专利名称：Focusing device for optical system发明人：Yoshiaki Horikawa申请号：US06/372374申请日：19820427公开号：US04521108A公开日：19850604
摘要：A focusing device for optical systems wherein, in order to make it possible touse an image photographing element and to focus an image without vibrating a body, ona light intercepting plate to be rotated in a plane intersecting at right angles with anoptical axis around the optical axis in or near an exit pupil or a position conjugate with theexit pupil of an optical system, light intercepting parts and non-light intercepting partsare so arranged as to alternately vary the relative positions of the light interceptingparts and non-light intercepting parts appearing within the pupil whenever the lightintercepting plate makes 1/4 rotation. The light intercepting plate is rotated eithercontinuously or intermittently by 1/4 rotation. The light intercepting parts and non-lightintercepting parts appearing within the pupil are alternately varied vertically orhorizontally within the visual field.
申请人：OLYMPUS OPTICAL CO., LTD.
代理机构：Cushman, Darby & Cushman
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