GB417741A - Apparatus for optical sound recording and reproducing - Google Patents
Apparatus for optical sound recording and reproducingInfo
- Publication number
- GB417741A GB417741A GB32762/33A GB3276233A GB417741A GB 417741 A GB417741 A GB 417741A GB 32762/33 A GB32762/33 A GB 32762/33A GB 3276233 A GB3276233 A GB 3276233A GB 417741 A GB417741 A GB 417741A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- recording
- sound
- reproducing
- image
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- 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
Abstract
417,741. Optical sound recording and reproducing apparatus. SELENOPHON LICHTUND TONBILDGES., 25, Neubaugasse, Vienna. Nov. 23, 1933, No. 32762. Convention date, Nov. 26, 1932. [Class 40 (ii).] Apparatus for recording sound on an opaque carrier, and for reproducing the sound by means of reflected light, is characterized by the provision of two optical systems, so arranged with their axes in one plane that the same apparatus may be used either for recording or for reproducing. One of the optical systems may also be used for monitoring during recording. As shown, light from a source L is condensed by lenses K, and passes through a slot B, an image of which is focused by a lens system A on a vibratory strip K<1> forming part of a light valve. A lens system C projects an image of the edge of the illuminated member K<1> on a point P on an opaque strip T of paper or the like, so that the sound is there recorded. A second optical system D focuses light reflected from the record strip, on to a photoelectric cell Z, whereby reproduction from a previously made record may be effected with the same apparatus, the member K<1> in this case being stationary. The optical system D may be used for inspecting the image at the point P during recording, by reflecting a part of the beam through a prism Q on to a frosted screen N, whilst the cell Z may at the same time provide a means for monitoring acoustically. The record strip is driven by a roller R of large diameter, which moves the strip by friction due to adhesion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT417741X | 1932-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB417741A true GB417741A (en) | 1934-10-11 |
Family
ID=3673882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32762/33A Expired GB417741A (en) | 1932-11-26 | 1933-11-23 | Apparatus for optical sound recording and reproducing |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB417741A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE938154C (en) * | 1952-11-09 | 1956-01-26 | Siemens Ag | Optical sound recording optics with listening light path |
| DE938153C (en) * | 1952-10-26 | 1956-01-26 | Siemens Ag | Optical sound film optics with observation device for film and slit image |
| US4521876A (en) * | 1979-10-18 | 1985-06-04 | Victor Company Of Japan, Limited | Focusing state monitoring apparatus in optical recording apparatus |
-
1933
- 1933-11-23 GB GB32762/33A patent/GB417741A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE938153C (en) * | 1952-10-26 | 1956-01-26 | Siemens Ag | Optical sound film optics with observation device for film and slit image |
| DE938154C (en) * | 1952-11-09 | 1956-01-26 | Siemens Ag | Optical sound recording optics with listening light path |
| US4521876A (en) * | 1979-10-18 | 1985-06-04 | Victor Company Of Japan, Limited | Focusing state monitoring apparatus in optical recording apparatus |
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