基于数学形态学的电晕日盲紫外图象处理方法研究

针对紫外图象目标比较弱、对比度比较低和区域目标特点采用多尺度形态滤波方法对紫外图象进行处理,实验证明该方法提高了图像的信噪比,弱化了噪声,提取了电晕放电区域,而且该算法易于并行处理,硬件实现容易。

Fabrication of blazed gratings used in ultraviolet region by holographic ion beam etching based on photoresist melting

A novel technology to manufacture holographic ion beam etched diffraction gratings based on surface therrnokinematics is presented. The surface roughness of photoresist gratings is solved by this technology. According to this technology, a holographic ion beam etched blazed grating of 1200 l/mm for use in the ultraviolet region is manufactured. The experimental results show that the grating has good surface quality, low stray light and high diffraction efficiency. In addition, the performance of thes gratings satisfies the operating requirements of ultraviolet spectrograph.