公开(公告)号：US4868663A

公开(公告)日：1989-09-19

申请号：US239422

申请日：1988-09-01

申请人： Jean L. Grimaldi ,  Raymond Dellion ,  Pierre Michaud

发明人： Jean L. Grimaldi ,  Raymond Dellion ,  Pierre Michaud

IPC分类号： H04N1/113 ,  H04N9/11

CPC分类号： H04N9/11 ,  H04N1/113

摘要： The invention relates to a device for scanning still images as applicable in particular to high-definition television (HDTV) systems. In accordance with customary practice, the entire still image is converted by an optical system having an oscillating mirror to an image which passes in front of a linear sensor having photosensitive elements. Diffusion of the optical system causes detachment of dark areas which are adjacent to bright areas. In order to prevent this detachment, the movement of a shutter provided with slits is synchronized with the movement of the mirror so as to occult part of the image which passes in front of the sensor, thus leaving only the zone located at the level of the sensor.

摘要翻译： 本发明涉及一种特别适用于高分辨率电视（HDTV）系统的扫描静止图像的装置。 根据惯例，通过具有振动反射镜的光学系统将整个静止图像转换成通过具有感光元件的线性传感器前方的图像。 光学系统的扩散导致与明亮区域相邻的暗区域的分离。 为了防止这种脱离，设置有狭缝的活门的移动与镜的运动同步，以隐藏通过传感器前方的图像的一部分，因此仅留下位于 传感器。