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研究了折射 /衍射光学元件的温度效应及红外系统的设计理论及具体实例 ,给出了在红外 3.2～4 .5 μm波段 ,5°视场范围 ,冷光栏效率 10 0 % ,在 - 4 0～ 80℃温度变化范围情况下的红外混合减热差系统的设计结果。结果表明 ,使用折射 /衍射光学系统的减热差设计方案 ,可令相应的传统光学系统减少一片元件 ,并且节省了昂贵的硒化锌红外材料。不仅能在较大视场内得到接近衍射极限的成像质量 ,较宽的温度工作范围 ,而且结构简单 ,体积小 ,重量轻。
The temperature effect of refraction / diffractive optical element and the design theory and the specific examples of the infrared system are studied. The results show that in the infrared range of 3.2-4.5 μm, the field of view of 5 °, the efficiency of the cold bar is 100% ~ 80 ℃ temperature range of the case of the infrared mixing subtraction system design results. The results show that the use of refractive / diffractive optical system designed to reduce the thermal aberration, the corresponding conventional optical system can be reduced by a piece of element, and save the expensive zinc selenide infrared material. Not only in the larger field of view near the diffraction limit of the imaging quality, wide temperature range, and the simple structure, small size, light weight.