FR839173A - Photographic enlargement and reproduction apparatus - Google Patents

Photographic enlargement and reproduction apparatus

Info

Publication number
FR839173A
FR839173A FR839173DA FR839173A FR 839173 A FR839173 A FR 839173A FR 839173D A FR839173D A FR 839173DA FR 839173 A FR839173 A FR 839173A
Authority
FR
France
Prior art keywords
reproduction apparatus
photographic enlargement
enlargement
photographic
reproduction
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AG filed Critical Zeiss Ikon AG
Application granted granted Critical
Publication of FR839173A publication Critical patent/FR839173A/en
Expired 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR839173D 1937-07-30 1938-06-10 Photographic enlargement and reproduction apparatus Expired FR839173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE839173X 1937-07-30

Publications (1)

Publication Number Publication Date
FR839173A true FR839173A (en) 1939-03-28

Family

ID=6761861

Family Applications (1)

Application Number Title Priority Date Filing Date
FR839173D Expired FR839173A (en) 1937-07-30 1938-06-10 Photographic enlargement and reproduction apparatus

Country Status (1)

Country Link
FR (1) FR839173A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458437A (en) * 1945-04-20 1949-01-04 Eastman Kodak Co Photographic gamma control
US2501446A (en) * 1947-04-08 1950-03-21 Richard W Justice Light polarizing apparatus for analyzing pictures
US2700918A (en) * 1949-01-19 1955-02-01 American Optical Corp Microscope with variable means for increasing the visibility of optical images
US3049051A (en) * 1956-01-28 1962-08-14 Debrie Andre Victor Le Clement Arrangement with polarizing grating for the photographic establishment of filters with black and white networks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458437A (en) * 1945-04-20 1949-01-04 Eastman Kodak Co Photographic gamma control
US2501446A (en) * 1947-04-08 1950-03-21 Richard W Justice Light polarizing apparatus for analyzing pictures
US2700918A (en) * 1949-01-19 1955-02-01 American Optical Corp Microscope with variable means for increasing the visibility of optical images
US3049051A (en) * 1956-01-28 1962-08-14 Debrie Andre Victor Le Clement Arrangement with polarizing grating for the photographic establishment of filters with black and white networks

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