FR740182A - écran transparent - Google Patents

écran transparent

Info

Publication number
FR740182A
FR740182A FR740182DA FR740182A FR 740182 A FR740182 A FR 740182A FR 740182D A FR740182D A FR 740182DA FR 740182 A FR740182 A FR 740182A
Authority
FR
France
Prior art keywords
transparent screen
transparent
screen
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
English (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.)
BROWN
BBC Brown Boveri AG Germany
Original Assignee
BROWN
Brown Boveri und Cie AG Germany
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 BROWN, Brown Boveri und Cie AG Germany filed Critical BROWN
Application granted granted Critical
Publication of FR740182A publication Critical patent/FR740182A/fr
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
    • G03B21/62—Translucent screens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR740182D 1931-07-24 1932-07-21 écran transparent Expired FR740182A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT740182X 1931-07-24

Publications (1)

Publication Number Publication Date
FR740182A true FR740182A (fr) 1933-01-23

Family

ID=3680250

Family Applications (1)

Application Number Title Priority Date Filing Date
FR740182D Expired FR740182A (fr) 1931-07-24 1932-07-21 écran transparent

Country Status (1)

Country Link
FR (1) FR740182A (fr)

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