发明名称 |
IMAGE PROJECTOR EMPLOYING A SPECKLE-REDUCING LASER SOURCE |
摘要 |
An image projector having one or more broadband lasers designed to reduce the appearance of speckle in the projected image via wavelength diversification. In one embodiment, a broadband laser has an active optical element and a nonlinear optical element, both located inside a laser cavity. The broadband laser generates an output spectrum characterized by a spectral spread of about 10 nm and having a plurality of spectral lines corresponding to different spatial modes of the cavity. Different individual spectral lines effectively produce independent speckle configurations, which become intensity-superimposed in the projected image, thereby causing a corresponding speckle-contrast reduction. |
申请公布号 |
WO2010132623(A2) |
申请公布日期 |
2010.11.18 |
申请号 |
WO2010US34631 |
申请日期 |
2010.05.13 |
申请人 |
ALCATEL-LUCENT USA INC.;CHEN, GANG;RYF, ROLAND |
发明人 |
CHEN, GANG;RYF, ROLAND |
分类号 |
G03B21/20;G03B21/14;H04N5/225 |
主分类号 |
G03B21/20 |
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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