公开(公告)号：US5534955A

公开(公告)日：1996-07-09

申请号：US424635

申请日：1995-04-19

申请人： Michiro Tuchida ,  Masaaki Nomura ,  Soichiro Kimura ,  Ko Aosaki ,  Tatsuo Kitami

发明人： Michiro Tuchida ,  Masaaki Nomura ,  Soichiro Kimura ,  Ko Aosaki ,  Tatsuo Kitami

IPC分类号： G03B21/08 ,  G03B21/28 ,  G03B21/00

CPC分类号： G03B21/08 ,  G03B21/28 ,  Y10S353/03

摘要： A reflection prevention film coats a backside of a stage glass by a vacuum evaporation and coating, etc. A light from a metal halide lamp is not reflected on the back of the stage glass by the reflection preventing film, and is transmitted through the stage glass and is reflected on a surface of the stage glass and a transparent manuscript. The light reflected on the surface of the stage glass and the transparent manuscript enters a projection lens unit and appears as a spot light on a screen, but because the light is not reflected on the backside of the stage glass, so that the amount of the light, which causes the spot light, can be reduced. As a result, the spot light on the screen is inconspicuous.

摘要翻译： 反射防止膜通过真空蒸发和涂布等涂覆在台玻璃的背面。来自金属卤化物灯的光不被反射防止膜反射在舞台玻璃的背面，并且透过舞台玻璃 并且反射在舞台玻璃的表面和透明原稿上。 反射在舞台玻璃的表面上的光和透明原稿进入投影透镜单元，并在屏幕上显示为斑点光，但由于光没有反射在舞台玻璃的背面，所以， 可以减少引起点光的光。 结果，屏幕上的聚光灯不显眼。