Low frequency optical shutter

Details Low frequency optical shutter Low frequency optical shutter

1998-03-06

2000-04-04

Phan, James

Optical: systems and elements

Light control by opaque element or medium movable in or...

Electro-mechanical

359227, 359233, 359234, 359236, G02B 2602

Patent

active

06046836&

ABSTRACT:
An optical shutter comprising a frame with an aperture and shutter blade for modulating a light beam or a particle stream passing through the aperture. The top end of the shutter blade comprises a first sector and a second sector, each sector having different optical characteristics. The bottom end of the shutter blade is coupled to a motor for pivotally rotating the shutter blade over a limited angular range in a clockwise and counter-clockwise direction such that the first sector is aligned with the aperture when the shutter blade is rotated in one direction and the second sector is aligned with the aperture when the shutter blade is rotated in the other direction.

REFERENCES:
patent: 3897153 (1975-07-01), Keenan et al.
patent: 4118619 (1978-10-01), McArthur
patent: 4168910 (1979-09-01), Barnard
patent: 4499362 (1985-02-01), Martin
patent: 4640580 (1987-02-01), Schlesinger
patent: 4907895 (1990-03-01), Everest
patent: 5055673 (1991-10-01), Schneider
patent: 5189356 (1993-02-01), Rovner
patent: 5280163 (1994-01-01), Barkan
patent: 5299053 (1994-03-01), Kleinburg et al.
patent: 5535293 (1996-07-01), Buchin

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