BE403978A - - Google Patents

Info

Publication number
BE403978A
BE403978A BE403978DA BE403978A BE 403978 A BE403978 A BE 403978A BE 403978D A BE403978D A BE 403978DA BE 403978 A BE403978 A BE 403978A
Authority
BE
Belgium
Prior art keywords
wave
film
image
positive half
alternating current
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE403978A publication Critical patent/BE403978A/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
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2006Lamp housings characterised by the light source
    • G03B21/202Incandescent light sources
    • 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
    • G03B21/14Details
    • G03B21/20Lamp housings
    • G03B21/2053Intensity control of illuminating light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
BE403978D BE403978A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE403978A true BE403978A (enrdf_load_stackoverflow)

Family

ID=69451

Family Applications (1)

Application Number Title Priority Date Filing Date
BE403978D BE403978A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE403978A (enrdf_load_stackoverflow)

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