FR831476A - Improvements to cinematographic screens - Google Patents

Improvements to cinematographic screens

Info

Publication number
FR831476A
FR831476A FR831476DA FR831476A FR 831476 A FR831476 A FR 831476A FR 831476D A FR831476D A FR 831476DA FR 831476 A FR831476 A FR 831476A
Authority
FR
France
Prior art keywords
cinematographic
screens
cinematographic screens
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
Henry Nordheim Webster
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 FR831476A publication Critical patent/FR831476A/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
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G03B21/60—Projection screens characterised by the nature of the surface
    • G03B21/606—Projection screens characterised by the nature of the surface for relief projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR831476D 1936-12-31 1937-12-30 Improvements to cinematographic screens Expired FR831476A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB831476X 1936-12-31

Publications (1)

Publication Number Publication Date
FR831476A true FR831476A (en) 1938-09-05

Family

ID=10543494

Family Applications (1)

Application Number Title Priority Date Filing Date
FR831476D Expired FR831476A (en) 1936-12-31 1937-12-30 Improvements to cinematographic screens

Country Status (1)

Country Link
FR (1) FR831476A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753376C (en) * 1938-12-23 1953-02-09 Zeiss Ikon Ag Focusing screen, especially for photographic and cinematographic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753376C (en) * 1938-12-23 1953-02-09 Zeiss Ikon Ag Focusing screen, especially for photographic and cinematographic apparatus

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