FR731359A - Magnification device - Google Patents

Magnification device

Info

Publication number
FR731359A
FR731359A FR731359DA FR731359A FR 731359 A FR731359 A FR 731359A FR 731359D A FR731359D A FR 731359DA FR 731359 A FR731359 A FR 731359A
Authority
FR
France
Prior art keywords
magnification device
magnification
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)
Inventor
Hermann Wisper
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 filed Critical
Application granted granted Critical
Publication of FR731359A publication Critical patent/FR731359A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR731359D 1932-02-13 1932-02-13 Magnification device Expired FR731359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731359T 1932-02-13

Publications (1)

Publication Number Publication Date
FR731359A true FR731359A (en) 1932-09-02

Family

ID=9117972

Family Applications (1)

Application Number Title Priority Date Filing Date
FR731359D Expired FR731359A (en) 1932-02-13 1932-02-13 Magnification device

Country Status (1)

Country Link
FR (1) FR731359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468935A (en) * 1945-01-25 1949-05-03 Marful Specialties Inc Photographic apparatus for reproduction by direct or reflected light beams
FR2561406A1 (en) * 1984-03-13 1985-09-20 Chebbah Akli Back-projection system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468935A (en) * 1945-01-25 1949-05-03 Marful Specialties Inc Photographic apparatus for reproduction by direct or reflected light beams
FR2561406A1 (en) * 1984-03-13 1985-09-20 Chebbah Akli Back-projection system

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