GB415177A - Improved equipment for the recording of sound on talking picture films - Google Patents

Improved equipment for the recording of sound on talking picture films

Info

Publication number
GB415177A
GB415177A GB847933A GB847933A GB415177A GB 415177 A GB415177 A GB 415177A GB 847933 A GB847933 A GB 847933A GB 847933 A GB847933 A GB 847933A GB 415177 A GB415177 A GB 415177A
Authority
GB
United Kingdom
Prior art keywords
lens
sound
film
image
light
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
Application number
GB847933A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB847933A priority Critical patent/GB415177A/en
Publication of GB415177A publication Critical patent/GB415177A/en
Expired legal-status Critical Current

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

  • Special Spraying Apparatus (AREA)

Abstract

415,177. Optical sound - recording apparatus. DALL, H. E., 186, Dunstable Road, Luton. March 21, 1933, No. 8479. [Class 40 (ii).] In optical sound-recording apparatus employing a sound-modulated glow lamp 4 the light is concentrated in a fine line on the film 5 by a very small cylindrical lens 7 having a focal length not greater than twelve times the width of the image produced on the film, the lens being mounted in a casing 3 which also holds in fixed or adjustable relation to the lens a diaphragm 2. This has formed in it a rectangular aperture which is narrower than the source of light and is directly illuminated by it. The interior of the casing 3 is preferably ridged and blackened to prevent internal reflection. The lens is held in a slotlike recess in a holder 8, Fig. 3, with its axis transverse to the film. Using a system in accordance with the invention, the ratio of the brilliance of the image to the linear spread of light due to aberrations of the lens is a practical maximum. A suitable focal length is about ten times the width of the image, which may be À001". In a modification, the rectangular aperture is formed between two spring strips, the position of which may be adjusted by means of a nut, co-operating with a scale.
GB847933A 1933-03-21 1933-03-21 Improved equipment for the recording of sound on talking picture films Expired GB415177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB847933A GB415177A (en) 1933-03-21 1933-03-21 Improved equipment for the recording of sound on talking picture films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB847933A GB415177A (en) 1933-03-21 1933-03-21 Improved equipment for the recording of sound on talking picture films

Publications (1)

Publication Number Publication Date
GB415177A true GB415177A (en) 1934-08-23

Family

ID=9853247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB847933A Expired GB415177A (en) 1933-03-21 1933-03-21 Improved equipment for the recording of sound on talking picture films

Country Status (1)

Country Link
GB (1) GB415177A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443004A (en) * 1946-03-22 1948-06-08 Curtis Helene Ind Inc Slit lens for sound reproduction apparatus
US4528654A (en) * 1979-10-01 1985-07-09 Bogey B.V. Dustproof case for an optical information tape including a clamping lens
US4581729A (en) * 1979-10-01 1986-04-08 Bogey B.V. Case containing optically readable carrier structure and apparatus for using same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443004A (en) * 1946-03-22 1948-06-08 Curtis Helene Ind Inc Slit lens for sound reproduction apparatus
US4528654A (en) * 1979-10-01 1985-07-09 Bogey B.V. Dustproof case for an optical information tape including a clamping lens
US4581729A (en) * 1979-10-01 1986-04-08 Bogey B.V. Case containing optically readable carrier structure and apparatus for using same

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