FR638280A - Moyens d'obtenir des faisceaux lumineux étroits - Google Patents

Moyens d'obtenir des faisceaux lumineux étroits

Info

Publication number
FR638280A
FR638280A FR638280DA FR638280A FR 638280 A FR638280 A FR 638280A FR 638280D A FR638280D A FR 638280DA FR 638280 A FR638280 A FR 638280A
Authority
FR
France
Prior art keywords
ways
light beams
narrow light
narrow
beams
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
English (en)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR638280A publication Critical patent/FR638280A/fr
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
FR638280D 1926-07-06 1927-07-04 Moyens d'obtenir des faisceaux lumineux étroits Expired FR638280A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US638280XA 1926-07-06 1926-07-06

Publications (1)

Publication Number Publication Date
FR638280A true FR638280A (fr) 1928-05-21

Family

ID=22051784

Family Applications (1)

Application Number Title Priority Date Filing Date
FR638280D Expired FR638280A (fr) 1926-07-06 1927-07-04 Moyens d'obtenir des faisceaux lumineux étroits

Country Status (1)

Country Link
FR (1) FR638280A (fr)

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