Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-06-25
1999-01-26
Spyrou, Cassandra C.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359223, 359857, G02B 2608, G02B 508
Patent
active
058644172
ABSTRACT:
A laser audio-visual unit is provided that includes a laser pattern displaying device having a full-image spectral device therein. The laser pattern displaying device is operated in different control modes, such as automatic, manual or sound control modes, to project various laser patterns to be displayed onto a wall or screen or other objects. The displaying device includes a housing, a fixed plate, a fixed rack and a mounting stand. The full-image spectral device includes a first reflecting mirror connected to a first rotating motor, serving to reflect light rays. On the first rotating motor there is provided a biasing device to provide for adjustment, by way of the varying rpm of the first rotating motor, of an inclination angle of the first reflecting mirror. In addition, there is a second reflecting mirror connected to the second rotating motor, used to reflect the light rays reflected from the first reflecting mirror, and to adjust, by way of the varying rpm of the second rotating motor, the inclination angle of the second reflecting mirror. Further, one or more full-image plates are provided to cause diffraction of the light rays reflected from the second reflecting mirror, to increase the spatial variation of scanned patterns and visual effects. The laser beam projected from the laser head impinges upon the reflecting disc of the operating first motor, and is reflected to the reflecting disc of the operating second motor, and then projected to a wall or other fixture to display various laser patterns that are fixed or repeated again and again.
REFERENCES:
patent: 4006970 (1977-02-01), Slater et al.
patent: 4871904 (1989-10-01), Metlitsky et al.
patent: 5293265 (1994-03-01), Aleshin et al.
patent: 5600478 (1997-02-01), Stevens
Robinson Mark A.
Spyrou Cassandra C.
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