Optical deflector comprising a movable member having a high rigi

Details Optical deflector comprising a movable member having a high rigi Optical deflector comprising a movable member having a high rigi

1998-12-07

2000-09-19

Spyrou, Cassandra

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359223, 359224, 359212, 359213, 359214, G02B 2608

Patent

active

061220892

ABSTRACT:
An optical deflector has a supporter. A movable plate has a mirror face for reflecting light. At least one elastic member is provided for connecting the movable plate and the supporter and holding the movable plate so that the movable plate can deflect. A driving coil is formed in a ring form on the movable plate in such a manner that the driving coil passes near a movable end of the movable plate when the movable plate deflection-moves. A magnet and a magnetic yoke generate a closed magnetic circuit for applying a magnetic field to the driving coil in the direction substantially parallel to the plane of the movable plate. The magnet or the magnetic yoke generating the closed magnetic circuit is arranged at a position opposite to the movable end of the movable plate outside the driving coil, and at a position near the movable plate inside the driving coil to form a magnetic gap.

REFERENCES:
patent: 5606447 (1997-02-01), Asada
patent: 5912608 (1999-06-01), Asada

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