a negative meniscus lens A-2 and a negative meniscus lens A-1 into a main lens barrel, tightly matching the negative meniscus lens A-1 and the negative meniscus lens A-2 through a light shielding sheet, tightly matching the biconcave lens B-3 and the biconcave lens B-4 through the light shielding sheet, tightly matching an annular flange at the rear end of the main lens barrel with the biconvex lens B-5 through the light shielding sheet, fixing the negative meniscus lens A-1 through spot gluing at a step at the front end of the main lens barrel, and installing a light filter at a spot gluing groove at the outer side of the rear end of the annular flange.
Any of the above-described embodiments of the present invention disclosed herein, unless otherwise stated, if they disclose a numerical range, then the disclosed numerical range is the preferred numerical range, as will be appreciated by those of skill in the art: the preferred numerical ranges are merely those of the many possible numerical values where technical effects are more pronounced or representative. Since the numerical values are more and cannot be exhausted, only a part of the numerical values are disclosed to illustrate the technical scheme of the invention, and the numerical values listed above should not limit the protection scope of the invention.
If the invention discloses or relates to components or structures fixedly connected with each other, then unless otherwise stated, the fixed connection is understood as: detachably fixed connection (e.g. using bolts or screws) can also be understood as: the non-detachable fixed connection (e.g. riveting, welding), of course, the mutual fixed connection may also be replaced by an integral structure (e.g. integrally formed using a casting process) (except for obviously being unable to use an integral forming process).
In addition, terms used in any of the above-described aspects of the present disclosure to express positional relationship or shape have meanings including a state or shape similar to, similar to or approaching thereto unless otherwise stated.
Any part provided by the invention can be assembled by a plurality of independent components, or can be manufactured by an integral forming process.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (2)
1. A4 mm black light level day and night dual-purpose big light-passing fixed focus lens is characterized in that: the optical system of the lens consists of a front lens group A with negative focal power and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path, wherein the front lens group A consists of a negative meniscus lens A-1, a negative meniscus lens A-2 and a biconvex lens A-3, which are sequentially arranged from front to back; the rear lens group B consists of a cemented lens group, a biconvex lens B-3, a biconcave lens B-4 and a biconvex lens B-5 which are sequentially arranged from front to back and are closely connected with each other; a diaphragm C is arranged between the front lens group A and the rear lens group B, the air interval between the front lens group A and the rear lens group B is 1.3mm, the air interval between the negative meniscus lens A-1 and the negative meniscus lens A-2 is 3.1mm, the air interval between the negative meniscus lens A-2 and the biconvex lens A-3 is 0.05mm, the air interval between the biconvex lens B-2 and the biconvex lens B-3 is 0.07mm, the air interval between the biconvex lens B-3 and the biconcave lens B-4 is 0.51mm, and the air interval between the biconcave lens B-4 and the biconvex lens B-5 is 0.06mm; the negative meniscus lens A-1 is a glass spherical lens, the negative meniscus lens A-2 is a plastic aspherical lens, the biconvex lens A-3 is a glass spherical lens, the negative meniscus lens B-1 is a glass spherical lens, the biconvex lens B-2 is a glass spherical lens, the biconvex lens B-3 is a plastic aspherical lens, the biconcave lens B-4 is a plastic aspherical lens, and the biconvex lens B-5 is a plastic aspherical lens; the focal length f, refractive index n and radius of curvature R of eight lenses, namely, the negative meniscus lens A-1, the negative meniscus lens A-2, the biconvex lens A-3, the negative meniscus lens B-1, the biconvex lens B-2, the biconvex lens B-3, the biconcave lens B-4 and the biconvex lens B-5, satisfy the following relational expression:
-9.14≤f1≤-5.25，-13.5≤f2≤-8.5，f3=12.75，f4=-17.144，f5=7.61，8.1≤f6≤11.15，-8.1≤f7≤-4.15，5.1≤f8≤9.15；1.45≤n1≤1.72，1.5≤n2≤1.75，1.8≤n3≤1.96，1.5≤n4≤1.75，1.4≤n5≤1.65，1.4≤n6≤1.65，1.6≤n7≤1.75，1.4≤n8≤1.65；380≤R1≤480，-5≤R3≤-1.3，20.2≤R5≤28.25，23.14≤R7≤38.25，5.14≤R9≤9.2，5.14≤R11≤8.25，-2.14≤R13≤-5.25，4.14≤R15≤8.25，2.1≤R2≤5.25, -8.14≤R4≤-4.25, -28.51≤R6≤-20.2, 6.14≤R8≤9.25, -9.14≤R10≤-6.52,-18.14≤R12≤-9.31,-9.14≤R14≤-5.23,-13.14≤R16≤-8.25；
the mechanical structure of the lens comprises a main lens barrel, the main lens barrel is of a cylindrical structure with four-stage stepped holes inside, a first space ring is arranged between a negative meniscus lens A-2 and a double convex lens A-3, a second space ring is arranged between the double convex lens A-3 and a negative meniscus lens B-1, a third space ring is arranged between the double convex lens B-2 and the double convex lens B-3, an annular flange used for propping against the outer edge of the rear end face of the double convex lens B-5 is arranged in an inner hole at the rear end of the main lens barrel, and a step used for dispensing and fixing the negative meniscus lens A-1 is arranged at the front end of the main lens barrel.
2. The method for assembling the 4mm black light level day and night large-light-transmission fixed focus lens as claimed in claim 1, which is characterized in that: the main lens barrel is sequentially provided with a biconvex lens B-5, a biconcave lens B-4, a biconvex lens B-3, a third space ring, a biconvex lens B-2, a negative meniscus lens B-1, a second space ring, a biconvex lens A-3, a first space ring, a negative meniscus lens A-2 and a negative meniscus lens A-1, an annular flange at the rear end of the main lens barrel is propped against the outer edge part of the rear end face of the biconvex lens B-5, and the negative meniscus lens A-1 is fixed at the step of the front end of the main lens barrel through dispensing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015218.XA CN110927937B (en) | 2020-01-07 | 2020-01-07 | Day and night dual-purpose large-light-transmission fixed focus lens with black light level of 4mm and assembly method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010015218.XA CN110927937B (en) | 2020-01-07 | 2020-01-07 | Day and night dual-purpose large-light-transmission fixed focus lens with black light level of 4mm and assembly method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110927937A CN110927937A (en) | 2020-03-27 |
| CN110927937B true CN110927937B (en) | 2023-11-28 |
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| JP2003307677A (en) * | 2002-04-15 | 2003-10-31 | Matsushita Electric Ind Co Ltd | Zoom lens and electronic still camera |
| CN104360466A (en) * | 2014-11-18 | 2015-02-18 | 中山联合光电科技有限公司 | Small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system |
| CN110221401A (en) * | 2019-05-08 | 2019-09-10 | 中山联合光电科技股份有限公司 | A kind of infrared confocal wide-angle lens |
| CN211478740U (en) * | 2020-01-07 | 2020-09-11 | 深圳融合光学科技有限公司 | 4mm black light level day and night dual-purpose large-light-transmission focusing lens |
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| US20160334609A1 (en) * | 2015-05-15 | 2016-11-17 | Calin Technology Co., Ltd. | Zoom lens |
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| JP2003307677A (en) * | 2002-04-15 | 2003-10-31 | Matsushita Electric Ind Co Ltd | Zoom lens and electronic still camera |
| CN104360466A (en) * | 2014-11-18 | 2015-02-18 | 中山联合光电科技有限公司 | Small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system |
| CN110221401A (en) * | 2019-05-08 | 2019-09-10 | 中山联合光电科技股份有限公司 | A kind of infrared confocal wide-angle lens |
| CN211478740U (en) * | 2020-01-07 | 2020-09-11 | 深圳融合光学科技有限公司 | 4mm black light level day and night dual-purpose large-light-transmission focusing lens |
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