摘要
从谐衍射元件的理论出发,讨论了谐衍射透镜在消色差和消热差时的特性。利用谐衍射透镜独特的色散和消热差特性,再结合其谐振特性,设计并制成了适用于-30℃~70℃的3μm^5μm和8μm^10μm双波段红外消热差的光学系统。该系统通过采用折反结构,仅需锗作为材料,体积小,重量轻,结构简单。结果表明,该系统能够在两个波段内同时较好地校正系统的色差,在要求的视场内得到接近衍射极限的成像质量,具有良好的消色差和减热差特性。该系统经红外传递函数测试仪测试,得出的实际MTF值也基本接近衍射极限。
From the characteristic of harmonic relief patterns,the athermalization and achromatism of harmonic diffractive element have been studied in the paper. Based on these characteristics, an athermalized and achromatized dual-band （3μm～5μm and 8μm～ 10μm） IR system in temperature range of -30℃～70℃ was designed. The optical system used only one kind of optical material germanium and had simple structure of Cassegrain with small volume and light weight. The aberration of the system were well corrected over dual-bands and diffraction-limited performance was achieved in required temperature range. The optical system has been tested by Ealing that the tested value of MTF is closely approximate to the diffracted one.
出处
《光学仪器》
2006年第3期61-65,共5页
Optical Instruments
关键词
谐衍射元件
消热差
红外
双波段
harmonic diffractive element
athermalization
infrared
dual-band
作者简介
陈杰（1980-），男，浙江绍兴人，硕士研究生，主要从事光学系统设计。
