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Finder optical system

阅读:881发布:2022-02-05

专利汇可以提供Finder optical system专利检索,专利查询,专利分析的服务。并且PURPOSE: To make a video camera, etc. small-sized, by placing a penta roof prism between a finder master lens and a focusing screen, and forming an erecting image on the focusing screen by the penta roof prism.
CONSTITUTION: A finder luminous flux reflected by a beam splitter of a finder optical system passes through a finder master lens 21, is reflected by the first reflection surface 20b of a penta roof prism 20 and the second reflection surface 20c being a roof surface, and after that, forms an erecting image on a focusing screen 22. Also, this erecting image can be observed by an observer's eyes E through an eyepiece 23. According to such a finder optical system, an optical path extending from the beam splitter 1 to the focusing screen 22 can be lengthened by bending the optical path in the penta roof prism, and a video camera, etc. can be made small-sized.
COPYRIGHT: (C)1983,JPO&Japio,下面是Finder optical system专利的具体信息内容。

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