基本信息:
- 专利标题： Illumination control system for a film scanner
- 专利标题（中）：电影扫描仪的照明控制系统
- 申请号：EP94107922.0 申请日：1994-05-24
- 公开(公告)号：EP0632650A2 公开(公告)日：1995-01-04
- 发明人： Sandor, Richard J., c/o Eastman Kodak Company , Sitter, Steven, c/o Eastman Kodak Company , Summers, Drew D., c/o Eastman Kodak Company , Kurtz, Andrew F., c/o Eastman Kodak Company , Divito, Charles P., c/o Eastman Kodak Company
- 申请人： EASTMAN KODAK COMPANY
- 申请人地址： 343 State Street Rochester, New York 14650-2201 US
- 专利权人： EASTMAN KODAK COMPANY
- 当前专利权人： EASTMAN KODAK COMPANY
- 当前专利权人地址： 343 State Street Rochester, New York 14650-2201 US
- 代理机构： Schmidt, Peter, Dipl.-Ing.
- 优先权： US73832 19930608
- 主分类号： H04N5/253
- IPC分类号： H04N5/253
摘要：
The light control system for the illumination system of a film telecine scanner comprises an aperture defining mechanism (35,36) and 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 film frame. The intensity servo regulator takes into account non-linear intensity gain of the aperture defining mechanism and its velocity of movement to establish a new aperture. The position servo regulator develops a position error signal by comparison of the instantaneous position to the previously set position and restores the previously set position.
The aperture defining mechanism comprises first and second movable blades placed at a location in the optical path.
摘要（中）：
The aperture defining mechanism comprises first and second movable blades placed at a location in the optical path.
用于胶片电视电影扫描仪的照明系统的光控制系统包括一个光圈限定机构（35,36）和一个位置伺服调节器，该光圈控制系统将光圈保持在所需的光圈开度，尽管干扰趋于改变光圈变化和强度 伺服调节器，其响应于与场景变化相关的命令光强度，在将光圈重置到新位置时考虑到灯强度，由此可以在扫描单个胶片帧的时间内实现光圈变化。 强度伺服调节器考虑孔径限定机构的非线性强度增益和其运动速度以建立新的孔径。 位置伺服调节器通过将瞬时位置与预先设定的位置进行比较来产生位置误差信号，并恢复之前设定的位置。 孔限定机构包括放置在光路中的位置处的第一和第二可动刀片。
公开/授权文献:
- EP0632650B1 Illumination control system for a film scanner 公开/授权日：1999-02-03