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“洛杉机科学实验室”在1972年和1973年日全蚀期间,曾用带有扫描干涉仪和视频记录系统的机载望远镜观测日冕辐射分布图。借助口径250mm相对孔径为f/8.0的双胶合消色差物镜,通过窄波束透射滤光片扫描“法布里—珀罗”干涉仪的压力提供了所选射线0.05埃的光谱分辨率。可变增益通道板式象增强器(用纤维光学元件与硫化锑光导摄象管相连)可用作高灵敏度图象探测器。系统的灵敏度最高时能记录入射在增强器光阴极上小于5×10~(-9)焦耳/米~2的视频图象信号。光导管摄象机采用每秒60场每场500线逐行扫描的电视制式。全电视信号记录在标准的视频磁带上,并将磁带记录的全电视信号数字化,然后再送到计算机去处理。
During the total eclipse of 1972 and 1973, the Los Angeles Science Laboratory had observed coronal radiation patterns using an airborne telescope with a scanning interferometer and video recording system. The pressure of the Fabry-Perot interferometer scanned by the narrow beam transmissive filter provided a spectral resolution of 0.05 angstroms for the selected ray with a 250 mm aperture double-appencant objective with a relative aperture of f / 8.0. Variable gain channel plate image intensifier (with fiber optics and antimony sulfide photoconductor connected) can be used as a high sensitivity image detector. When the sensitivity of the system is highest, the video image signal incident on the intensifier photocathode less than 5 × 10 -9 J / m 2 can be recorded. Light tube cameras use 60 fields per second for each 500 line progressive scan television system. The full TV signal is recorded on a standard video tape and the entire television signal recorded by the tape is digitized and then sent to a computer for processing.