FR538350A - Optical device for reflecting still or moving photographic images - Google Patents

Optical device for reflecting still or moving photographic images

Info

Publication number
FR538350A
FR538350A FR538350DA FR538350A FR 538350 A FR538350 A FR 538350A FR 538350D A FR538350D A FR 538350DA FR 538350 A FR538350 A FR 538350A
Authority
FR
France
Prior art keywords
optical device
photographic images
moving photographic
reflecting still
reflecting
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
Charles Van Soolen
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 FR538350A publication Critical patent/FR538350A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • 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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR538350D 1921-07-18 1921-07-18 Optical device for reflecting still or moving photographic images Expired FR538350A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR538350T 1921-07-18

Publications (1)

Publication Number Publication Date
FR538350A true FR538350A (en) 1922-06-08

Family

ID=8928138

Family Applications (1)

Application Number Title Priority Date Filing Date
FR538350D Expired FR538350A (en) 1921-07-18 1921-07-18 Optical device for reflecting still or moving photographic images

Country Status (1)

Country Link
FR (1) FR538350A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180207A (en) * 1961-08-03 1965-04-27 Graflex Inc Viewing device for microfilm strip
US4379628A (en) * 1981-08-10 1983-04-12 Realist, Inc. Folding transparency (microfiche) viewer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180207A (en) * 1961-08-03 1965-04-27 Graflex Inc Viewing device for microfilm strip
US4379628A (en) * 1981-08-10 1983-04-12 Realist, Inc. Folding transparency (microfiche) viewer

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