G - Physics – 11 – B
Patent
G - Physics
11
B
352/31.1, 352/53
G11B 7/00 (2006.01) G03G 15/32 (2006.01) G06K 15/12 (2006.01)
Patent
CA 1176370
ABSTRACT OF THE INVENTION A method for recording character or marking signals by multi-beam laser technique, in which the characters are recorded in multi-rastered bands in such a way that the character information is inverted, whereby the recording surface is illum- inated by the laser beams at each location that do not comprise characters or marks, In character locations the surface is not illuminated. The gaps between adjacent bands are illuminated by separate band gap illuminating laser beams. By using this method the electrophotographic image recording can be solved by means of conventional inexpensive positive copiers in which image reversal does not take place. The apparatus for carrying out the method comprises a Bragg cell, a control unit for pro- ducing several raster scanning laser beams, and oscillators for generating additional band gap illuminating laser beams. An inverting unit is inserted in the path between the information source and the control unit to perform electronic image reversal.
367032
Lenk Attila M.
Podmaniczky Andras
Tokes Szabolcs
Fetherstonhaugh & Co.
Magyar Tudomanyos Akademia Szamitastechnikai Es Automatizalasi K
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