CN110109232B - Zoom lens and imaging method thereof - Google Patents
Zoom lens and imaging method thereof Download PDFInfo
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- CN110109232B CN110109232B CN201910396924.0A CN201910396924A CN110109232B CN 110109232 B CN110109232 B CN 110109232B CN 201910396924 A CN201910396924 A CN 201910396924A CN 110109232 B CN110109232 B CN 110109232B
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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
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Abstract
The invention relates to a zoom lens, which is characterized in that: the optical system of the lens is sequentially provided with a front group A, a diaphragm C and a rear group B along the incident direction of light rays from left to right, wherein the front group A is composed of a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and the rear group B is composed of a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3, a biconvex lens B-4, a close connection glue group, a negative crescent lens B-5 and a biconvex lens B-6. The optical lens adopts a spherical surface design and an aspheric surface design, so that the clear aperture spherical aberration of the lens is increased, and the imaging quality of the edge of the lens is greatly improved. The product is suitable for various security monitoring fields.
Description
Technical Field
The invention relates to a zoom lens and an imaging method thereof.
Background
With the rapid development of economy and science and technology, the national security problem becomes the focus of attention of the whole society at present no matter developed countries or developing countries, and cameras are located everywhere in the daily living environment of ordinary people, such as supermarkets, office buildings, garages, streets, hotels, squares and even residential districts, so that the cameras are everywhere, the traditional lens has serious purple edges, and the scheme is generated in order to improve the imaging quality of the lens.
Disclosure of Invention
The invention aims to overcome the defects and provides a zoom lens with a simple structure and an imaging method thereof.
The technical scheme is that a front group A, a diaphragm C and a rear group B are sequentially arranged in an optical system of the lens along the incident direction of light rays from left to right, the front group A is composed of a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and the rear group B is composed of a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3 and a biconvex lens B-4 which are closely connected with a gluing group, a negative crescent lens B-5 and a biconvex lens B-6.
Further, the air space between the negative crescent lens A-1 and the double concave lens A-2 is 5.64mm, and the air space between the double concave lens A-2 and the double convex lens A-3 is 0.12 mm; the air space between the front group A and the rear group B is 20.11 mm; the air space between the front group A and the diaphragm C is 22.52 mm; the air space between the diaphragm C and the rear group B is 8.09 mm; the air space between the biconvex lens B-1 and the biconvex lens B-2 is 0.12mm, the air space between the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 close connection glue group is 0.1mm, the air space between the negative crescent lens B-3 and the biconvex lens B-4 close connection glue group and the negative crescent lens B-5 is 0.07mm, and the air space between the negative crescent lens B-5 and the biconvex lens B-6 is 1.05 mm.
Furthermore, the mechanical structure of the lens comprises a front group main lens barrel, the rear group lens barrel is screwed at the inner middle rear part of the front group main lens barrel, and an interface lantern ring is screwed at the outer middle rear part of the front group main lens barrel; the inner front part of the front group main lens barrel is provided with a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and a BC space ring is arranged between the biconcave lens A-2 and the biconvex lens A-3; the rear group lens barrel is internally provided with a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3, a biconvex lens B-4, a close connection glue combination, a negative crescent lens B-5 and a biconvex lens B-6, a DE space ring is arranged between the biconvex lens B-1 and the biconvex lens B-2, an EF space ring is arranged between the biconvex lens B-2 and the negative crescent lens B-3, and an HI space ring is arranged between the negative crescent lens B-5 and the biconvex lens B-6.
An imaging method of a zoom lens comprises the following steps: light rays sequentially pass through the negative crescent lens A-1, the biconcave lens A-2, the biconvex lens A-3, the biconvex lens B-1, the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 from left to right to be closely connected with the glue combination, the negative crescent lens B-5 and the biconvex lens B-6 to form an image.
Compared with the prior art, the invention has the following beneficial effects: compared with the old lens with the diameter of 3.2-10mm, the purple edge of the lens is obviously improved, the F value is reduced from the original F1.5-2.6 to F1.4-2.5, and the appearance of the lens is reduced from the original 60.2mm to 54.73 mm.
Drawings
The invention is further described with reference to the following figures.
FIG. 1 is a schematic diagram of an optical system according to an embodiment of the present invention.
Fig. 2 is a schematic mechanical structure diagram according to an embodiment of the present invention.
In the figure: a front group A, C diaphragm C, B rear group B, A-1 negative crescent lens A-1, A-2 biconcave lens A-2, A-3 biconvex lens A-3, B-1 biconvex lens B-1, B-2 biconvex lens B-2, B-3 negative crescent lens B-3, B-4 biconvex lens B-4, B-5 negative crescent lens B-5 and B-6 biconvex lens B-6.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
As shown in fig. 1-2, in an optical system of the lens, a front group a, a diaphragm C, and a rear group B are sequentially arranged along a direction of light incidence from left to right, the front group a is composed of a negative crescent lens a-1, a biconcave lens a-2, and a biconvex lens a-3, and the rear group B is composed of a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3, and a biconvex lens B-4, which are closely connected to a glue group, a negative crescent lens B-5, and a biconvex lens B-6.
In the embodiment, the air space between the negative crescent lens A-1 and the biconcave lens A-2 is 5.64mm, and the air space between the biconcave lens A-2 and the biconvex lens A-3 is 0.12 mm; the air space between the front group A and the rear group B is 20.11 mm; the air space between the front group A and the diaphragm C is 22.52 mm; the air space between the diaphragm C and the rear group B is 8.09 mm; the air space between the biconvex lens B-1 and the biconvex lens B-2 is 0.12mm, the air space between the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 close connection glue group is 0.1mm, the air space between the negative crescent lens B-3 and the biconvex lens B-4 close connection glue group and the negative crescent lens B-5 is 0.07mm, and the air space between the negative crescent lens B-5 and the biconvex lens B-6 is 1.05 mm.
In this embodiment, the mechanical structure of the lens includes a front group main lens barrel 1, a rear group lens barrel 2 is screwed at the inner middle rear part of the front group main lens barrel, and an interface lantern ring 3 is screwed at the outer middle rear part of the front group main lens barrel, so as to realize the function of adjusting back focus; the inner front part of the front group main lens barrel is provided with a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and a BC space ring 4 is arranged between the biconcave lens A-2 and the biconvex lens A-3; the rear group lens barrel is internally provided with a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3, a biconvex lens B-4, a close connection glue combination, a negative crescent lens B-5 and a biconvex lens B-6, a DE space ring 5 is arranged between the biconvex lens B-1 and the biconvex lens B-2, an EF space ring 6 is arranged between the biconvex lens B-2 and the negative crescent lens B-3, and an HI space ring 7 is arranged between the negative crescent lens B-5 and the biconvex lens B-6.
An imaging method of a zoom lens comprises the following steps: light rays sequentially pass through the negative crescent lens A-1, the biconcave lens A-2, the biconvex lens A-3, the biconvex lens B-1, the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 from left to right to be closely connected with the glue combination, the negative crescent lens B-5 and the biconvex lens B-6 to form an image.
In this embodiment, the front group a lenses are fixed by dispensing, and the coaxiality of the front group main lens barrel can be effectively ensured by the processing design of the front group main lens barrel and the same machine tool, so that the coaxiality of the optical paths of the front group 3 lenses is accurately ensured. The BC space ring is mainly designed to ensure the light passing and air space between the biconcave lens A-2 and the biconvex lens A-3. And the most front end groove of the front group main lens cone is designed for dispensing and fixing the lenses, so that the assembly stability of the front group 3 lenses and the BC space ring is ensured, and the effect of intercepting stray light is achieved, so that the influence on the imaging quality of the lens is eliminated.
In this embodiment, the front end of the rear group lens barrel is provided with a first rear group pressing ring 8, the rear end of the rear group lens barrel is provided with a second rear group pressing ring 9, and the DE space ring, the EF space ring and the HI space ring are respectively used for ensuring the light and air gaps between adjacent lenses and preventing the lenses from loosening or falling out.
In the present embodiment, the optical system constituted by the lens group achieves the following optical indexes:
1. focal length: f' =3.2-10 mm;
2. relative pore size D/f' = 1/1.5;
3. target surface size: 1/1.8 inch;
4. angle of view 2 ω: 160 degrees;
5. resolution ratio: 4K;
6. TV distortion < 1%;
7. applicable spectral line range: 400 nm-700 nm.
In this example, the parameters for each lens are shown in the following table:
the above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A zoom lens, characterized in that: the optical system of the lens is sequentially provided with a front group A, a diaphragm C and a rear group B along the incident direction of light rays from left to right, wherein the front group A consists of a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and the rear group B consists of a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3 and a biconvex lens B-4 which are closely connected with a gluing group, a negative crescent lens B-5 and a biconvex lens B-6; the air space between the negative crescent lens A-1 and the double concave lens A-2 is 5.64mm, and the air space between the double concave lens A-2 and the double convex lens A-3 is 0.12 mm; the air space between the front group A and the rear group B is 20.11 mm; the air space between the front group A and the diaphragm C is 22.52 mm; the air space between the diaphragm C and the rear group B is 8.09 mm; the air space between the biconvex lens B-1 and the biconvex lens B-2 is 0.12mm, the air space between the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 which are closely connected with the bonding group is 0.1mm, the air space between the negative crescent lens B-3 and the biconvex lens B-4 which are closely connected with the bonding group and the negative crescent lens B-5 is 0.07mm, and the air space between the negative crescent lens B-5 and the biconvex lens B-6 is 1.05 mm; the mechanical structure of the lens comprises a front group main lens barrel, the rear group lens barrel is screwed at the inner middle rear part of the front group main lens barrel, and an interface lantern ring is screwed at the outer middle rear part of the front group main lens barrel; the inner front part of the front group main lens barrel is provided with a negative crescent lens A-1, a biconcave lens A-2 and a biconvex lens A-3, and a BC space ring is arranged between the biconcave lens A-2 and the biconvex lens A-3; a biconvex lens B-1, a biconvex lens B-2, a negative crescent lens B-3 and a biconvex lens B-4 are arranged in the rear group lens barrel and are closely connected with a gluing group, a negative crescent lens B-5 and a biconvex lens B-6, a DE spacer ring is arranged between the biconvex lens B-1 and the biconvex lens B-2, an EF spacer ring is arranged between the biconvex lens B-2 and the negative crescent lens B-3, and an HI spacer ring is arranged between the negative crescent lens B-5 and the biconvex lens B-6; the imaging method of the zoom lens comprises the following steps: light rays sequentially pass through the negative crescent lens A-1, the biconcave lens A-2, the biconvex lens A-3, the biconvex lens B-1, the biconvex lens B-2, the negative crescent lens B-3 and the biconvex lens B-4 from left to right to be closely connected with the glue combination, the negative crescent lens B-5 and the biconvex lens B-6 to form an image.
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| CN201910396924.0A CN110109232B (en) | 2019-05-14 | 2019-05-14 | Zoom lens and imaging method thereof |
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| CN201910396924.0A CN110109232B (en) | 2019-05-14 | 2019-05-14 | Zoom lens and imaging method thereof |
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| CN110109232A CN110109232A (en) | 2019-08-09 |
| CN110109232B true CN110109232B (en) | 2021-02-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110595623B (en) * | 2019-08-12 | 2020-10-20 | 湖北久之洋红外系统股份有限公司 | Refrigeration type thermal infrared imager |
| CN111123493A (en) * | 2020-02-24 | 2020-05-08 | 东莞市宇瞳光学科技股份有限公司 | Zoom lens |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825763A (en) * | 2009-12-31 | 2010-09-08 | 福建福光数码科技有限公司 | High resolution day and night multipoint zoom lens |
| CN104459962A (en) * | 2014-12-17 | 2015-03-25 | 福建福光数码科技有限公司 | Power 2.8-12 zoom and power focus monitoring lens and control method thereof |
| CN107102422A (en) * | 2017-05-09 | 2017-08-29 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture ultra-wide angle ultra high-definition zoom lens |
| CN109324401A (en) * | 2018-11-23 | 2019-02-12 | 福建福光股份有限公司 | 3 times of economical day and night confocal high definition glass flow zoom lens of one kind and its imaging method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160334609A1 (en) * | 2015-05-15 | 2016-11-17 | Calin Technology Co., Ltd. | Zoom lens |
| TWI742038B (en) * | 2016-04-20 | 2021-10-11 | 佳能企業股份有限公司 | Optical lens |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825763A (en) * | 2009-12-31 | 2010-09-08 | 福建福光数码科技有限公司 | High resolution day and night multipoint zoom lens |
| CN104459962A (en) * | 2014-12-17 | 2015-03-25 | 福建福光数码科技有限公司 | Power 2.8-12 zoom and power focus monitoring lens and control method thereof |
| CN107102422A (en) * | 2017-05-09 | 2017-08-29 | 东莞市宇瞳光学科技股份有限公司 | A kind of large aperture ultra-wide angle ultra high-definition zoom lens |
| CN109324401A (en) * | 2018-11-23 | 2019-02-12 | 福建福光股份有限公司 | 3 times of economical day and night confocal high definition glass flow zoom lens of one kind and its imaging method |
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