Method of recording signals on bands by means of laser beams and apparatus for carrying out the method

PCT No. PCT/HU80/00009 Sec. 371 Date Aug. 11, 1981 Sec. 102(e) Date Aug. 11, 1981 PCT Filed Dec. 11, 1980 PCT Pub. No. WO81/01767 PCT Pub. Date Jun. 25, 1981.A method for recording character or marking signals by multi-beam laser technique, in which the characters are recorded in multi-rastered band...

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Hauptverfasser:	TOKES, SZABOLCS, MARKUS LENK, ATTILA, PODMANICZKY, ANDRAS
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CALCULATING CINEMATOGRAPHY COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY ELECTROPHOTOGRAPHY FREQUENCY-CHANGING HANDLING RECORD CARRIERS HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LINING MACHINES MAGNETOGRAPHY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHOTOGRAPHY PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION PRESENTATION OF DATA PRINTING RECOGNITION OF DATA RECORD CARRIERS SELECTIVE PRINTING MECHANISMS STAMPS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING TYPEWRITERS
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Zusammenfassung:	PCT No. PCT/HU80/00009 Sec. 371 Date Aug. 11, 1981 Sec. 102(e) Date Aug. 11, 1981 PCT Filed Dec. 11, 1980 PCT Pub. No. WO81/01767 PCT Pub. Date Jun. 25, 1981.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 illuminated 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 producing 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.