近年来，磁流变抛光作为一种确定性加工方法已成为获得高精度非球面的重要手段。作者以回转对称二次抛物面为例，分析了磁流变抛光中使用抛光轮校正工件位置的理论方法，并通过实验在Φ230 mm熔石英样件上验证对刀理论，分别在X方向和Y方向以少于3次的调整次数校正工件位置，实现了X方向、Y方向偏置量均低于0.009 mm；采用磁流变抛光技术对工件进行了修形实验验证，加工后面形精度RMS由λ/7收敛至λ/40。实验结果表明：作者提出的非球面工件位置对刀校正方法简单、可靠，能够很好地对工件进行精确定位，利于高精度非球面磁流变抛光加工。

With characteristics of high-temperature resistance,corrosion resistance and high hardness,sapphire is wide-ly used in weapon communication industry,aviation and aerospace field.The ground sapphire surface topography has a great influence on the subsequent processing and use.To study the effect of various processing factors on the surface quality of sapphire,the grinding experiments of different particle sizes,different bonds were designed.The surface roughness and mi-crostructure feature of ground sapphire was detected by white light interferometer and scanning electron microscope,respec-tively.Experimental results show that when the grinding depth in the sub-micron range,compared with metal bond grinding wheel,resin bond grinding wheel is conducive to higher quality sapphire surface.Reducing the grain diameter is helpful to improve the quality of processing surface.The higher speed of grinding wheel is not conducive to obtain sapphire surface with lower roughness.Ground sapphire surface form irregular pits easily,and smooth step pits associated with sapphire sin-gle crystal cleavage fracture.With the increase of grinding depth,sapphire surface cleavage fracture feature is more signifi-cant.

针对异形光窗高精度成型加工中存在的问题,介绍了异形光窗的特点和成型技术原理,从镜面保护、定位工装的设计、尺寸测量与补偿算法及铣磨参数优化等4个关键问题开展试验研究,实现异形光窗的微应力精确无损成型,其线性尺寸误差≤0.03 mm,二维角度误差≤20″,斜面倾斜角度误差≤1.2′,表面疵病≤Ⅳ,满足隐身飞机对异形光窗的指标要求.

The mid-infrared bandpass filter is widely used as an observation channel in applications such as flight,meteorology and remote sensing.The peak transmission and full width at half maximum(FWHM) are key specifications of the bandpass filter,which depend on the film structure and its design.The mid-infrared bandpass filter was successfully prepared using a new method with Ge and ZnS materials on Ge substrate.The selection of materials and the design principles of this method were introduced in detail,the film structure is also given.By using ZZSX-1100 device,this kind of filter was deposited with ion beam assisted process.The mea-surement results show that its peak transmission is more than 87% and the FWHM is 70 nm.The filter has good optical spectrum stability and adherence.The film structure is simple and easy to implement.

Diamond-like carbon(DLC) films,grown by enhanced pulsed arc ion plating on silicon substrate,were studied with Raman spectroscopy.The results show that as compared with the control sample,the magnetic filter significantly increases the density of sp~3 in the DLC films and improves its optical properties.Moreover,its refractive index is close to that of the bulk diamond,2.4,and its optical band-gap widens.

在几何光学和高斯光束传输理论的基础上,利用矩阵光学原理和高斯光束耦合理论对准直器的原理和损耗进行计算和分析,并提出一种能有效降低插入损耗的方法.

Reducing the insert loss of collimator is the difficult problem to produce this kind of component.Based on the theory of the geometrical optics and the Gaussian beam transforming,this paper makes use of the principle of the matrix optics and Gaussian beam coupling to calculate and analyze the principle of collimator and the insert loss.An effective method that is the match between grin_lens and spherical_lens is put forward.The experiments prove that the method can effectively reduce the insert loss.This method will be gradually introduced into the process of production to enhance the efficiency.