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US5479292A Infrared wide-angle single lens for use in an infrared optical system 失效
用于红外光学系统的红外广角单镜头

Infrared wide-angle single lens for use in an infrared optical system
摘要:
In an infrared wide-angle single lens which is as constructed as of a positive meniscus lens, the following conditional expressions (1) through (6) are satisfied:(1) -50.0 th
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