专利汇可以提供Reflective condensing system for concentrating illumination at an aperture专利检索,专利查询,专利分析的服务。并且The final condensing lens element, commonly used in a system for concentrating light at an aperture, is replaced by light restricting path means forming a transversely unobstructed, open ended light path. Spaced, opposed front surface mirrors define a portion of the path along which light is reflected back and forth between the mirror surfaces to emerge at the open end as a uniform flood of light. The absence of transverse surfaces avoids any collecting of dirt which would cause streaks to be printed on film printed with the concentrated light.,下面是Reflective condensing system for concentrating illumination at an aperture专利的具体信息内容。
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