FR2233641B3 - - Google Patents

Info

Publication number
FR2233641B3
FR2233641B3 FR7321495A FR7321495A FR2233641B3 FR 2233641 B3 FR2233641 B3 FR 2233641B3 FR 7321495 A FR7321495 A FR 7321495A FR 7321495 A FR7321495 A FR 7321495A FR 2233641 B3 FR2233641 B3 FR 2233641B3
Authority
FR
France
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
FR7321495A
Other languages
French (fr)
Other versions
FR2233641A1 (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.)
G D R
Original Assignee
G D R
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 G D R filed Critical G D R
Priority to FR7321495A priority Critical patent/FR2233641A1/en
Publication of FR2233641A1 publication Critical patent/FR2233641A1/en
Application granted granted Critical
Publication of FR2233641B3 publication Critical patent/FR2233641B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
FR7321495A 1973-06-13 1973-06-13 Optical decoder for messages - comprises array of prisms with total internal reflection Granted FR2233641A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7321495A FR2233641A1 (en) 1973-06-13 1973-06-13 Optical decoder for messages - comprises array of prisms with total internal reflection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7321495A FR2233641A1 (en) 1973-06-13 1973-06-13 Optical decoder for messages - comprises array of prisms with total internal reflection

Publications (2)

Publication Number Publication Date
FR2233641A1 FR2233641A1 (en) 1975-01-10
FR2233641B3 true FR2233641B3 (en) 1976-06-04

Family

ID=9120891

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7321495A Granted FR2233641A1 (en) 1973-06-13 1973-06-13 Optical decoder for messages - comprises array of prisms with total internal reflection

Country Status (1)

Country Link
FR (1) FR2233641A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2053882A1 (en) * 1989-04-25 1990-10-26 Brian Robert Alfred Wybrow Viewing aid

Also Published As

Publication number Publication date
FR2233641A1 (en) 1975-01-10

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Legal Events

Date Code Title Description
ST Notification of lapse