发明名称 Image projecting device and a prism with a curved reflection surface
摘要 An image projecting device, including an image forming element for forming an image, a light source for generating light, and an imaging optical system for imaging an image formed by the image forming element on a screen, a first prism having a first transmission surface for transmitting light generated from the light source therethrough, a reflection curved surface being a curved surface for directly reflecting light having transmitted through the first transmission surface, a reflection-transmission surface for directly reflecting light reflected from the reflection curved surface to the image forming element and transmitting light reflected from the image forming element therethrough, and a second transmission surface for transmitting light reflected from the reflection-transmission surface and light reflected from the image forming element therethrough, and a second prism for directing light having transmitted through the reflection-transmission surface of the first prism to the imaging optical system.
申请公布号 US8529072(B2) 申请公布日期 2013.09.10
申请号 US200913054854 申请日期 2009.08.04
申请人 MAEDA IKUO;RICOH COMPANY, LTD. 发明人 MAEDA IKUO
分类号 G03B21/28 主分类号 G03B21/28
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