专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5528288A Illumination control system for a film scanner 失效
标题翻译：电影扫描仪照明控制系统
公开(公告)号：US5528288A
公开(公告)日：1996-06-18
申请号：US312162
申请日：1994-09-26
申请人： Richard J. Sandor , Steven Sitter , Drew D. Summers , Andrew F. Kurtz , Charles P. Divito
发明人： Richard J. Sandor , Steven Sitter , Drew D. Summers , Andrew F. Kurtz , Charles P. Divito
IPC分类号： H04N5/253
CPC分类号： H04N5/253
摘要： In an illumination system for a film telecine scanner of the type adapted to provide a line of illumination on the image frames of a film which is supported for movement in a film gate of the scanner, an improved light control system for adjusting the amount of light that is delivered from a light source to an integrating cylinder to take into account fluctuations in intensity of the light source and desired intensity changes in the line of illumination upon a change of scene in the image frames of the film as the film is being scanned. The light control system comprises an aperture defining mechanism, a position servo regulator that maintains the aperture at a desired aperture opening despite disturbances tending to change the aperture between aperture changes, and an intensity servo regulator that takes into account the lamp intensity in resetting the aperture to a new position in response to a commanded light intensity related to a scene change, whereby aperture changes may be effected within the time of scanning a single image frame. The aperture defining mechanism employs first and second movable blades placed at a location in the optical path and movable between a full open aperture position outside the optical path and to one of a plurality of stopped down aperture defining positions interrupting the optical path and the resulting illumination line intensity in the course of scanning a single image frame.
摘要翻译：在一种用于胶片电视电影扫描器的照明系统中，适用于在被支持用于在扫描仪的胶片门中移动的胶片的图像帧上提供一列照明线，该改进的光控制系统用于调节光量其被从光源传送到积分圆筒，以考虑当光线被扫描时胶片的图像帧中的场景变化时光源的强度的变化和照明线中的期望的强度变化。光控制系统包括孔限定机构，位置伺服调节器，其将孔径保持在期望的孔径开口，尽管倾向于改变孔径变化之间的孔径，以及强度伺服调节器，其考虑了在重新设定孔径时的灯强度响应于与场景变化相关的指令光强度而到新的位置，由此可以在扫描单个图像帧的时间内进行光圈改变。孔限定机构使用放置在光路中的位置处的第一和第二可动刀片，并且可在光路外部的完全打开的孔径位置与中断光路的多个停止向下孔径限定位置之一之间移动，并且产生的照明在扫描单个图像帧的过程中的线强度。

IPRDB

热门服务

关于我们

友情链接

联系方式