Transmission type optical deflector

Details Transmission type optical deflector Transmission type optical deflector

1998-06-16

1999-10-12

Spyrou, Cassandra

Optical: systems and elements

Prism

With refracting surface

359211, 359831, G02B 504, G02B 2608

Patent

active

059662530

ABSTRACT:
A transmission type optical deflector wherein a prism holder is supported by a yoke member to rotate about a principal axis through an elastic device. A wedge-shaped transmission prism is provided on the prism holder to transmit and refract light. The prism holder and yoke member are respectively provided with a coil and a permanent magnet secured thereto, to produce a rotational motion of the prism holder in the forward and reverse directions about the principal axis due to an electromagnetic function. The transmission prism is partly cut away at the thick portion thereof so that the center of gravity of the transmission prism is identical to the principal axis in a section in which the principal axis appears as a point and the transmission prism appears as a wedge-shape.

REFERENCES:
patent: 3572887 (1971-03-01), Leitzsch
patent: 4118109 (1978-10-01), Crawford et al.
patent: 4878720 (1989-11-01), Hanke et al.
patent: 4960313 (1990-10-01), Yamanaka
patent: 5247508 (1993-09-01), Tanaka
patent: 5249173 (1993-09-01), Tanaka
patent: 5559639 (1996-09-01), Nakagishi et al.
patent: 5760944 (1998-06-01), Minakuchi et al.

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