AT91162B - Device for reproducing photographically recorded sounds by optical-electrical means. - Google Patents
Device for reproducing photographically recorded sounds by optical-electrical means.Info
- Publication number
- AT91162B AT91162B AT91162DA AT91162B AT 91162 B AT91162 B AT 91162B AT 91162D A AT91162D A AT 91162DA AT 91162 B AT91162 B AT 91162B
- Authority
- AT
- Austria
- Prior art keywords
- reproducing
- optical
- electrical means
- recorded sounds
- photographically recorded
- Prior art date
Links
Landscapes
- Luminescent Compositions (AREA)
- Radiation-Therapy Devices (AREA)
Description
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Vorrichtung zur Wiedergabe photographisch aufgenommener Laute auf optisch- elektrischem Wege.
EMI1.1
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wird, d & sie entweder am Photophonogrammträger oder im lichtelektrischen Organ nur eine unnötige Belastung darstellt, die eventuell die technische Lösung des Problems der Wiedergabe von Schallschwingungen unmöglich machen kann. Aus diesem Grunde und ebenso wegen der bekannten spektralen Selektivität der lichtempfindlichen Organe ist es ganz allgemein vorteilhaft, Lichtquellen zu verwenden, deren emittierte Strahlung selektiven Charakter hat. Strahler, die ein kontinuierliches Emissionsspektrum besitzen, wie erhitzte feste Körper (Metalldrähte, Nel1lstkörper. glühende Kohleelektroden des Lichtbogens) sind deshalb weniger geeignet.
Selektiv strahlende Lichtquellen sind beispielsweise Metalldämpfe, die durch elektrische Entladung hoher Stromdichte zum Leuchten gebracht werden, wie, die für andere Verwendungszwecke in der Technik bekannten Quecksilber-, Kadmium-. Zinklampen und ähnliche. Einer Kadmiumdampflampe würde beispielsweise als lichtelektrisehes Organ maximaler Empfindlichkeit eine Rubidiumzelle entsprechen.
PATENT-ANSPRÜCHE :
1. Vorrichtung zur Wiedergabe photographisch aufgenommener Laute auf optisch-elektrischem Wege, gekennzeichnet durch eine Lichtquelle, deren emittierte Strahlung den Absorptionseigenschaften des Photophonogrammträgers derart angepasst ist, dass die Strahlungsschwankungen und damit die Amplituden des Wellenstromes maximal zur Wirkung kommen.
<Desc / Clms Page number 1>
Device for reproducing photographically recorded sounds by optical-electrical means.
EMI1.1
<Desc / Clms Page number 2>
that it only represents an unnecessary burden either on the photophonogram carrier or in the photoelectric organ, which may make the technical solution of the problem of reproducing sound vibrations impossible. For this reason, and also because of the known spectral selectivity of the light-sensitive organs, it is generally advantageous to use light sources whose emitted radiation has a selective character. Radiators that have a continuous emission spectrum, such as heated solid bodies (metal wires, fleecy bodies, glowing carbon electrodes of the electric arc) are therefore less suitable.
Selectively radiating light sources are, for example, metal vapors which are made to glow by electrical discharge of high current density, such as the mercury and cadmium which are known in the art for other uses. Zinc lamps and the like. A cadmium vapor lamp, for example, would correspond to a rubidium cell as a light-electrical organ of maximum sensitivity.
PATENT CLAIMS:
1. Apparatus for reproducing photographically recorded sounds by optical-electrical means, characterized by a light source, the emitted radiation of which is adapted to the absorption properties of the photophonogram carrier in such a way that the radiation fluctuations and thus the amplitudes of the wave current are maximally effective.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT91162T | 1921-04-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT91162B true AT91162B (en) | 1923-02-10 |
Family
ID=3611315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT91162D AT91162B (en) | 1921-04-13 | 1921-04-13 | Device for reproducing photographically recorded sounds by optical-electrical means. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT91162B (en) |
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1921
- 1921-04-13 AT AT91162D patent/AT91162B/en active
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