LENS DEVICE

To provide having an aperture unit capable of switching the aperture shape between a first shape and a second shape with a single aperture unit.SOLUTION: The aperture unit includes: multiple diaphragm blades fixed to a drive pin; a base member supporting the aperture blade; a first cam member having...

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Bibliographische Detailangaben
1. Verfasser:	UJIIE HIROTAKA
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	To provide having an aperture unit capable of switching the aperture shape between a first shape and a second shape with a single aperture unit.SOLUTION: The aperture unit includes: multiple diaphragm blades fixed to a drive pin; a base member supporting the aperture blade; a first cam member having a first cam engaging with the drive pin of the aperture blade; and a second cam member having a second cam engaging with the drive pin of the aperture blade. The aperture unit has a means for selectively switching between the first cam and the second cam.SELECTED DRAWING: Figure 3 【課題】ひとつの絞り装置で開口形状を第１形状と第２形状との間で切り替えることができる絞り装置を提供すること。【解決手段】駆動ピンが固定された複数枚の絞り羽根と、前記絞り羽根を支持するベース部材と、前記絞り羽根の前記駆動ピンに係合する第一のカムを有する第一のカム部材と、前記絞り羽根の前記駆動ピンに係合する第二のカムを有する第二のカム部材と、を備えた絞り装置において、前記第一のカムと、前記第二のカムを、選択的に切り替える手段を持つことを特徴とする。【選択図】図３