A compact wide-spectrum optical system

Abstract

The compact infrared wide-spectrum optical system provided by the present invention includes an integrated catadioptric lens, a reflector and a lens. The rear surface of the anti-lens is the transmissive surface; the light first passes through the outer ring area S1 of the front surface of the integrated lens to reach the rear surface S2 of the integrated lens, and then transmits through the rear surface S2 of the integrated lens to reach the mirror S3; the light is reflected by the mirror to reach The central area of ​​S4 on the rear surface of the integrated catadioptric lens transmits through the central area, and the light reaches the central area of ​​S5 in front of the integrated catadioptric lens. S6 transmits, passes through the lens surface, S7, S8, and finally passes through the diaphragm 1 to form an image on the detector surface, realizing a 1μm-5μm wide-spectrum optical system, which has the advantages of compact structure, easy installation and good stability.

Description

technical field [0001] The invention belongs to the technical field of space-based remote sensing and relates to a compact wide-spectrum optical system. Background technique [0002] At present, due to the limitation of the spectral responsivity of the detector in the traditional guided infrared system, the imaging is mainly divided into three bands: near-infrared band 0.7 μm ~ 1.5 μm; mid-wave infrared band 3 μm ~ 5 μm, long-wave infrared band 8 ~ 12 μm. However, in complex battlefield environments, target camouflage, jamming bombs and other interference methods, a single band is difficult to meet the guidance system's identification of true and false targets. The multi-spectral optical system can overcome the above disadvantages. However, due to material, volume, and structural limitations, it is more difficult to design miniaturized broadband optical systems. [0003] In order to realize the wide-spectrum optical system, there are currently three main design methods: on...

AI Technical Summary

Problems solved by technology

However, due to material, volume, and structural limitations, it increases the difficulty of designing miniaturized wide-spectrum optical systems

[0003] In order to realize the wide-spectrum optical system, there are currently three main design methods: one is to use a total transmission optical system, which has many mirrors and a longer structure, and the transmittance of the whole system is low, so it is difficult to achieve a high optical efficiency; the other Is the use of off-axis optical system, using three off-axis optical reflective optical system

This kind of optical system has a large space, difficult installation and adjustment, and high processing cost; the third type is the traditional reentrant optical system, which has a compact structure, but the disadvantage is that in the optical system that requires cold diaphragm matching, a secondary imaging optical structure is required , there are many lenses, it is difficult to install and adjust

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