Share-aperture broad-band infrared optical system

Abstract

The invention discloses a share-aperture broad-band infrared optical system, and belongs to an infrared optical system. The share-aperture broad-band infrared optical system realizes long wave infrared imaging and broad-band infrared spectral measurement, and solves the problems of the optical system that the optical road layout is restricted, the size is large and the cost is high. The share-aperture broad-band infrared optical system comprises a card type lens, a beam splitter mirror, a reflecting mirror, a plurality of lens groups, an FPA interface and an optical fiber interface. Light (2-12 [mu]m) enters the card type lens to be focused, and is split through the beam splitter mirror, 50% of long wave infrared light (8-10 [mu]m) transmits through the lens groups for aberration correction, an image surface is focused at an imaging interface again, the other 50% of long wave infrared light (8-10 [mu]m) and infrared light (2-10 [mu]m as well as 10-12 [mu]m) is subjected to infrared reflection through the lens groups and are reflected again by the reflecting mirror to be focused at the optical fiber interface. The share-aperture broad-band infrared optical system is compact in integral structure, convenient and flexible to use and relatively low in cost, can be integrated for spectrum correlated detection equipment, realizes automatic detection and tracking, and can be widely applied to the civil and military fields of environmental monitoring, infrared guidance and the like.

Description

technical field [0001] The invention belongs to infrared optical systems, in particular to a common-aperture wide-band infrared optical system. Background technique [0002] As the development trend of modern remote sensing technology, map correlation detection is a great progress of remote sensing technology in the late last century and a frontier technology in the field of remote sensing. According to the structure and characteristics of the electromagnetic spectrum, the infrared information of the target refers to the difference between the target and the background radiation, reflection and scattering characteristics acquired by the infrared spectrum sensor, which includes the radiation and reflection of the fine spectral (line) bands of short, medium and long-wave infrared and scattering properties. The common-aperture wide-band infrared optical system can simultaneously acquire short-, medium-, and long-wave infrared radiation energy, which is a qualitative leap in im...

AI Technical Summary

Problems solved by technology

However, the common-aperture wide-band infrared optical system is quite difficult to design. Due to domestic limitations in infrared materials, processing capabilities, and coating technology, it is especially difficult to achieve wide-band infrared optical systems without using special components and special materials. Common aperture, to correct various aberrations at the same time

Moreover, most remote sensing infrared optical systems work in a relatively harsh ambient temperature range. Infrared optical materials have a large temperature coefficient of refraction index. Changes in ambient temperature will cause thermal defocus of the infrared optical system and result in image quality degradation.

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