CN211478739U - Small-sized day and night dual-purpose glass-plastic mixed athermalized fixed-focus lens - Google Patents
Small-sized day and night dual-purpose glass-plastic mixed athermalized fixed-focus lens Download PDFInfo
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- CN211478739U CN211478739U CN202020026962.5U CN202020026962U CN211478739U CN 211478739 U CN211478739 U CN 211478739U CN 202020026962 U CN202020026962 U CN 202020026962U CN 211478739 U CN211478739 U CN 211478739U
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- 230000005499 meniscus Effects 0.000 claims abstract description 39
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 238000003384 imaging method Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 210000005056 cell body Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
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Abstract
The utility model relates to a small-sized day and night dual-purpose glass-plastic mixed athermalized fixed focus lens, wherein an optical system of the lens comprises a front lens group A with negative focal power, a diaphragm C and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path; the front lens group A comprises a negative meniscus lens A-1 and a positive meniscus lens A-2 which are sequentially arranged from front to back, and the rear lens group B comprises a biconvex lens B-1, a biconcave lens B-2 and a biconvex lens B-3 which are sequentially arranged from front to back. The small-sized day and night glass-plastic mixed athermalized focusing lens has the advantages of simple structure, reasonable design, low manufacturing cost, short total length of the light path and small volume; the F value is small, the clear aperture is large, the field angle is wide, the light transmission quantity of the lens is improved, the whole picture can be brighter, the performance of the lens in a low-illumination environment is better, a clearer imaging effect is achieved, and a day and night confocal function is achieved.
Description
Technical Field
The utility model relates to a small-size dual-purpose glass of day night is moulded and is mixed no thermalization prime lens belongs to optical device technical field.
Background
With the rapid development of the market of camera lenses, in recent years, a miniature camera lens which is more standardized and stable and can be used with a camera has been formed, under the stable lens imaging condition, the requirements of customers on the performance of the lens are continuously increased, the current market is lack of large light transmission amount, the imaging is clear, a heatless and day and night confocal security lens is ensured, more lenses can be adopted or the light transmission aperture can be reduced for improving the performance of the lens, but the cost is increased or the light transmission amount is insufficient, and the cost and the performance are difficult to balance.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a small-size day and night dual-purpose glass-plastic mixed athermalization fixed focus lens that is small, and the light transmission is big, and the formation of image is clear.
The utility model discloses a following scheme realizes: a small-sized day and night glass-plastic mixed athermalized prime lens, the optical system of the lens comprises a front lens group A with negative focal power, a diaphragm C and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path; the front lens group A comprises a negative meniscus lens A-1 and a positive meniscus lens A-2 which are sequentially arranged from front to back, and the rear lens group B comprises a biconvex lens B-1, a biconcave lens B-2 and a biconvex lens B-3 which are sequentially arranged from front to back.
Further, the air space between the front lens group a and the rear lens group B is 1.4mm, the air space between the negative meniscus lens a-1 and the positive meniscus lens a-2 is 2.6mm, the air space between the double convex lens B-1 and the double concave lens B-2 is 0.4mm, and the air space between the double concave lens B-2 and the double convex lens B-3 is 0.3 mm.
Further, the negative meniscus lens A-1 is a glass spherical lens, the positive meniscus lens A-2 is a plastic aspheric lens, the biconvex lens B-1 is a glass spherical lens, the biconcave lens B-2 is a plastic aspheric lens, and the biconvex lens B-3 is a plastic aspheric lens.
Furthermore, the mechanical structure of the lens comprises a main lens cone, the main lens cone is of a cylindrical structure with four stages of stepped holes inside, a first space ring is arranged between the positive meniscus lens A-2 and the double convex lens B-1, a second space ring is arranged between the double convex lens B-1 and the double concave lens B-2, an annular flange used for propping against the outer edge part of the rear end face of the double convex lens B-3 is arranged in an inner hole at the rear end of the main lens cone, and a step used for fixing the negative meniscus lens A-1 in a melting mode is arranged at the front end of the main lens cone.
Compared with the prior art, the utility model discloses following beneficial effect has: the small-sized day and night glass-plastic mixed athermalized focusing lens has the advantages of simple structure, reasonable design, low manufacturing cost, short total length of the light path and small volume; f numerical value is little, and the clear aperture is great, and the field angle is wide, improves the camera lens light transmission amount, not only can make whole picture brighter to make the camera lens show better under the low-light environment, present more clear imaging, even also can realize clear bright control picture under the low illumination at night, realize the confocal function of day night.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and related drawings.
Drawings
Fig. 1 is a light path diagram of a lens light system according to an embodiment of the present invention;
Detailed Description
As shown in fig. 1, an optical system of a small day and night dual-purpose glass-plastic hybrid athermalized fixed focus lens includes a front lens group a with negative focal power, a diaphragm C and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path; the front lens group A comprises a negative meniscus lens A-1 and a positive meniscus lens A-2 which are sequentially arranged from front to back, and the rear lens group B comprises a biconvex lens B-1, a biconcave lens B-2 and a biconvex lens B-3 which are sequentially arranged from front to back.
In this embodiment, the air space between the front lens group a and the rear lens group B is 1.4mm, the air space between the positive meniscus lens a-2 and the diaphragm C is 0.02mm, the optical filter is disposed behind the rear lens group B, and the air space between the double convex lens B-3 and the optical filter is 5 mm; the air space between the negative meniscus lens a-1 and the positive meniscus lens a-2 was 2.6mm, the air space between the biconvex lens B-1 and the biconcave lens B-2 was 0.4mm, and the air space between the biconcave lens B-2 and the biconvex lens B-3 was 0.3 mm.
In this embodiment, the negative meniscus lens a-1 is a glass spherical lens, the positive meniscus lens a-2 is a plastic aspherical lens, the biconvex lens B-1 is a glass spherical lens, the biconcave lens B-2 is a plastic aspherical lens, and the biconvex lens B-3 is a plastic aspherical lens.
The negative meniscus lens A-1, the positive meniscus lens A-2, the biconvex lens B-1, the biconcave lens B-2 and the biconvex lens B-3, and the focal length f, the refractive index n and the curvature radius R of the eight lenses satisfy the following relational expression:
-9.14≤f1≤-2.25，10.5≤f2≤-22.5，2.14≤f3≤9.25，-8.1≤f4≤-2.15，3.14≤f5≤14.5，
1.65≤n1≤1.92， 1.4≤n2≤1.65， 1.5≤n3≤1.65， 1.5≤n4≤1.75，1.4≤n5≤1.65，
18.1≤R1≤22.2， -8.2≤R3≤-4.3， 8.14≤R5≤14.25，-12.14≤R7≤-8.25，2.14≤R9≤7.25，1.1≤R2≤4.25，-6.14≤R4≤-2.25，-6.14≤R6≤-2.25，4.14≤R8≤8.25，-8.14≤R10≤-4.25。
wherein f1 to f5 correspond to focal lengths of the negative meniscus lens A-1, the positive meniscus lens A-2, the double convex lens B-1, the double concave lens B-2 and the double convex lens B-3, respectively; n1 to n5 correspond to the refractive indices of the negative meniscus lens A-1, the positive meniscus lens A-2, the biconvex lens B-1, the biconcave lens B-2 and the biconvex lens B-3, respectively; r1, R3, R5, R7 and R9 respectively correspond to the curvature radiuses of front mirror surfaces of a negative meniscus lens A-1, a positive meniscus lens A-2, a double convex lens B-1, a double concave lens B-2 and a double convex lens B-3, and R2, R4, R6, R8 and R10 respectively correspond to the curvature radiuses of rear mirror surfaces of the negative meniscus lens A-1, the positive meniscus lens A-2, the double convex lens B-1, the double concave lens B-2 and the double convex lens B-3.
Specific parameter embodiments of each lens in the lens of the invention are shown in the following table:
wherein, the central curvature radius of the front mirror surface of the positive meniscus lens A-2 is minus 6.57mm, and the central curvature radius of the rear mirror surface is minus 4.8 mm; the center curvature radius of the front mirror surface of the biconcave lens B-2 is-10.47 mm, and the center curvature radius of the rear mirror surface is 6.36 mm; the central curvature radius of the front mirror surface of the biconvex lens B-3 is 5.47mm, and the central curvature radius of the rear mirror surface is-6.24 mm; the front mirror surface is a mirror surface facing an object space, the rear mirror surface is a mirror surface facing an image space, and the thickness is the thickness of the lens at the axis line.
The aspheric surface type equations of the positive meniscus lens A-2, the biconcave lens B-2 and the biconvex lens B-3 are as follows:
wherein c is the basic curvature of the center of the surface type, k represents a conical coefficient, r is the radial coordinate of a point on the surface, A0-A4 is a high-order aspheric coefficient, and the parameter values are shown in the following table:
the utility model discloses a fixed focus camera lens of 3mm focus, through the combination of rational use glass lens and plastic lens, full play glass lens easily processes and the lower advantage of plastic lens cost, adopt the optical structure that 3G2P glass moulded the combination, the imaging quality is good, and make and need not the focusing under the clear condition of visible light formation of image and can also clearly form images to the infrared light, and make infrared imaging also can reach 5 million pixels, even also can realize clear bright control picture under the low light level night, realize the confocal function of day night, can reach simultaneously and use not run burnt under-30- +80 ℃ of environment.
In this embodiment, the mechanical structure of the lens includes a main lens barrel, the main lens barrel is a cylindrical structure having four stages of stepped holes therein, the diameter of an inner cavity of the main lens barrel decreases step by step along a light incident direction, a first space ring is disposed between the positive meniscus lens a-2 and the double convex lens B-1, a second space ring is disposed between the double convex lens B-1 and the double concave lens B-2, a first sharp corner notch for blocking the ineffective light is disposed on the first space ring, and a second sharp corner notch for blocking the ineffective light is disposed on the second space ring. An inner hole at the rear end of the main lens cone is provided with an annular flange used for propping against the outer edge part of the rear end surface of the biconvex lens B-3, the outer side of the rear end of the annular flange is provided with a glue dispensing groove used for installing an optical filter, the main lens cone is provided with a threaded part used for being matched with a camera base, and the front end of the main lens cone is provided with a step used for fusing and fixing the negative meniscus lens A-1.
The first lens A-1 and the second lens A-2 are tightly matched through a soma (shading sheet), the second lens A-2 and the third lens B-1 are tightly matched through a space ring, the third lens B-1 and the fourth lens B-2 are tightly matched through a space ring, and the 4 th lens B-2 and the 5 th lens B-3 are tightly matched through a soma (shading sheet).
The small-sized day and night glass-plastic mixed athermalized focusing lens has the advantages of simple structure, reasonable design, shorter total optical path length, smaller total optical length than 20.5mm, small volume, larger rear intercept and capability of being adapted to various interfaces; the numerical value of F is small, the numerical value of F is 2.0, the clear aperture is large, the field angle is wide and is 140 degrees, the light transmission quantity of the lens is improved, the whole picture can be brighter, the performance of the lens in a low-light environment is better, and a clearer imaging effect is presented.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (4)
1. The utility model provides a small-size dual-purpose glass-plastic of day night mixes no thermalization tight shot which characterized in that: the optical system of the lens comprises a front lens group A with negative focal power, a diaphragm C and a rear lens group B with positive focal power, which are sequentially arranged from front to back along an incident light path; the front lens group A comprises a negative meniscus lens A-1 and a positive meniscus lens A-2 which are sequentially arranged from front to back, and the rear lens group B comprises a biconvex lens B-1, a biconcave lens B-2 and a biconvex lens B-3 which are sequentially arranged from front to back.
2. The small day and night glass-plastic hybrid athermalized prime lens according to claim 1, wherein: the air space between the front lens group A and the rear lens group B is 1.4mm, the air space between the negative meniscus lens A-1 and the positive meniscus lens A-2 is 2.6mm, the air space between the double convex lens B-1 and the double concave lens B-2 is 0.4mm, and the air space between the double concave lens B-2 and the double convex lens B-3 is 0.3 mm.
3. The small day and night glass-plastic hybrid athermalized prime lens according to claim 1 or 2, wherein: the negative meniscus lens A-1 is a glass spherical lens, the positive meniscus lens A-2 is a plastic aspheric lens, the biconvex lens B-1 is a glass spherical lens, the biconcave lens B-2 is a plastic aspheric lens, and the biconvex lens B-3 is a plastic aspheric lens.
4. The small day and night glass-plastic hybrid athermalized prime lens according to claim 1, wherein: the mechanical structure of the lens comprises a main lens barrel, the main lens barrel is of a cylindrical structure with four stages of stepped holes inside, a first space ring is arranged between the positive meniscus lens A-2 and the double convex lens B-1, a second space ring is arranged between the double convex lens B-1 and the double concave lens B-2, 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 double convex lens B-3, and the front end of the main lens barrel is provided with a step used for fixing the negative meniscus lens A-1 in a melting mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020026962.5U CN211478739U (en) | 2020-01-07 | 2020-01-07 | Small-sized day and night dual-purpose glass-plastic mixed athermalized fixed-focus lens |
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| CN202020026962.5U CN211478739U (en) | 2020-01-07 | 2020-01-07 | Small-sized day and night dual-purpose glass-plastic mixed athermalized fixed-focus lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236776A (en) * | 2022-01-26 | 2022-03-25 | 深圳融合光学科技有限公司 | Wave-plastic mixed star light level 8mm day and night monitoring lens and imaging method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114236776A (en) * | 2022-01-26 | 2022-03-25 | 深圳融合光学科技有限公司 | Wave-plastic mixed star light level 8mm day and night monitoring lens and imaging method thereof |
| CN114236776B (en) * | 2022-01-26 | 2023-11-28 | 福建福光天瞳光学有限公司 | Glass-plastic mixed starlight level 8mm day and night monitoring lens and imaging method thereof |
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Effective date of registration: 20231026 Address after: 350301 Optoelectronic Technology Park, Rongqiao Economic and Technological Development Zone, Fuqing City, Fuzhou City, Fujian Province Patentee after: FUJIAN FUGUANG TIANTONG OPTICS Co.,Ltd. Address before: 6 / F, Juyou Business Center (Phoenix building), No.15, Keji North 1st Road, songpingshan community, Xili street, Nanshan District, Shenzhen, Guangdong 518000 Patentee before: Shenzhen fusion Optical Technology Co.,Ltd. |
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