BE544137A - - Google Patents

Info

Publication number
BE544137A
BE544137A BE544137DA BE544137A BE 544137 A BE544137 A BE 544137A BE 544137D A BE544137D A BE 544137DA BE 544137 A BE544137 A BE 544137A
Authority
BE
Belgium
Prior art keywords
powder
small
less
screen
fine
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE544137A publication Critical patent/BE544137A/fr

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/54Accessories
    • G03B21/56Projection screens
    • G03B21/60Projection screens characterised by the nature of the surface
    • G03B21/606Projection screens characterised by the nature of the surface for relief projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Woven Fabrics (AREA)
BE544137D BE544137A (instruction)

Publications (1)

Publication Number Publication Date
BE544137A true BE544137A (instruction)

Family

ID=172200

Family Applications (1)

Application Number Title Priority Date Filing Date
BE544137D BE544137A (instruction)

Country Status (1)

Country Link
BE (1) BE544137A (instruction)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942869A (en) * 1974-07-12 1976-03-09 Magna Mir, Inc. Projection screen unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942869A (en) * 1974-07-12 1976-03-09 Magna Mir, Inc. Projection screen unit

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