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US 6,297,898 B1Granted
Optical deflection device
AssigneeMinolta Co., Ltd.
InventorsYasushi Tanijiri, Hiroaki Ueda, Kenji Ishibashi, Yasushi Kobayashi, Takatoshi Ishikawa, Soh Ohzawa, Hideki Nagata
Life of this patent
Estimating the term…
Abstract
An optical deflection device for deflecting light by a mirror mounted on the tip of a rod-like torsion spring which oscillates at near resonance frequency. An optical deflection device which produces a large amplitude by exerting control to avoid variation in the natural oscillation frequency of the torsion spring (including mirror) regardless of temperature fluctuation.
Claims15
An optical deflection device comprising:
- a spring;
- a reflective mirror attached to the spring;
- an oscillator for oscillating the spring;
- a detector for detecting amplitudes of oscillation of the reflective mirror;
- and
- alteration means for changing a natural oscillation frequency of the spring in accordance with the amplitudes detected by the detector.
3 more elements
An optical deflection device comprising:
- a spring;
- a reflective mirror which oscillates via the oscillation of a free end of the spring;
- an oscillator for oscillating the spring near a resonance frequency of the spring;
- and
- alteration means for changing a natural oscillation frequency of an oscillation system including the spring and the reflective mirror.
2 more elements
An optical deflection method comprising the steps of:
- oscillating a spring having a reflective mirror;
- detecting amplitudes of oscillation of the reflective mirror;
- and
- changing a natural oscillation frequency of the spring in accordance with the amplitudes detected by the detector.
1 more element
Dependencies are inferred from the claim text.