发明名称 |
Visible light sensor mechanism for constant brightness projection systems |
摘要 |
An apparatus for collecting and sensing light in a projector, comprising a cold mirror positioned directly in the incident light path from a lamp and illumination optics of the projector for reflecting a large portion of visible light towards a light imaging device while transmitting IR and UV light and a small portion of the visible light; a secondary mirror for reflecting the small portion of the visible light, an integrating box positioned to collect and integrate the small portion of visible light, a light tube in optical communication with the integrating box for further integrating and attenuating the small portion of visible light, and an electro-optic device within the light tube for measuring the small portion of visible light within the light tube and generating an electrical signal in response thereto.
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申请公布号 |
US6734957(B2) |
申请公布日期 |
2004.05.11 |
申请号 |
US20020059291 |
申请日期 |
2002.01.31 |
申请人 |
CHRISTIE DIGITAL SYSTEMS, INC. |
发明人 |
SCHMIDT TERRY;PARKIN JOHN |
分类号 |
G01J1/42;H04N5/57;H04N5/74;H04N17/00;H04N17/04;(IPC1-7):G01J1/42;G01J1/46 |
主分类号 |
G01J1/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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