Ultra-short TTL infrared confocal lens optical system

An infrared confocal and optical system technology, applied in optics, optical components, instruments, etc., can solve the problems of large infrared visible defocus, difficult high-definition requirements, and large TTL length, etc., to achieve infrared confocal, No purple fringing and short TTL effect on temperature drift

Pending Publication Date: 2019-03-15
UNION OPTECH
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Problems solved by technology

However, most of the current infrared confocal lens optical systems used in vehicles and security systems generally have a large amount of infrared and visible defocus, and it is difficult to achieve high-definition requirements for day and night imaging at the same time. The TTL length is large, which cannot meet many vehicles. Security occasions have requirements for the shape of the optical system, the sharpness is seriously reduced in high and low temperature environments, the temperature drift is large, the purple fringing phenomenon of the optical system is serious in the visible light mode, and the shape is large

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  • Ultra-short TTL infrared confocal lens optical system
  • Ultra-short TTL infrared confocal lens optical system
  • Ultra-short TTL infrared confocal lens optical system

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Embodiment Construction

[0047] The technical features of the present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can understand.

[0048] Such as Figure 1 to Figure 6 As shown, an ultra-short TTL infrared confocal lens optical system is sequentially provided with a first lens 1, a diaphragm 2, a second lens 3, a third lens 4, a fourth lens 5, and a filter lens from the object side to the image side. Sheet 6, protective glass 7, photosensitive chip 8;

[0049] Each lens has an object side and an image side, respectively, the first lens object side S1, the first lens image side S2, the second lens object side S3, the second lens image side S4, the third lens object side S5, the third lens The lens image side S6, the fourth lens object side S7, the fourth lens image side S8; the two sides of the filter 6 are respectively the filter object side S9 and the filter image side S10; the two sides of the protective glass a...

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Abstract

The invention discloses an ultra-short TTL infrared confocal lens optical system. The system is characterized in that a first lens, a diaphragm, a second lens, a third lens, a fourth lens, an opticalfilter, protective glass and a sensing chip are sequentially arranged from an object side to an image side. The focal length of the first lens is negative; the focal lengths of the second lens, the third lens and the fourth lens are all positive. According to the system, each lens adopts a concave and convex combination structure, by selecting a material with a suitable refractive index and reasonably distributing the focal power, infrared confocal operation can be well achieved, the lens TTL is reduced, the temperature drift amount is small, and purple fringing is not caused.

Description

【Technical field】 [0001] The invention relates to an ultrashort TTL infrared confocal lens optical system. 【Background technique】 [0002] Infrared confocal is currently the optical system technical specification proposed by the vehicle and security industries, and it is the development trend of the future market. However, most of the current infrared confocal lens optical systems used in vehicles and security systems generally have a large amount of infrared and visible defocus, and it is difficult to achieve high-definition requirements for day and night imaging at the same time. The TTL length is large, which cannot meet many vehicles. Security applications have requirements for the shape of the optical system. The sharpness is seriously reduced in high and low temperature environments, and the temperature drift is large. The purple fringing phenomenon of the optical system is serious in the visible light mode, and the shape is large. [0003] The present invention is ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/14G02B13/18
CPCG02B13/004G02B13/008G02B13/14G02B13/18
Inventor 罗吉祥肖明志
Owner UNION OPTECH
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