BE494662A - - Google Patents

Info

Publication number
BE494662A
BE494662A BE494662DA BE494662A BE 494662 A BE494662 A BE 494662A BE 494662D A BE494662D A BE 494662DA BE 494662 A BE494662 A BE 494662A
Authority
BE
Belgium
Prior art keywords
air
channel
lamps
light
image
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE494662A publication Critical patent/BE494662A/fr

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
    • G03B21/06—Projectors or projection-type viewers; Accessories therefor affording only episcopic projection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
BE494662D BE494662A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE494662A true BE494662A (enrdf_load_stackoverflow)

Family

ID=138357

Family Applications (1)

Application Number Title Priority Date Filing Date
BE494662D BE494662A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE494662A (enrdf_load_stackoverflow)

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