- 专利标题: Illumination device and method using adaptable source and output format
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申请号: US11073893申请日: 2005-03-07
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公开(公告)号: US20060291020A1公开(公告)日: 2006-12-28
- 发明人: Richard Knox , Kevin Hathaway , David Kappel , Robert Fischer , Biljana Tadic-Galeb
- 申请人: Richard Knox , Kevin Hathaway , David Kappel , Robert Fischer , Biljana Tadic-Galeb
- 专利权人: Riake Corporation
- 当前专利权人: Riake Corporation
- 主分类号: G02B5/32
- IPC分类号: G02B5/32
摘要:
Systems and methods for providing illumination suitable for imaging devices such as laser projection systems, wherein the illumination pattern is adjustable by modifying one or more characteristics of a controlled angle diffuser. In one embodiment, a highly collimated (e.g., laser light) beam is passed through a holographic diffuser to create a well defined cone angle for the light emanating from each point on the diffuser. This light is focused into an illumination image that is controlled by the prescription of the diffuser. In one embodiment, the diffuser can be positioned to alternately place different regions having different prescriptions in the optical path corresponding to the illumination image. In one embodiment, the diffuser can be continually moved to eliminate speckling and “worminess” in the illumination image.