viewing optical system meaning in English

观察光学系统

Portable long - range infrared surveillance system thermovision 2000 is a state - of - the - art long - range platform mounted thermal imaging system , offering unmatched performance with its long - wave gen - iii qwip sensor and internal three field of view optical system
Thermovision 2000是尖端科技的长距离安装有红外热像系统的监视平台，提供无与伦比的第三代长波qwip quantum well infrared photondetector量子阱红外光电探测器的性能和内置三种不同光学视场角25