AT309849B - Kelchförmiger Reflektor, insbesondere für Bildprojektoren - Google Patents

Kelchförmiger Reflektor, insbesondere für Bildprojektoren

Info

Publication number
AT309849B
AT309849B AT1134570A AT1134570A AT309849B AT 309849 B AT309849 B AT 309849B AT 1134570 A AT1134570 A AT 1134570A AT 1134570 A AT1134570 A AT 1134570A AT 309849 B AT309849 B AT 309849B
Authority
AT
Austria
Prior art keywords
cup
shaped reflector
image projectors
projectors
image
Prior art date
Application number
AT1134570A
Other languages
English (en)
Original Assignee
Thorn Lighting Ltd
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 Thorn Lighting Ltd filed Critical Thorn Lighting Ltd
Application granted granted Critical
Publication of AT309849B publication Critical patent/AT309849B/de

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
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light
    • 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
    • G03B21/001—Slide projectors
    • 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
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Optical Elements Other Than Lenses (AREA)
AT1134570A 1969-12-17 1970-12-17 Kelchförmiger Reflektor, insbesondere für Bildprojektoren AT309849B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB61558/69A GB1278690A (en) 1969-12-17 1969-12-17 Improvements relating to screen projectors

Publications (1)

Publication Number Publication Date
AT309849B true AT309849B (de) 1973-09-10

Family

ID=10487170

Family Applications (1)

Application Number Title Priority Date Filing Date
AT1134570A AT309849B (de) 1969-12-17 1970-12-17 Kelchförmiger Reflektor, insbesondere für Bildprojektoren

Country Status (7)

Country Link
US (1) US3768900A (de)
AT (1) AT309849B (de)
DE (1) DE2061763A1 (de)
FR (1) FR2073913A5 (de)
GB (1) GB1278690A (de)
SE (1) SE365622B (de)
ZA (1) ZA708500B (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3884570A (en) * 1972-01-03 1975-05-20 Personal Communications Inc Reader for reflective background microrecords
US3979160A (en) * 1975-03-03 1976-09-07 Minnesota Mining And Manufacturing Company Compact overhead projector
US4389701A (en) * 1980-10-27 1983-06-21 Optimetrix Corporation Illumination system
DE3228575A1 (de) * 1982-07-30 1984-02-02 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Baueinheit, bestehend aus ellipsoidreflektor und halogengluehlampe
JPS60184250A (ja) * 1984-03-01 1985-09-19 フュージョン・システムズ・コーポレーション セグメント化された反射器を有するランプ
US4739456A (en) * 1986-12-12 1988-04-19 Little William D High intensity pattern/follow spot projector
US4958909A (en) * 1989-11-30 1990-09-25 Yamashita Denso Corporation Method of adjusting light source position in convergence device employing spheroidal mirror
US5272408A (en) * 1991-05-09 1993-12-21 Gte Products Corporation Lamp and reflector assembly
US5179413A (en) * 1992-02-05 1993-01-12 Eastman Kodak Company System for illuminating a linear zone which reduces the effect of light retroflected from outside the zone on the illumination
JPH07306395A (ja) * 1994-05-10 1995-11-21 Nikon Corp 投射装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US17038A (en) * 1857-04-14 Expansive bit
US1248456A (en) * 1916-09-06 1917-12-04 Paul L Clark Projection-machine illumination.
US1502453A (en) * 1921-05-11 1924-07-22 William H Wood Headlight
US3381575A (en) * 1965-12-03 1968-05-07 Sylvania Electric Prod Electric projection lamp

Also Published As

Publication number Publication date
ZA708500B (en) 1971-09-29
DE2061763A1 (de) 1971-06-24
GB1278690A (en) 1972-06-21
FR2073913A5 (de) 1971-10-01
SE365622B (de) 1974-03-25
US3768900A (en) 1973-10-30

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee