?500 mm阵列透镜波前采样器的研制

设计加工了一个由484块单透镜组成的大口径阵列透镜，并设计了一套光束波前采样及测量实验系统。在实验过程中，合理匹配了阵列透镜波前采样器、CCD、成像屏和图像采集处理各系统参数，并讨论了该系统的动态范围和采样精度。利用平行光标定了该系统，且测量了大口径波前的像差，测量值与理论值相吻合。实验证明了阵列透镜波前采样器用于波前采样的技术可行性。

Temperature changes in PC-type HgCdTe detector irradiated by in-band and out-of-band laser beams

A model which combines drift-diffusion equation and heat transmission equation is established. Considering two laser absorption mechanics, including intrinsic carriers inter band transition and free carriers inner-band transition, and the interaction of detector temperature and material properties, such as lifetime concentration mobility of carriers and absorption coefficient, the temperature responses in PC-type HgCdTe detector irradiated by in-band and out of band laser beams are calculated. The relationship between laser power density, irradiating time and the temperature rise is discussed．Results show that in-band laser irradiation can increase out-of-band laser absorption, and is an effective way to reduce damage thresholds.