Optical deflector and light beam scanning apparatus having a...

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

Reexamination Certificate

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C359S224100

Reexamination Certificate

active

07619798

ABSTRACT:
An optical deflector and a light beam scanning apparatus characterized by stable amplitude and speed wherein the fluctuation of the resonant frequency resulting from various factors such as a temperature change is corrected to a predetermined level, and the amplitude of the resonant scanner is kept to a predetermined level. An electromechanical transducer is used as a control element to control the potential difference resulting from the electric charge occurring in the control element caused by rotational vibration of the optical deflector, whereby the fluctuation of the resonant frequency resulting from various factors such as a temperature change is corrected to a predetermined level and the amplitude of the resonant scanner is kept at a predetermined level. This arrangement provides an optical deflector and a light beam scanning apparatus characterized by stable amplitude and speed.

REFERENCES:
patent: 5694237 (1997-12-01), Melville
patent: 6049407 (2000-04-01), Melville
patent: 6331909 (2001-12-01), Dunfield
patent: 3-154019 (1991-07-01), None
patent: 5-45603 (1993-02-01), None
patent: 5-142050 (1993-06-01), None
patent: 8-146334 (1996-06-01), None

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