-
公开(公告)号:US4118114A
公开(公告)日:1978-10-03
申请号:US698116
申请日:1976-06-21
IPC分类号: G02B1/04 , G02B3/08 , G03B21/132 , G03B21/14
CPC分类号: G03B21/132 , G02B1/04 , G02B3/08 , Y10S353/03
摘要: An overhead projector that uses as a condensing lens a linear echelon lens structure comprising a combination of linear echelon lens elements between the light source and stage of the projector to minimize glare emanating from the condensing lens.
摘要翻译: 一种高架投影仪,其使用线性梯形透镜结构作为聚光透镜,其包括在投影仪的光源和舞台之间的线性梯形透镜元件的组合,以最小化从聚光透镜发出的眩光。