Optical system for space astronomical observation infra-red telescope

Abstract

The invention discloses an optical system for a space astronomical observation infra-red telescope, which comprises a reflection-type focal-free main optical system (1), a single-axis scanning mirror (2) and a subsequent imaging optical system (3), wherein in the reflection-type focal-free main optical system (1), ray is incident into a reflexing mirror (6) via an eccentric light through hole after being successively reflected by a main mirror (4) and a secondary mirror (5), and is reflected into the single-axis scanning mirror (2) successively by the reflexing mirror (6) and a prism (7); the single-axis scanning mirror (2) ensures that the aiming line of the optical system of the space astronomical observation infra-red telescope is constant by one-dimensional linear scanning; the incident ray of the reflection-type focal-free main optical system (1) is reflected to the subsequent imaging optical system (3); the subsequent imaging optical system (3) comprises an off-axis reflection type system, a color separation filter and a focal plane; the off-axis reflection type system corrects the aberration of the reflection-type focal-free main optical system (1); and the emergent ray of the reflection-type focal-free main optical system (1) is divided into two or more than two spectral channels by the color separation filter to be imaged to a corresponding focal plane.

Description

technical field [0001] The invention belongs to the technical field of aerospace optical remote sensors, and relates to an optical system suitable for a low-temperature infrared telescope for space astronomical observation. Background technique [0002] With the development of infrared detector technology, cryogenic optical technology and space cooling technology, the sensitivity of astronomical observation infrared telescopes is getting higher and higher, in order to detect the weak infrared signals from comets in the solar system to galaxies on the edge of the universe. [0003] The Space Infrared Astronomical Observation Telescope can realize whole-sky area survey and detection, detect cold and dark celestial objects, and discover new planetary systems, brown dwarfs and stars. The main purpose is to study the physical and chemical evolution process of the interstellar medium, the origin of organic molecules in the universe, the evolution process of brown dwarfs and exopla...

AI Technical Summary

Problems solved by technology

At present, the research work of deep cryogenic optical technology has just begun. In order to effectively suppress the stray radiation of the system and realize the splitting of different spectral bands, the structure of the astronomical telescope needs to be compressed by the optical path many times, so that the optical path is as compact as possible, and it is not difficult to Affects the imaging quality, and finally forms a complex secondary imaging system. Such a complex structure brings great difficulties to optical design

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