VERFAHREN ZUM OPTISCHEN AUFZEICHNEN UND LESEN VON INFORMATIONEN

A method of optically recording and reading items of information uses a recording material 3 which contains at least one radiation-sensitive compound having at least one inhomogeneously dispersed absorption band in the UV and/or visible and/or IR spectral region. Under the action of narrow-band lase...

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Bibliographische Detailangaben
Hauptverfasser:	PAUL,..WILD,URS, RENN,ALOIS,DR, HOFMANN,MANFRED,DR
Format:	Patent
Sprache:	ger
Schlagworte:	AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY COLOUR PRINTING 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 ELECTROGRAPHY FREQUENCY-CHANGING HOLOGRAPHIC PROCESSES OR APPARATUS HOLOGRAPHY INFORMATION STORAGE LINING MACHINES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PERFORMING OPERATIONS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS STATIC STORES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method of optically recording and reading items of information uses a recording material 3 which contains at least one radiation-sensitive compound having at least one inhomogeneously dispersed absorption band in the UV and/or visible and/or IR spectral region. Under the action of narrow-band laser light 8 with at least one frequency lying within said absorption band and an externally adjustable electrostatic, magnetic or pressure field, the compound undergoes a change in absorption behaviour, such that, by adjustment to another field strength of the electrostatic, magnetic or pressure field, further changes in the absorption behaviour, can be produced and therefore additional items of information recorded. These changes, can be read off again on reproducing the field strengths at the time of recording. The items of information are recorded and read in the form of holograms. The change in the absorption behaviour is as a result of photophysical or photochemical hole burning.