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Wide-spectrum image telecentric athermalization optical system

An optical system and wide-spectrum technology, which is applied in the field of wide-spectrum image-side telecentric athermal optical systems, can solve problems such as telecentric optical systems with no image-side, and achieve uniform image surface relative illuminance and good image quality. Effect

Pending Publication Date: 2022-01-04
CHANGCHUN JINGYI PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

400-1000nm is the most commonly used wavelength range in the field of remote sensing, and there is no report on an image-space telecentric optical system covering the entire wavelength range
[0003] Chinese Patent Gazette has announced a telecentric optical system with a large field of view (publication number CN102023369A). ) announced a telecentric lens for image space in space, the wavelength range is only in the visible light band, and the field of view is only 16°. In the existing public literature, there is no wide-spectrum large-field telecentric lens in the visible-near-infrared band. camera report

Method used

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  • Wide-spectrum image telecentric athermalization optical system

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment is suitable for full-band imaging of 400-1000nm, and is designed for achromatic aberration for the whole band.

[0038] The focal length of the first lens 1 is -98 ~ -75mm, the focal length of the second lens 2 is -20 ~ -18mm, the focal length of the third lens 3 is 80 ~ 110mm, the focal length of the fourth lens 4 is 36 ~ 40mm; the fifth lens 5, the focal length is 15.00-16mm, the sixth lens 6 has a focal length of 1000-3260mm, the seventh lens 7 has a focal length of -10--9mm, the eighth lens 8 has a focal length of 22-25mm, and the ninth lens 9 has a focal length of 29.00-32.00mm.

[0039] The thickness of the first lens 1 is 6.0-8.0 mm, and the distance between the rear surface and the front surface of the second lens 2 is 6.7-7.3 mm; the thickness of the second lens 2 is 2-4.7 mm, and the distance between the rear surface and the third lens 3. The distance between the front surface is 2.8-3.4mm; the thickness of the third lens 3 is 6.000-7.3mm, and ...

Embodiment 2

[0054] In this embodiment, by adjusting the thickness and spacing of each lens, it can be applied to a multi-spectral remote sensing imaging system with multiple wavelength bands to meet different specific requirements and applications. Taking five spectral channels as an example, by adjusting the thickness and spacing of each lens, it can satisfy R(630-680nm), G(520-600nm), B(400-500nm), near-infrared 1(780-895nm), near-infrared 2 (900-1000nm) remote sensing imaging with five spectral requirements.

[0055] The focal length of the first lens 1 is -270~-209, the focal length of the second lens 2 is -20~-18, the focal length of the third lens 3 is 750~2268, the focal length of the fourth lens 4 is 32~36; the fifth lens 5, the focal length is 18.30-19.5, the sixth lens 6 has a focal length of 1790.0-4207, the seventh lens 7 has a focal length of -11--9.80, the eighth lens 8 has a focal length of 17.5-20.0, and the ninth lens 9 has a focal length of 32.0-34.

[0056] The thickne...

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Abstract

The invention relates to a wide-spectrum image telecentric athermalization optical system. The system is composed of a first lens and a second lens with negative diopters, a third lens and a fourth lens with positive diopters, a diaphragm, a fifth lens and a sixth lens with positive diopters, a seventh lens with negative diopters, and an eighth lens and a ninth lens with positive diopters, which are arranged in sequence along a light incidence directio, wherein the first lens is a meniscus lens, the object surface side is a convex surface, the image surface side is a concave surface, the second lens is a biconcave lens, the third lens is a meniscus lens, the object surface side is a concave surface, the image surface side is a convex surface, the fourth lens is a biconvex lens, the fifth lens is a biconvex lens, the object surface side of the sixth lens is a concave surface, the image surface side of the sixth lens is a convex surface, the seventh lens is a biconcave lens, the eighth lens is a biconvex lens, the ninth lens is a biconvex lens, or the object surface side is a convex surface and the image surface side is a concave surface. The wide-spectrum image telecentric athermalization optical system can adapt to the environment temperature change of -50-60 DEG C, and meets the requirement of a large view field.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, in particular to a wide-spectrum image square telecentric athermalized optical system, which can be used in aerospace remote sensing imaging systems. Background technique [0002] With the application of aerospace remote sensing in different fields more and more widely, the optical imaging module in the remote sensing system is gradually developing in the direction of large field of view and wide band. Considering that the relative illuminance of the image plane is proportional to the fourth power cosine of the image square field of view, especially for large field of view imaging systems, when the light has a large field of view on the image side, serious uneven illumination will occur, such as The telecentric structure will improve the uniformity of illumination of the image plane in the field of remote sensing imaging. 400-1000nm is the most commonly used wavelength range in the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/22G02B7/02
CPCG02B13/005G02B13/22G02B13/06G02B7/028
Inventor 罗晓霞孙金霞王健
Owner CHANGCHUN JINGYI PHOTOELECTRIC TECH CO LTD
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