BE502425A - - Google Patents

Info

Publication number
BE502425A
BE502425A BE502425DA BE502425A BE 502425 A BE502425 A BE 502425A BE 502425D A BE502425D A BE 502425DA BE 502425 A BE502425 A BE 502425A
Authority
BE
Belgium
Prior art keywords
screen
less
pan
optical
mass
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE502425A publication Critical patent/BE502425A/fr

Links

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)
  • Overhead Projectors And Projection Screens (AREA)
BE502425D BE502425A (enrdf_load_html_response)

Publications (1)

Publication Number Publication Date
BE502425A true BE502425A (enrdf_load_html_response)

Family

ID=143957

Family Applications (1)

Application Number Title Priority Date Filing Date
BE502425D BE502425A (enrdf_load_html_response)

Country Status (1)

Country Link
BE (1) BE502425A (enrdf_load_html_response)

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