凸非球面的面形检测是光学检验中的一大难题,提出了一种利用半反半透凹面自准单透镜检验凸非球面反射镜的方法。单透镜由凸、凹两个球面构成,凹面为半反半透自准面,使经非球面反射的光线可沿原路返回,从而实现补偿检验。该方法具有结构简单、检测能力强、无中心 遮拦等优点。基于三级像差理论推导了检验系统的初始结构计算公式,给出了不同凸非球面反射镜检验系统的关键参数关系曲线。以 r03=2000 mm 、 e2=－2.4 的凸非球面反射镜为例,求解相应初始结构参数,利用Zemax软件优化得到了系统残余波像差小于 0.05λ 。设计和仿真结果表明所提出的半反半透凹面自准单透镜的检验方法有利于检验各类凸非球面反射镜。

介绍了一种新型的空间望远镜，通过改变光学系统焦距，可以提高任意感兴趣视场的成像分辨率。光学系统有四个反射镜组成，包括两个静态非球面反射镜和两个面形动态可调非球面反射镜.通过改变两个可变形反射镜的面形，系统焦距可以在399 mm到558 mm范围内进行动态调整.和机械式变焦系统相比，此主动变焦系统避免了光学元件的精密移动，有效减少反应时间。分析了此系统的成像质量，给出了0°、0.51°、0.7°不同视场的弥散斑：1.6 μm、1.0 μm、1.7 μm，及传递函数：在68 lp/mm 时，MTF曲线值大于0.7.此新型成像技术还可以有效减少数据传输链带宽需求，在遥感领域具有广阔的应用前景.

In the field of optical interconnecting network and in super fast photonic computing system, the tree architecture and optical nonlinear materials can play a significant role. Nonlinear optical material may find important uses in optical switching. Optical switch using nonlinear material makes it possible for one optical signal to control and switch another optical signal through nonlinear interaction in a material. In this communication such materials have been successfully exploited to design an all-optical tree-net architecture, which can be utilized for time division multiplexing scheme in all-optical domain.

The stimulated emission in the quasi-periodic photonic crystals is investigated in this paper. It was found that there are some interesting phenomenons in that structure. The lasing is more abundant and stronger compared with that in periodic crystals. More stimulated emission peaks appear when the size and the gain increase, and some lasing peaks are independent on incident direction, isotropic. These lasing peaks maybe come from the localization of the disorder in the quasi-periodic photonic crystals.

An airborne pushbroom hyperspectral imager (APHI) with wide field (42 deg. field of view) is presented. It is composed of two 22 deg. field of view (FOV) imagers and can provide 1304 pixels in spatial dimension, 124 bands in spectral dimension in one frame. APHI has a bandwidth ranging from 400 to 900 nm. The spectral resolution is 5 nm and the spatial resolution is 0.6 m at 1000-m height. The implementation of this system is helpful to overcome the restriction of FOV in pushbroom hyperspectral imaging in a more feasible way. The electronic and optical designs are also introduced in detail.

Recently, ArF immersion lithography has been considered as a promising method after ArF dry lithography by a factor of refractive index n of the liquid filled into the space between the bottom lens and wafer, in the case of 193-nm exposure tools, water (n = 1.44) has been found as the best liquid. We explore the NAσ's dependence of depth of focus (DOF) under 3/4 annular and 3/4 quasar illumination by resist imaging simulation. Line/space pairs of line-to-space ratios 1:1, 1:2, 1:4 on binary mask are considered. Finally, we explored the high NA's dependency of DOF and gave the explanation for the peak value of DOF through three-beam imaging process, MicroCruiser 2.0, Prolith version 8.0.2 and k_2 factor based on the Rayleigh equation.

In order to realize variable contrast in the minimum resolvable contrast (MRC) measuring target in the visible imaging system, a novel technique is presented, which adopts two integrating spheres to illuminate two sides of target respectively and the different contrasts can be achieved by regulating the luminance in two integrating spheres. This technique can make the contrast be regulated more conveniently. Based on this technique, the MRC measuring device is developed. This device can be used in all kinds of trial fields. The expanded uncertainty of measuring MRC is less than 3%.

The concept of mobile atmospheric laser communication (MALC) is introduced in this paper. Atmospheric attenuation, turbulence-induced scintillation and beam wander cause deep fades in the beam power and degrade the optical channel. The optical transceiver presented in this paper is designed for a MALC test system. Currently achievable hardware performance capabilities for the MALC terminals are used as input parameters to the analysis. A novel optical transceiver structure is designed. Link margin is analyzed using the MALC analysis software, our optical link analysis program. Data rate, bit-error rate, prime transmit power requirements, optical link margin, pulse width, background signal, aperture quality and atmospheric effects drive the optical transmitter requirements. Results are displayed as required aperture size, aperturenumber and the spacing between apertures for a given range and terminal moving speed. The aperture size is parameterized by data rate, transmitting optical power and wavelength. Si-APD and CCD are selected as the main receive detectors. The receiver aperture, detector size (diameter), receiver speed and sensitivity are the main factors to consider in the design of the receiver.

A set of system based on personal computer for the bi-directional reflectance distribution function (BRDF) measurement was developed, whose laser wavelengths cover 0.6328, 1.34, 3.39, and 10.6 μm from visible to infrared. Stray light in BRDF measurement system was analyzed. It can be reduced and suppressed by the design of the system light path in BRDF measurement system, the choice of the measuring scheme, the processing to the optoelectronic signal, and the radiation control of the optical components and mechanical equipments. So the minimum measurable value of BRDF is less than 10^(-5)/sr.