发明名称 |
Projecting apparatus with spherical screen, more particularly for advertising purposes |
摘要 |
A screen-forming sphere is made of a front translucent half-sphere and of a rear half-sphere which is opaque except in a central region. An image projector is situated behind the screen and has a front face comprising a platen mounted in front of the optic of the image projector. The platen contains a rotary polarization filter rotated by a first motor. The filter is occultable by a rotary flap mounted on spindles rigidly connected to two rotary vertically aligned disc members which rotate in synchronism under action of a second motor.
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申请公布号 |
US4859053(A) |
申请公布日期 |
1989.08.22 |
申请号 |
US19860919440 |
申请日期 |
1986.10.16 |
申请人 |
NICOLAS, PIERRE |
发明人 |
NICOLAS, PIERRE |
分类号 |
G03B21/56;G03B21/10;G09F19/18 |
主分类号 |
G03B21/56 |
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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