Laser projection apparatus

Details Laser projection apparatus Laser projection apparatus

2007-12-18

2008-11-11

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S207110, C353S099000

Reexamination Certificate

active

07450286

ABSTRACT:
A laser projection apparatus includes: laser devices; incident optical systems, each of which is supplied with light beam from the laser device; a scanning device for two-dimensionally scanning the light beam; and a projection optical system for projecting the light beam from the scanning device onto a screen; wherein the scanning device includes a resonant drive mirror for performing deflection in a main scanning direction, and the projection optical system includes at least two nonaxisymmetric-shaped reflecting mirrors and a light source image is present between the first mirror, which is most closest to the scanning device, and the second mirror, thereby achieving a laser projection apparatus using a projection optical system which is easy to downsize, has velocity uniformity and has successful projection characteristics and brightness.

REFERENCES:
patent: 6859329 (2005-02-01), Kobayashi
patent: 7264360 (2007-09-01), Hatakeyama et al.
patent: 7385745 (2008-06-01), Ishihara
patent: 2006/0139718 (2006-06-01), Ishihara
patent: 2008/0143979 (2008-06-01), Konno
patent: 2004-252012 (2004-09-01), None
patent: 2006-178346 (2006-07-01), None

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