LENS BODY TUBE

• Main Author: MURAKAMI TARO
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2019
• Subjects: 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

To improve in precision by making components production and measurement easy to prevent rolls.SOLUTION: The lens body tube having an optical system (1-5) for performing vibration control photography centering on one point (O') on an optical axis of a lens group (203) of a part of the optical system by tilt movement has three rolling balls (33); moving holding frame (30) for holding the lens (3) of the tilt group; a base holding frame (31) for holding the moving holding frame (30) via the rolling balls (33); ball receptacle surfaces (30b, 31b) in the above-mentioned moving holding frame (30) and the above-mentioned base holding frame (31) which receive the rolling balls, respectively, and it is characterized by making a part of the ball receptacle surface (30b) in contact with the rolling balls (33) a flat surface (30b) which contacts the ball R centering on the tilt movement central point (O').SELECTED DRAWING: Figure 13 【課題】部品作製、測定を容易にすることで精度の向上を図りロールを防止すること。【解決手段】光学系の一部のレンズ群（２０３）を光軸上の１点（Ｏ'）を中心としたチルト移動させて防振撮影を行う光学系（１−５）を持つレンズ鏡筒において、３個の転動ボール（３３）があり、チルト群のレンズ（３）を保持する移動保持枠（３０）があり、前期移動保持枠（３０）を転動球（３３）を介して保持するためのベース保持枠（３１）があり、転動ボールを受ける前記移動保持枠（３０）及び前記ベース保持枠（３１）にそれぞれボール受け面（３０ｂ，３１ｂ）があり、転動ボール（３３）と接触するボール受け面（３０ｂ）の一部をチルト移動中心点（Ｏ'）を中心とする球Ｒに接する平面（３０ｂ）にすることを特徴とする。【選択図】図１３