Optical apparatus and laser display apparatus having laser...

Details Optical apparatus and laser display apparatus having laser... Optical apparatus and laser display apparatus having laser...

2005-06-07

2005-06-07

Phan, James (Department: 2872)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S214100, C250S559370, C250S235000

Reexamination Certificate

active

06903857

ABSTRACT:
An optical apparatus is disclosed which has a scanner for scanning a predetermined area with a laser beam. The optical apparatus comprises: a laser source; a scanner having a scanning mirror for causing a laser beam generated by the laser source to scan; an angle sensor for sensing angles of the scanning mirror of the scanner; a fault detection block for determining whether the scanning mirror operates safely and normally based at least on angle information coming from the angle sensor; and a projection control block for controlling projection of the laser beam based on fault detection information coming from the fault detection block.

REFERENCES:
patent: 6483106 (2002-11-01), Ohtomo et al.
patent: 6497365 (2002-12-01), Kato et al.

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