Optical shutter device

Details Optical shutter device Optical shutter device

1998-09-10

2000-07-04

Blankenship, Howard B.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 67, 359246, 359290, G03B 2772, G03B 2754

Patent

active

060846577

ABSTRACT:
An optical shutter device wherein a light emitted from a light source is allowed to be incident to a polarization shutter chip through a fiber array and then the light is caused to pass through the chip by turning on a voltage to be applied to electrodes connected to transmittable portions corresponding to pixels, so that a receptor surface is lighted through an imaging lens array. Light which is incident to the polarization shutter chip at an angle .theta..sub.0 is reflected from electrode vertical surfaces, and then the light outgoes from the transmittable portions in the form of leakage light. However, the aperture angle of a lens unit of the imaging lens array is set smaller than the incident angle .theta..sub.0, and thus the light (which were incident) at the angle .theta..sub.0 (leakage light) is not focused on the receptor surface by the lens unit.

REFERENCES:
patent: 4887104 (1989-12-01), Kitano et al.
patent: 5011271 (1991-04-01), Saito et al.
patent: 5745280 (1998-04-01), Kitano

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