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Compact type coaxial refraction and reflection type telescope objective

A telescopic objective lens, catadioptric technology, applied in the direction of optical components, optics, instruments, etc., can solve the problems of limited function, heavy weight, etc., and achieve the effects of eliminating heat dissipation difference, compact structure, and improving system performance

Pending Publication Date: 2019-01-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A small spherical lens is used near the image surface, which is lower in cost and lighter in weight, but its effect is limited. When designing a high-performance camera, the primary and secondary mirrors cannot be changed from aspherical mirrors to spherical mirrors.
The correction mirror at the front of the system has a strong ability to correct aberrations, but there is a problem of heavy weight

Method used

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  • Compact type coaxial refraction and reflection type telescope objective
  • Compact type coaxial refraction and reflection type telescope objective
  • Compact type coaxial refraction and reflection type telescope objective

Examples

Experimental program
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Effect test

Embodiment 1

[0021] This embodiment provides a compact coaxial catadioptric telescopic objective lens, the working wavelength range of the objective lens is 450-750nm, the effective focal length is 1400mm, the F / # is 10.5, and the full field of view is 1.5°×1.5°.

[0022] See attached figure 1 , which is a schematic diagram of the structure of a compact coaxial catadioptric objective lens provided in this embodiment. Negative lens 5, the first positive lens 6 of the rear group, the second positive lens 7 of the rear group, the third lens 8 of the rear group and the focal plane 9. The telescopic objective lens system is rotationally symmetrical about the main optical axis, and the surfaces of all components are spherical, and all components are made of the same glass; the aperture stop is located at the main reflector 3 . The front group of negative lenses 1, the front group of positive lenses 2 and the main reflector 3 have a central hole. The incident light from the ground scene is refr...

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Abstract

The invention discloses a compact type coaxial refraction and reflection type telescope objective. The surfaces of all components of the telescope objective are spherical surfaces. The telescope objective comprises a front-group concave lens, a front-group positive lens, a main reflecting mirror, a Mangin mirror, a rear-group concave lens and three rear-group positive lenses, wherein the telescopeobjective is in rotational symmetry relative to a main optical axis, and an aperture diaphragm is positioned on a main reflecting mirror; the middle of the front-group concave lens, the middle of thefront-group positive lens and the middle of the main reflecting mirror are independently provided with a hole; after an incident ray from ground scenery is refracted through the front-group lenses, the incident ray reaches the main reflecting mirror; after the incident ray is focused, the incident ray passes through the front surface, the rear surface and the front surface of the Mangin mirror insequence without hindering in sequence; and after the incident ray is refracted by the rear-group concave lens and three rear-group positive lenses in sequence, the incident ray passes through the center hole of the main reflecting mirror without hindering to finally reach an image surface. The telescope objective has the advantages of long focal length, low cost, small volume, light weight, compact structure, good imaging quality, easiness in processing and adjustment and the like.

Description

technical field [0001] The invention relates to a compact coaxial catadioptric objective lens, which is suitable for a long focal length, low cost, light and small telescopic objective lens imaging system, and belongs to the technical field of optical imaging. Background technique [0002] Space remote sensing can obtain a large amount of ground information, so it is widely used in meteorological observation, resource inspection, map surveying, environmental monitoring and other fields. However, the current high-resolution remote sensing cameras have disadvantages such as large size, heavy weight, high development costs and high launch costs, which restrict the development of the remote sensing industry. [0003] In order to obtain high image quality, the optical camera payload needs to have high spatial resolution, requiring the optical system to have a long focal length. Under the requirement of long focal length and the limitations of volume and quality, light, small, hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B17/08
CPCG02B17/0808
Inventor 刘莉沈为民
Owner SUZHOU UNIV
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