CAJ | 학술논문

红外成像光谱仪适用于火山活动探测、森林火灾监测、城市化影响分析、地球表面研究及军事伪装识别等方面。文中基于Dyson中继系统，设计使用波长范围为7.5~10μm的长波红外成像光谱仪，采用凹面衍射光栅分光，系统F数达到1.2，视场角18°，空间分辨率为1 mrad，光谱分辨率为50 nm，NETD小于0.3 K,调制传递函数接近衍射极限，光学系统体积为72 mm×39 mm×39 mm。该系统具有集光本领强、固有像差小、结构紧凑等优点。对其杂散热辐射分析表明，采用实入瞳作为冷光栏和整体制冷的方法，能有效地抑制光机系统自身的热辐射。
홍외성상광보의괄용우화산활동탐측、삼림화재감측、성시화영향분석、지구표면연구급군사위장식별등방면。문중기우Dyson중계계통，설계사용파장범위위7.5~10μm적장파홍외성상광보의，채용요면연사광책분광，계통F수체도1.2，시장각18°，공간분변솔위1 mrad，광보분변솔위50 nm，NETD소우0.3 K,조제전체함수접근연사겁한，광학계통체적위72 mm×39 mm×39 mm。해계통구유집광본령강、고유상차소、결구긴주등우점。대기잡산열복사분석표명，채용실입동작위랭광란화정체제랭적방법，능유효지억제광궤계통자신적열복사。
Infrared imaging spectrometers are applied to volcano behavior detection, forest fire survey, urbanization effect analysis, terrestrial composition and change monitoring, and camouflage recognition. In this paper, based on Dyson relay, a long wave infrared imaging spectrometer with wavelength range of 7.5 to 10μm was designed, which used a concave diffraction grating as its dispersive element. Its F number reached 1.2, field angle of view was 18° and spatial pixel resolution was 1 mrad, spectral resolution was 50 nm and noise equivalent temperature difference (NETD) was less than 0.3 K. The size of this designed optical system was about 72 mm ×39 mm ×39 mm, and its modulation transfer function approached to diffraction limitation. It has advantages of high throughput, low inherent aberration, and compactness. Analysis of its stray thermal radiation shows that its own thermal radiation of optical-mechanical system can be effectively suppressed by use of real entrance pupil as cool stop and of cryogenic optics.