Multispectral refraction-reflection type optical system

Abstract

The invention discloses a multispectral refraction-reflection type optical system. The multispectral refraction-reflection type optical system comprises a refraction-reflection type afocal telescope system and a long-wave infrared imaging system, wherein the refraction-reflection type afocal telescope system comprises a spherical fairing, a scanning plane reflecting mirror, a primary reflecting mirror and a secondary reflecting mirror; the long-wave infrared imaging system comprises a tilted reflecting mirror, an image offsetting rotating prism, an optical imaging component group and a detector; and collimation lens groups are arranged between the primary reflecting mirror and the secondary reflecting mirror and close to the primary reflecting mirror. The multispectral refraction-reflection type optical system has the advantages that: the spatial dimension is compact, the weight of an optical system is reduced, the system stiffness is improved, and the high-precision optical axis pointing is facilitated; and the multispectral refraction-reflection type optical system is suitable for meeting the requirement of comprehensively considering quick search, the precise pointing of aiming lines, the detection of multispectral broad wave bands and system compactness, and has high radiation transmission efficiency, simple aberration balance, and low processing, detection, assembly and adjustment cost.

Description

Technical field [0001] The invention belongs to the technical field of opto-electromechanics, and specifically relates to a multi-spectral refractive optical system. Background technique [0002] In the field of aerospace, military, and scientific research, the technical solutions related to the present invention mainly have five characteristics: 1) Larger diameter (diameter> 150 mm) optical systems mostly use reflective main beam reduction systems, and then use refractive optical systems for beam conversion and aberration balance; 2) the shape, size, weight, center of gravity, vibration, temperature and other spaces of the opto-electromechanical system There are strict requirements for adaptability to the aerospace environment; 3) In systems that require high-precision line-of-sight pointing, use a composite optical axis control technology that combines large-scale coarse pointing and small-range precise pointing; 4) Broadband imaging active-passive Detection and spectrum ana...

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Problems solved by technology

[0004] For schemes 1) and 2), the Cassegrain system uses a parabolic primary reflector and a hyperbolic secondary reflector, or in other forms of deformation, uses two hyperboloids, a paraboloid plus an ellipsoid, etc., involving Large-aperture aspheric surface processing, testing and assembly technology is more difficult and costly; for the second) option, the overall moment of inertia of the optical system is larger, and the difficulty of servo control increases; for the first) and 2) options, the Three to six spherical reflectors combined with planar reflectors form a total reflector optical system to achieve super multi-spectral detection, but the field of view is small, and the radiation transmission efficiency is not high due to the shielding between reflectors; for type 3) For the scheme, the field of view of the off-axis three-mirror system is small, and the processing, testing and assembly technology is difficult and costly; for the fourth) scheme, it is difficult and costly to realize a large-aperture optical system. Difficult to implement multispectral high-performance systems

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