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A catadioptric off-axis large field of view imaging optical system

A technology of imaging optics and a large field of view, which is applied in the field of optical applications, can solve the problems that the imaging quality of the optical system is easily affected, and achieve good imaging quality, reduced detection and assembly difficulty, and small size.

Active Publication Date: 2022-08-09
CHANGGUANG SATELLITE TECH CO LTD
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Problems solved by technology

[0003] The invention aims to solve the problem in the prior art that the imaging quality of the optical system is easily affected due to the distortion being sensitive to the change of the field of view of the wide-format camera, and further provides a catadioptric off-axis large field of view imaging optical system

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  • A catadioptric off-axis large field of view imaging optical system

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specific Embodiment approach 1

[0035] Embodiment 1: Combining Figures 1 to 2 This embodiment is described, a catadioptric off-axis large field of view imaging optical system, which includes a coaxial refracting mirror group, an off-axis reflective mirror group and an image plane 11, wherein the coaxial refracting mirror group includes a coaxial light along the incident direction of the light A number of lenses arranged in order on the axis, the off-axis mirror group includes a first mirror 9 and a second mirror 10 used off-axis, and the first mirror 9 is an even-order aspheric surface, which is relative to the coaxial The off-axis angle of the optical axis of the refracting lens group is 8°, the second reflecting mirror 10 is a spherical surface, and the off-axis angle relative to the optical axis of the coaxial refracting lens group is 10.4°.

[0036] In this application, different lenses are used to combine each other and reasonably distribute the optical power. The coaxial refracting lens group is respo...

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Abstract

A fold-and-reflection off-axis large field of view imaging optical system belongs to the technical field of optical applications. The invention solves the problem in the prior art that the image quality of the optical system is easily affected because the distortion is sensitive to the change of the field of view of the wide-format camera. The coaxial refracting mirror group includes a number of lenses arranged in sequence along the light incident direction and the optical axis, the off-axis mirror group includes a first mirror and a second mirror used off-axis, and the first mirror is a pair of mirrors. A secondary aspheric surface, and the second reflecting mirror is a spherical surface. The coaxial refracting lens group assumes the main optical power, and corrects aberrations such as on-axis aberration, some primary off-axis aberrations and chromatic aberrations, so that the sensitivity of the off-axis reflector group is reduced to a certain extent. The reflector can correct the distortion and off-axis aberration residual of the system, and the second reflector can calibrate the exit angle of the chief ray in each field of view of the system, so as to realize the telecentric focusing imaging of the image side.

Description

technical field [0001] The invention relates to a refraction off-axis large field of view imaging optical system, which belongs to the technical field of optical applications. Background technique [0002] Space-to-Earth observation optical systems have gone through the development stage from refractive type to reflective type, from coaxial optical system to off-axis optical system. Refraction optical system is difficult to achieve large aperture and lightweight design due to the limitation of optical materials. The reflection system is less limited by materials, which is convenient for lightweight design, has no chromatic aberration at all, and has high system transmittance. Compared with traditional refractive optical systems, off-axis reflective optical systems have the characteristics of small size, light weight and no chromatic aberration, so they are widely used in telescope systems and space observation systems. Space remote sensing optical systems mostly use catadio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B17/08G02B27/00
CPCG02B17/0816G02B27/0025
Inventor 钟兴刘润山孟遥张坤王远航
Owner CHANGGUANG SATELLITE TECH CO LTD
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