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Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
Publication date
Priority to DEZ19874DpriorityCriticalpatent/DE584693C/en
Application grantedgrantedCritical
Publication of DE584693CpublicationCriticalpatent/DE584693C/en
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
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Description
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (3)
Patentansprüche:Patent claims:ι . Lichttonbeleuchtungseinrichtung, mittels welcher ein Spaltbild auf dem Ton-
- aufzeichnungsträger innerhalb einer gegen . Nebenlicht vorgesehenen Blende entworfen
wird, dadurch gekennzeichnet, daß die Öffnung (1) der Nebenlichtblende in
Längsrichtung der Tonbahn abnehmende Breite hat.ι. Optical sound lighting device, by means of which a slit image on the sound
- recording media within a counter. Additional light provided aperture designed
is, characterized in that the opening (1) of the secondary light screen in
The longitudinal direction of the clay path has decreasing width.2. Einrichtung nach Anspruch 1, ge-• kennzeichnet durch eine nach einer Sinuskurve
verlaufende Breitenänderung.2. Device according to claim 1, • characterized by a sine curve
progressive change in width.3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die der Breitenänderung
entsprechende Lichtänderung mit einer unterhalb des Hörbereiches liegenden Frequenz erfolgt.3. Device according to claim 2, characterized in that the change in width
corresponding change in light takes place with a frequency lying below the audible range.