Light gate array having gates of different areas
First Claim
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1. A dot forming light gate array for selectively transmitting light from a light source to an image receiving surface, comprising:
- a plurality of optical shutters arranged in an array of parallel first lines and parallel second lines intersecting said first lines, for selectively transmitting said light, each said optical shutter having a predetermined optical transmitting characteristic determined by a size thereof and a shape thereof, at least one of said optical shutters differing in said optical transmitting characteristic from another of said optical shutters;
means for selectively opening and closing any of said optical shutters in resonse to externally supplied electrical signals;
a light source disposed on a first side of said optical shutters such that light from said light source impinges on said first side of said optical shutters regardless of values of said electrical signals; and
a planar image receiving surface disposed on a second side of said shutters for receiving light selectively transmitted therethrough.
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Abstract
A light gate array in which each of the gates is individually controllable. Uniform light is gated through the array to form a dot-matrix image on a photosensitive material. The light gates have differing areas or shapes so that different light intensities are gated by the different gates. The array is useful when the same area of the photo-sensitive material is selectively exposed through multiple gates of different areas or shapes.
30 Citations
7 Claims
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1. A dot forming light gate array for selectively transmitting light from a light source to an image receiving surface, comprising:
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a plurality of optical shutters arranged in an array of parallel first lines and parallel second lines intersecting said first lines, for selectively transmitting said light, each said optical shutter having a predetermined optical transmitting characteristic determined by a size thereof and a shape thereof, at least one of said optical shutters differing in said optical transmitting characteristic from another of said optical shutters; means for selectively opening and closing any of said optical shutters in resonse to externally supplied electrical signals; a light source disposed on a first side of said optical shutters such that light from said light source impinges on said first side of said optical shutters regardless of values of said electrical signals; and a planar image receiving surface disposed on a second side of said shutters for receiving light selectively transmitted therethrough.
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2. A dot forming light gate array for selectively transmitting light from a light source to an image receiving surface, comprising:
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a plurality of optical shutters arranged in an array of parallel first lines and parallel second lines intersecting said first lines, each said optical shutter having a predetermined optical transmitting characteristic determined by a size thereof and a shape thereof, at least one of said optical shutters differing in said optical transmitting characteristic from another of said optical shutters, wherein said optical shutters are arranged in a matrix form with a predetermined pitch, said optical shutters being different in size from one another in each said first line of said matrix form but being equal in size to one another in each said second line thereof; and means for selectively opening and closing any of said optical shutters in response to externally supplied electrical signals. - View Dependent Claims (3, 4, 5, 6, 7)
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Specification