高增益探测对 InGaAs焦平面探测器在微光夜视条件下成像有重要意义。设计了一款 InGaAs焦平面用的高增益低噪声 64×64元读出电路。读出电路输入级采用 CTIA模式（电容负反馈放大），通过计算发现输入级运算放大器热噪声是主要噪声源，采用单端替代差分运放将输入级噪声降低 26%。同时，研究积分电容和增益、满阱容量、噪声的关系，将积分电容降低到 1 fF，实现了超高增益和低噪声探测。读出电路采用 0.18 .m工艺设计，像元中心距为 30 .m。经过 PEX（寄生参数提取）参数提取，实际积分电容为 0.94 fF，经过测试芯片整体功耗低至 24.1 mW，电路噪声电子数为 4.37e。

为求解硅片表面微小粒子在任意线偏振平面入射光照射下的散射光光强分布，选择了基于Mie散射的杨氏模型为依据，推导了该模型下散射光强空间分布的计算方法，并给出了0．54μm球形粒子在垂直、倾斜入射下光强空间分布的模拟计算结果，以及入射平面第一象限内散射光强与国外已发表实验结果的比较．

A new dual-frequency laser displacement measurement interferometer with nanometer precision has been developed. An eight-pass optical subdivision technology is proposed to improve resolution based on commercial interferometers. A static positioning error measuring method has been used to examine the precision and repeatability of the laser interferometer. An optical resolution of 1.24 nm and an accuracy of nanometer scale have been achieved.

The ABCD law of parameter q for fundamental-mode Gaussian beam is deduced in this paper. The result shows that the changes of focal length and focal depth are not related to the orders of the Gaussian beam modes when focus lens moves along optical axis in a large range, indicating that the ABCD law of parameter q can be used for any order modes. A laser focusing setup is designed, and the response characteristics of oil pressure system therein are also studied.