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六、1989年的红外技术要克服的三大技术障碍是(1)目前在折射光学系统中使用的昂贵的红外透射玻璃,(2)复杂的机械光学扫描器,(3)必须在低温下操作的探测器。随着折转的反射光学系统
VI. The Three Major Technical Barriers to Overcoming Infrared Technology in 1989 are (1) expensive infrared transmissive glasses currently used in refractive optical systems, (2) complex mechanical optical scanners, and (3) must be operated at low temperatures Detector. Reflective optical system with refraction