FR791254A - Method and apparatus for compensating for variations in light in optical systems for recording, reproducing, etc., sound - Google Patents

Method and apparatus for compensating for variations in light in optical systems for recording, reproducing, etc., sound

Info

Publication number
FR791254A
FR791254A FR791254DA FR791254A FR 791254 A FR791254 A FR 791254A FR 791254D A FR791254D A FR 791254DA FR 791254 A FR791254 A FR 791254A
Authority
FR
France
Prior art keywords
reproducing
compensating
sound
recording
variations
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
Other languages
French (fr)
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR791254A publication Critical patent/FR791254A/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
FR791254D 1934-06-20 1935-06-13 Method and apparatus for compensating for variations in light in optical systems for recording, reproducing, etc., sound Expired FR791254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB791254X 1934-06-20

Publications (1)

Publication Number Publication Date
FR791254A true FR791254A (en) 1935-12-06

Family

ID=10504451

Family Applications (1)

Application Number Title Priority Date Filing Date
FR791254D Expired FR791254A (en) 1934-06-20 1935-06-13 Method and apparatus for compensating for variations in light in optical systems for recording, reproducing, etc., sound

Country Status (1)

Country Link
FR (1) FR791254A (en)

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