公开(公告)号：US5442415A

公开(公告)日：1995-08-15

申请号：US288697

申请日：1994-08-15

申请人： Zu W. Chao

发明人： Zu W. Chao

IPC分类号： G03B21/132 ,  G03B21/28

CPC分类号： G03B21/28 ,  G03B21/132 ,  Y10S353/03

摘要： An armless transparency projector comprises: a projector main body having an opening; a light source lamp installed inside the projector main body for emitting light needed to project a picture on a distant screen; a Fresnel lens tilted at an angle as to catch the light from the light source, and installed inside the projector main body for holding a transparency; an image reflecting mirror installed inside the projector main body for reflecting the converging light from the Fresnel lens; and a projector lens installed inside the projector main body for projecting the image converged through the aperture of the projector lens along the light axis, to the distant screen.

摘要翻译： 无臂透明投影仪包括：具有开口的投影仪主体; 安装在投影仪主体内的光源灯，用于发射在远处屏幕上投影图像所需的光; 菲涅尔透镜以一定角度倾斜以捕获来自光源的光，并且安装在投影仪主体内以保持透明度; 安装在投影仪主体内部的用于反射来自菲涅耳透镜的会聚光的图像反射镜; 以及投影仪透镜，其安装在投影仪主体内部，用于将沿投影透镜的孔径会聚的图像沿着光轴投射到远处的屏幕。