GB394959A - Process for reproducing sound films - Google Patents
Process for reproducing sound filmsInfo
- Publication number
- GB394959A GB394959A GB27466/31A GB2746631A GB394959A GB 394959 A GB394959 A GB 394959A GB 27466/31 A GB27466/31 A GB 27466/31A GB 2746631 A GB2746631 A GB 2746631A GB 394959 A GB394959 A GB 394959A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- record
- sound
- oct
- wedges
- 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
Landscapes
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
394,959. Reproducing photographic sound-records. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Oct. 2, 1931, No. 27466. Convention date, Oct. 31, 1930. Void [Published under Sect. 91 of the Acts]. [Class 40 (ii).] Gamma value errors in photographic soundrecords are wholly or partially compensated for in the reproduction of sound from the film by adapting the spectral composition of the reproductive light to the spectral absorption of the record and to the sensitivity of the light sensitive member. For this purpose colour filters, colour wedges or the like combined or coupled with neutral grey filters, wedges or other light obscuring devices such as diaphragms are interposed in front of the light so that the effective action of the light falling on the selected light sensitive member will effect the desired compensation. Alternatively the light source may be varied by varying the incandescence of the lamp filament. The gamma value may be partially compensated for in preparing the record by dyeing the positive record film, for example by tinting with uranium or copper, and printing it with light of suitable wave length, for example blue light ; in addition the negative record may be dyed. Such preliminary treatment may include colouring the silver sound record by a known toning or intensifying process, or may be effected in the pinatype process.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE394959X | 1930-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB394959A true GB394959A (en) | 1933-07-06 |
Family
ID=6396770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27466/31A Expired GB394959A (en) | 1930-10-31 | 1931-10-02 | Process for reproducing sound films |
Country Status (2)
| Country | Link |
|---|---|
| AT (1) | AT134708B (en) |
| GB (1) | GB394959A (en) |
-
1931
- 1931-09-23 AT AT134708D patent/AT134708B/en active
- 1931-10-02 GB GB27466/31A patent/GB394959A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT134708B (en) | 1933-09-25 |
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