发明授权
- 专利标题: Belt microfilm camera
- 专利标题(中): 皮带微缩胶片相机
-
申请号: US50731申请日: 1979-06-21
-
公开(公告)号: US4249821A公开(公告)日: 1981-02-10
- 发明人: Michael W. Rudy , Forrest L. Langford , Robert D. Therien
- 申请人: Michael W. Rudy , Forrest L. Langford , Robert D. Therien
- 申请人地址: CA Woodland Hills
- 专利权人: Terminal Data Corporation
- 当前专利权人: Terminal Data Corporation
- 当前专利权人地址: CA Woodland Hills
- 主分类号: G03B27/465
- IPC分类号: G03B27/465 ; G03B27/60 ; G03B27/32
摘要:
A microfilm camera, typically for 16 mm film, having plural coplanar friction-driven belts. The film is held to the belts by vacuum, so that the film and the belts move together.Vacuum film-loop chambers allow accurate low-inertia control of the film positioning for exposure.An intermittently rotatable shutter may be provided for appropriate exposure of the desired image upon the film.Programmable logic receives data from plural sensors and its controls drive means to correlate significant film movement and stationary periods with the functioning of opto-mechanical elements for exposing the film while it is stationary.
公开/授权文献
- USD386467S Visor cassette holder 公开/授权日:1997-11-18
信息查询
IPC分类: