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Laser-COM-with-line-deflection-mirror-inertia-compensation

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Laser COM with line deflection mirror inertia compensation

Details

Inventors: Ohnishi, Masahiro;
Assignee: Fuji Photo Film Co., Ltd. (Minami-ashigara, JP)
Primary Examiner: Griffin; Robert L.
Assistant Examiner: Orsino, Jr.; Joseph A.
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn and Macpeak

A vertical line deflection, mirror 8 in a laser COM is driven by a staircase waveform generated in response to scan line synchronizing signals. To avoid data character compression or expansion following a stop or data line skipping operation due to the mirror inertia, video signal generation is delayed for several scan lines following such an operation to allow the mirror to reach a constant rotational speed.

DETAILED DESCRIPTION Accordingly, an object of this invention is to provide a method and apparatus for light beam scanning in which the above-described character image distortion due to compressed or expanded intervals between adjacent scan lines is eliminated.
Another object of the invention is to provide a high-speed light beam scanner in which, even following stop or data line skip operations, the recorded character images are regularly arranged.
Briefly, and in accordance with this invention, these and other objects are implemented by the provision of a vertical line deflection mirror in a laser COM driven by a staircase waveform generated in response to scan line synchronizing signals.
To avoid data character compression or expansion following a stop or data line skipping operation due to the mirror inertia, video signal generation is delayed for several scan lines following such as operation to allow the mirror to reach a constant rotational speed.

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