CN112649948B - Long-focus athermalized day-and-night low-sensitivity lens and working method thereof - Google Patents
Long-focus athermalized day-and-night low-sensitivity lens and working method thereof Download PDFInfo
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- CN112649948B CN112649948B CN202110141464.4A CN202110141464A CN112649948B CN 112649948 B CN112649948 B CN 112649948B CN 202110141464 A CN202110141464 A CN 202110141464A CN 112649948 B CN112649948 B CN 112649948B
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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
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, 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
Abstract
The invention relates to a long-focus athermalized day and night low-sensitivity lens and a working method thereof, wherein the long-focus athermalized day and night low-sensitivity lens comprises a front group A, a diaphragm C, a rear group B, a parallel flat plate and an IMA image surface which are sequentially arranged along the incident direction of light rays from left to right, the front group A comprises a first positive meniscus lens, a second negative meniscus lens, a third positive meniscus lens, a fourth double convex positive lens, a fifth double concave negative lens and a sixth negative meniscus lens which are sequentially arranged, the rear group B comprises a first double concave negative lens, a second double convex positive lens and a third double convex positive lens which are sequentially arranged, and the second negative meniscus lens, the third positive meniscus lens and the fifth double concave negative lens of the front group A, the sixth negative meniscus lens and the first double concave negative lens and the second double convex positive lens of the rear group B are double cemented lenses; the invention also relates to a working method of the long-focus athermalized day and night low-sensitivity lens. The invention has simple and reasonable structure, large aperture, low sensitivity, no thermalization, dual purposes of day and night and high resolution.
Description
Technical Field
The invention relates to a long-focus athermalized day and night low-sensitivity lens and a working method thereof.
Background
In recent years, with the development of smart city intelligent traffic, the requirements for the pixels of the telephoto lens and the day and night dual-purpose lens are higher and higher, but the existing lens generally has the defects: 1. the dual-purpose effect of pixel and day and night is not good, and the dual-purpose effect of no thermalization and day and night can be achieved only by installing one or more lenses; 2. the aperture is small, and the requirement of the minimum imaging illumination of the CCD chip can not be met under low illumination, so that clear imaging can not be realized.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the present invention is to provide a long-focus athermal low-sensitivity lens for both day and night use and a working method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a dual-purpose low sensitivity camera lens of long burnt athermalization day night, includes along the preceding group A, diaphragm C, back group B, parallel flat board, IMA image plane that light from left right incident direction set gradually, preceding group A is including the first positive lens of meniscus, second meniscus negative lens, third meniscus positive lens, fourth biconvex positive lens, fifth biconcave negative lens, the sixth meniscus negative lens that set gradually, and back group B is including the first biconcave negative lens, second biconvex positive lens, the third biconvex positive lens that set gradually, preceding group A second meniscus negative lens, third meniscus positive lens and fifth biconcave negative lens, sixth meniscus negative lens and the first biconcave negative lens of back group B, second biconvex positive lens all are the biconcave lens.
Further, the diaphragm is located between the front group a and the rear group B.
Further, the air space between the first positive meniscus lens of the front group a and the second negative meniscus lens of the front group a is 3mm to 4.5 mm, the air space between the third positive meniscus lens of the front group a and the fourth double convex positive meniscus lens of the front group a is 0.05mm to 0.2mm, the air space between the fifth double concave negative meniscus lens of the front group a and the sixth negative meniscus lens of the front group a is 0.1mm to 0.3mm, the air space between the sixth negative meniscus lens of the front group a and the first double concave negative lens of the rear group B is 9.0mm to 12mm, and the air space between the second double convex positive meniscus lens of the rear group B and the third double convex positive lens of the rear group B is 0.5mm to 1.2 mm.
Further, the total focal length of the optical system is set to f, the focal lengths of the front group a first positive meniscus lens, the front group a second negative meniscus lens, the front group a third positive meniscus lens, the front group a fourth double convex positive lens, the front group a fifth double concave negative lens, the front group a sixth negative meniscus lens, the rear group B first negative double concave lens, the rear group B second double convex positive lens and the rear group B third double convex positive lens are sequentially set to f1, f2, f3, f4, f5, f6, f7, f8 and f9 along the incident direction of the light, and the focal lengths of the lenses are as follows: 1< f1/f <1.5, -1< f2/f < -0.5, -0.5 < f3/f <1, -0.5 < f4/f <1, -1.0< f5/f < -0.5, -1.0< f6/f < -0.5, -1.0< f7/f < -0.1, 0.1< f8/f <1, 0.1< f9/f < 1.0.
The invention provides another technical scheme, which is a working method of a long-focus athermalized day and night low-sensitivity lens, when light enters, a light path sequentially enters a front group A, a diaphragm C, a rear group B and a parallel flat plate, and finally imaging is carried out on an IMA image surface; the second negative meniscus lens is glued with the third positive meniscus lens, and the fourth double-convex positive lens is glued with the fifth double-concave negative lens, so that the secondary spectrum and the spherical aberration are well corrected, and the chromatic aberration is well corrected through reasonable matching of materials of the lens system.
Compared with the prior art, the invention has the following beneficial effects: the lens has simple structure, low sensitivity, large aperture, no thermalization, dual purposes of day and night and high resolution.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic diagram of an optical system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the Saddy coefficient according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a defocused MTF value of visible light according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an infrared defocus MTF value according to an embodiment of the present invention;
in the figure: 100-front group A; 110-a first positive meniscus lens; 120-a second negative meniscus lens; 130-a third positive meniscus lens; 140-a fourth biconvex positive lens; 150-a fifth biconcave negative lens; 160-sixth negative meniscus lens; 200-rear group B; 210-a first biconcave negative lens; 220-a second biconvex positive lens; 230-a third biconvex positive lens; 300-diaphragm; 400-parallel plates; 500-IMA image plane.
Detailed Description
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, a long-focus athermalized day and night low-sensitivity lens includes a front group a100, a diaphragm C300, a rear group B200, a parallel plate 400, and an IMA image plane 500 sequentially arranged along a left-to-right incident direction of light, where the front group a100 includes a first positive meniscus lens 110, a second negative meniscus lens 120, and a third positive meniscus lens 130 sequentially arranged; a fourth biconvex positive lens 140; a fifth biconcave negative lens 150; the sixth negative meniscus lens 160 and the rear group B200 include a first double concave negative lens 210, a second double convex positive lens 220, and a third double convex positive lens 230, which are sequentially disposed.
Further, diaphragm 300 is located between front group 100 and rear group 200.
Further, the air space between the first positive meniscus lens 110 of the front group a and the second negative meniscus lens 120 of the front group a is 3mm to 4.5 mm, the air space between the third positive meniscus lens 130 of the front group a and the fourth double convex positive meniscus lens 140 of the front group a is 0.05mm to 0.2mm, the air space between the fifth negative meniscus lens 150 of the front group a and the sixth negative meniscus lens 160 of the front group a is 0.1mm to 0.3mm, the air space between the sixth negative meniscus lens 160 of the front group a and the first double concave negative lens 210 of the rear group B is 9.0mm to 12mm, and the air space between the second double convex positive meniscus lens 220 of the rear group B and the third double convex positive lens 230 of the rear group B is 0.5mm to 1.2 mm.
Further, the total focal length of the optical system is set to f, the front group a first positive meniscus lens 110, the front group a second negative meniscus lens 120, the front group a third positive meniscus lens 130, the front group a fourth double convex positive lens 140, the front group a fifth double concave negative lens 150, the front group a sixth negative meniscus lens 160, the rear group B first double concave negative lens 210, the rear group B second double convex positive lens 220, and the rear group B third double convex positive lens 230 are sequentially set to f1, f2, f3, f4, f5, f6, f7, f8, f9 along the incident direction of the light, and the focal lengths of the lenses are as follows: 1< f1/f <1.5, -1< f2/f < -0.5, 0.5< f3/f <1, 0.5< f4/f <1, -1.0< f5/f < -0.5, -1.0< f6/f < -0.5, -1.0< f7/f < -0.1, 0.1< f8/f <1, 0.1< f9/f < 1.0.
TABLE 1 specific lens parameters are as follows
| Surface number | R value | Thickness of | |
| 1 | 5.2690033367335800E+01 | 4.71934364970400E+00 | E-FDS3 |
| 2 | 1.1291239149756400E+02 | 3.85548904022100E+00 | |
| 3 | 8.0130852679507900E+01 | 2.31989702669300E+00 | FD60 |
| 4 | 2.7500238940833800E+01 | 7.22249573094300E+00 | H-ZPK5 |
| 5 | 2.6359742321304000E+02 | 1.00303593886400E-01 | |
| 6 | 3.0930475048935800E+01 | 6.49483263082600E+00 | H-ZPK5 |
| 7 | -3.7180983676259900E+02 | 6.88907358060400E+00 | H-ZF13 |
| 8 | 4.3956774082524800E+01 | 2.00314486686600E-01 | |
| 9 | 3.9651694144702300E+01 | 8.10661180721600E+00 | FDS20- |
| 10 | 1.7182997671628900E+01 | 1.09043697241400E+01 | |
| 11 | infinity | 1.61598691730900E+00 | |
| 12 | -2.3162779633859000E+01 | 1.49759475740800E+00 | H-TF5 |
| 13 | 4.0482419935409000E+01 | 7.51016492111200E+00 | H-ZLAF68C |
| 14 | -3.2961494336620800E+01 | 8.84656651328100E-01 | |
| 15 | 6.7779690659385700E+01 | 4.48554923835500E+00 | H-ZLAF56B |
| 16 | -1.6598117312391900E+02 | 2.34462533223500E+01 | |
| 17 | 1.80000000000000E+00 | H-K9L | |
| 18 | 0 |
In this embodiment, the technical indexes of the optical system are as follows: (1) focal length: EFFL =70 mm; (2) f number = 1.8; (3) relative illuminance: RI is more than or equal to 50 percent (4), and the diameter of the imaging circle is more than phi 9 mm; (5) working spectral range: 430 nm-850 nm; (6) the total optical length TTL is less than or equal to 100mm, the optical rear intercept is more than or equal to 20 mm (7), and the F-Theta distortion is less than or equal to 1 percent; (8) the lens is suitable for 800 ten thousand pixel high-resolution CCD or CMOS cameras.
A working method of a long-focus athermalization day and night low-sensitivity lens comprises the steps that when light enters, a light path sequentially enters a front group A100, a diaphragm C300, a rear group B200 and a parallel flat plate 400, imaging is finally carried out on an IMA image surface 500, when the light passes through the front group A100, a first lens 110 of the front group A100 can converge the incident angle of the light, and when the light passes through the other lenses, aberration balance can be carried out; the 2 nd negative lens 120 is glued with the 3 rd positive lens 130, and the 4 th positive lens 140 is glued with the 5 th negative lens 150, so that the secondary spectrum and spherical aberration are well corrected, and the chromatic aberration is well corrected through reasonable matching of materials of the lens system.
The above-mentioned operation flow and software and hardware configuration are only used as the preferred embodiment of the present invention, and not to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or directly or indirectly applied to the related art, are included in the scope of the present invention.
Claims (5)
1. A long-focus athermalized day and night low-sensitivity lens is characterized in that: the lens comprises a front group (A), a diaphragm C, a rear group (B), a parallel flat plate and an IMA image surface which are sequentially arranged along the incident direction of light rays from left to right, wherein the front group (A) consists of a first positive meniscus lens, a second negative meniscus lens, a third positive meniscus lens, a fourth double convex positive lens, a fifth double concave negative lens and a sixth negative meniscus lens which are sequentially arranged;
technical indexes realized by the optical system are as follows: (1) focal length: EFFL =70 mm; (2) f number = 1.8.
2. The long-focus athermalized day-and-night low-sensitivity lens according to claim 1, wherein: the air space between the first positive meniscus lens of the front group (A) and the second negative meniscus lens of the front group (A) is 3mm-4.5 mm, the air space between the third positive meniscus lens of the front group (A) and the fourth double convex positive meniscus lens of the front group (A) is 0.05mm-0.2mm, the air space between the fifth double concave negative lens of the front group (A) and the sixth negative meniscus lens of the front group (A) is 0.1mm-0.3mm, the air space between the sixth negative meniscus lens of the front group (A) and the first double concave negative lens of the rear group (B) is 9.0mm-12mm, and the air space between the second double convex positive lens of the rear group (B) and the third double convex positive meniscus lens of the rear group (B) is 0.5mm-1.2 mm.
3. The afocal athermal day-night low-sensitivity lens according to claim 2, further comprising: setting the total focal length of the optical system as f, sequentially setting the focal lengths of a front group (A) first positive meniscus lens, a front group (A) second negative meniscus lens, a front group (A) third positive meniscus lens, a front group (A) fourth double convex positive lens, a front group (A) fifth double concave negative lens, a front group (A) sixth negative meniscus lens, a rear group (B) first double concave negative lens, a rear group (B) second double convex positive lens and a rear group (B) third double convex positive lens as f1, f2, f3, f4, f5, f6, f7, f8 and f9 along the incident direction of light rays, wherein the focal lengths of the lenses are as follows: 1< f1/f <1.5, -1< f2/f < -0.5, -0.5 < f3/f <1, -0.5 < f4/f <1, -1.0< f5/f < -0.5, -1.0< f6/f < -0.5, -1.0< f7/f < -0.1, 0.1< f8/f <1, 0.1< f9/f < 1.0.
4. The long-focus athermalized day-and-night low-sensitivity lens according to claim 1, 2 or 3, wherein: specific lens parameters are as follows:
the technical indexes of the optical system are as follows: (3) the relative illumination RI is more than or equal to 50 percent (4), and the diameter of the imaging circle is more than phi 9 mm; (5) working spectral range: 430 nm-850 nm; (6) the total optical length TTL is less than or equal to 100mm, the optical rear intercept is more than or equal to 20 mm, and (7) the F-Theta distortion is less than or equal to 1 percent; (8) the lens is suitable for 800 ten thousand pixel high-resolution CCD or CMOS cameras.
5. A method of operating the telephoto, athermalized day and night low sensitivity lens set according to claim 1, 2, 3, or 4, wherein when light enters, the light path sequentially enters the front group (a), the stop C, the rear group (B), the parallel plates, and finally is imaged on the IMA image plane, when the light passes through the front group (a), the first lens of the front group (a) converges the incident angle of the light, and when the light passes through the remaining lenses, the aberration balance is performed; the second negative meniscus lens is glued with the third positive meniscus lens, and the fourth double-convex positive lens is glued with the fifth double-concave negative lens, so that the secondary spectrum and the spherical aberration are well corrected, and the chromatic aberration is well corrected through reasonable matching of materials of the lens system.
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| CN114063257B (en) * | 2021-11-25 | 2023-05-09 | 福建师范大学 | Wide-angle large-aperture athermal Jiao An anti-lens |
| CN114942512B (en) * | 2022-05-06 | 2023-05-05 | 福建福光股份有限公司 | Large aperture long focus lens |
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| JP3045634B2 (en) * | 1994-03-29 | 2000-05-29 | 富士写真光機株式会社 | Photographic lens |
| JP5564959B2 (en) * | 2010-01-22 | 2014-08-06 | 株式会社ニコン | Wide angle lens, imaging device, and manufacturing method of wide angle lens |
| JP2013083783A (en) * | 2011-10-07 | 2013-05-09 | Tamron Co Ltd | Inner focus type lens |
| CN103487920B (en) * | 2013-09-30 | 2016-06-08 | 中国科学院西安光学精密机械研究所 | Wide field image space telecentric optical system of three-line-array three-dimensional aerial survey camera |
| CN109425956A (en) * | 2017-08-24 | 2019-03-05 | 福州开发区鸿发光电子技术有限公司 | A kind of starlight grade rifle takes aim at object lens |
| CN109001889B (en) * | 2018-09-05 | 2023-12-22 | 南阳利达光电有限公司 | Athermalization day and night high-definition vehicle-mounted lens |
| CN110361834B (en) * | 2019-06-28 | 2021-08-10 | 福建福光股份有限公司 | Wide-angle lens with low distortion and high relative illumination and working method thereof |
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