Optical detecting apparatus

Details Optical detecting apparatus Optical detecting apparatus

1996-08-05

1998-05-05

Phan, James

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

250236, G02B 2608

Patent

active

057483574

ABSTRACT:
An optical detecting apparatus has a light source for emitting laser beams and a collimator and cylindrical lenses for collecting the laser beams. A mirror has first faces arranged in a polygon for rotating the mirror and reflecting some of the collected laser beams from the first faces, whereby each of the faces provides an effective width of scanning of the laser beams. Second faces also on the mirror respectively with the first faces are optically at a different angle from the first faces for reflecting others of the collected laser beams and an optical detector is spaced from the mirror for detecting the others of laser beams reflected from the second faces and producing synchronizing signals when the others of the collected laser beams reflected from the second faces are detected before or after the effective width of scanning.

REFERENCES:
patent: 5546215 (1996-08-01), Ota

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