发明名称 |
Star field projection apparatus |
摘要 |
A projection apparatus for generating a moving star field and a cloud-like effect comprises a means for generating a cloud-like effect using at least one non-coherent light source, a means for generating a moving star field using at least one coherent light source and a means for regulating and supplying electric power. The means for generating cloud-like effect using at least one non-coherent light source comprises at least one pair of condenser lenses and an interferential filter wheel rotated by a motor, disposed between at least one pair of condenser lenses. The means for generating the moving star field using a coherent light source comprises a grating wheel rotated by a motor and a diffractive optical element disposed between the at least one coherent light source and the grating wheel. |
申请公布号 |
US8057045(B2) |
申请公布日期 |
2011.11.15 |
申请号 |
US20090540069 |
申请日期 |
2009.08.12 |
申请人 |
JOHNSON RANDY E.;BLISS HOLDINGS LLC |
发明人 |
JOHNSON RANDY E. |
分类号 |
G03B21/14;F21S6/00;G03B21/26;G09B23/00;G09B27/00 |
主分类号 |
G03B21/14 |
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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