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国外对光学仪器的杂光早就开展了研究。诸多文章对可见光系统杂光的计算、测量和消除提出不少看法及措施,但有关红外仪器方面的文章却不多见。光学仪器的杂光被定义为进入象面内的非成象光线。可见光系统的杂光由光学零件、机械零件的反射和散射产生。杂光的光源大部处在仪器之外。红外系统的杂光(确切地说应该是杂散辐射)既来自仪器之外,又来自仪器本身。在大部分情况下,仪器管壁的辐射
Foreign miscellaneous light on optical instruments have long been studied. Many articles put forward many opinions and measures on the calculation, measurement and elimination of stray light in the visible light system. However, articles on infrared instruments are rare. The stray light of optical instruments is defined as the non-image light entering the image plane. Visible light system from the optical components, mechanical parts of the reflection and scattering generated. Most of the light stray light outside the instrument. The stray light of the infrared system (to be exact stray radiation) comes from both the instrument and the instrument itself. In most cases, the wall of the instrument is radiated