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Scanlaser Printing Process

IP.com Disclosure Number: IPCOM000090283D
Original Publication Date: 1969-Mar-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Roshon, DD: AUTHOR

Abstract

The high-speed display of characters is achieved by the apparatus of drawing A. It employs a thin character mask through which a laser beam is selectively directed onto a display plane by a prismatic lens. This causes the characters to be displayed along a horizontal display line. The laser beam is issued from a scanlaser and passes through a collimating lens before being directed upon the character mask. The output of the scanlaser consists of a multiplicity of possible output beams. Each is divergent with its cone axis parallel to the laser axis. The horizontal and vertical coordinates of the beam axis are determined by the mode selected in the scan laser. Each divergent beam passes through the collimating lens to assume different directions in space.

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Scanlaser Printing Process

The high-speed display of characters is achieved by the apparatus of drawing A. It employs a thin character mask through which a laser beam is selectively directed onto a display plane by a prismatic lens. This causes the characters to be displayed along a horizontal display line. The laser beam is issued from a scanlaser and passes through a collimating lens before being directed upon the character mask. The output of the scanlaser consists of a multiplicity of possible output beams. Each is divergent with its cone axis parallel to the laser axis. The horizontal and vertical coordinates of the beam axis are determined by the mode selected in the scan laser. Each divergent beam passes through the collimating lens to assume different directions in space.

The character mask consists of an X-Y array of character apertures Xc by Ych where Xc is the number of columns in an output line and Ych is the number of different characters. Each columnar position has a complete selection of characters available. The mask can consist of a fused silica plate, coated with a fusion-bonded metallic layer, into which the apertures are formed by etching or photoengraving. The mask is heat-resistant and highly reflective on the laser side. In order to provide linearity of position on the output line, the mask can be formed as a spherical surface. The characters can either be normal or reversed depending upon the direction of viewing of the output line.

In the...