Optical scan apparatus having jitter amount measuring means

Details Optical scan apparatus having jitter amount measuring means Optical scan apparatus having jitter amount measuring means

1993-04-08

1994-12-06

Hjerpe, Richard

Facsimile and static presentation processing

Facsimile

Synchronization

358481, 358474, 358296, 250236, H04N 136

Patent

active

053716086

ABSTRACT:
A scan optical apparatus is provided with a first light source for generating a beam for scan optically modulated based on an image signal, a second light source for generating a beam for jitter amount detection, a scanning device for deflecting the beams from the first light source and from the second light source to scan a surface to be scanned, an optical member disposed in the vicinity of the surface to be scanned or at a position substantially optically equivalent to the surface to be scanned, and a detecting device for detecting a beam reflected by the optical member and deflected by the scanning device. The optical member may have reflective portions and nonreflective portions which are repeatedly arranged in a main scan direction, or may be a corner cube array in which a plurality of corner cubes are arranged in the main scan direction. Further, the surface to be scanned may be a recording medium in a recording apparatus.

REFERENCES:
patent: 4616132 (1986-10-01), Kessler
patent: 4761660 (1988-08-01), Lee
patent: 4831247 (1989-05-01), Ishizaka
patent: 4950888 (1990-08-01), Hamada
patent: 5115121 (1992-05-01), Bianco et al.

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