Composite scanning unit for reducing speckle noise and laser...

Details Composite scanning unit for reducing speckle noise and laser... Composite scanning unit for reducing speckle noise and laser...

2007-08-24

2010-11-02

Cherry, Euncha P (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

Reexamination Certificate

active

07826118

ABSTRACT:
A composite scanning unit for reducing speckle noise and a laser projection system employing the composite scanning unit are provided. The composite scanning unit includes a plurality of mirror surfaces disposed along a rotation axis, wherein at least two of the plurality of mirror surfaces sequentially scan diffraction beams having different orders on the screen.

REFERENCES:
patent: 7042606 (2006-05-01), Yang et al.

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