GB925375A - Improvements in or relating to means for focusing the objective lens of a slide projector - Google Patents

Improvements in or relating to means for focusing the objective lens of a slide projector

Info

Publication number
GB925375A
GB925375A GB4155360A GB4155360A GB925375A GB 925375 A GB925375 A GB 925375A GB 4155360 A GB4155360 A GB 4155360A GB 4155360 A GB4155360 A GB 4155360A GB 925375 A GB925375 A GB 925375A
Authority
GB
United Kingdom
Prior art keywords
slide
pin
objective lens
focusing
relating
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB4155360A
Inventor
Herbert Hauptvogel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kamera und Kinowerke Dresden VEB
Original Assignee
Kamera und Kinowerke Dresden VEB
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 Kamera und Kinowerke Dresden VEB filed Critical Kamera und Kinowerke Dresden VEB
Priority to GB4155360A priority Critical patent/GB925375A/en
Publication of GB925375A publication Critical patent/GB925375A/en
Expired legal-status Critical Current

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
    • G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lenses (AREA)
  • Projection Apparatus (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)

Abstract

925,375. Slide projectors; focusing devices. KAMERA-UND KINOWERKE DRESDEN VEB. Dec. 2, 1960, No. 41553/60. Classes 97 (1) and 98 (2). To maintain the projection lens of a slide projector at a predetermined distance from the plane of the slide and thus ensure correct focus, the objective lens tube 9 carries a pin 10 and is urged by springs 11, 12 to cause pin 10 to bear against a transparency mounted in a slide frame 4, 5 (Figs. 2 and 3) provided with a bevelled aperture 6 (or 7) for the passage of pin 10 when the slide is in the projection position. If conventional non-apertured slides are used, the pin 10 may be held clear by catch 13 pressing against the lens tube and the objective may be focused by hand.
GB4155360A 1960-12-02 1960-12-02 Improvements in or relating to means for focusing the objective lens of a slide projector Expired GB925375A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4155360A GB925375A (en) 1960-12-02 1960-12-02 Improvements in or relating to means for focusing the objective lens of a slide projector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4155360A GB925375A (en) 1960-12-02 1960-12-02 Improvements in or relating to means for focusing the objective lens of a slide projector

Publications (1)

Publication Number Publication Date
GB925375A true GB925375A (en) 1963-05-08

Family

ID=10420231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4155360A Expired GB925375A (en) 1960-12-02 1960-12-02 Improvements in or relating to means for focusing the objective lens of a slide projector

Country Status (1)

Country Link
GB (1) GB925375A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142630A1 (en) * 1980-11-06 1982-05-19 Naamloze Vennootschap Philips' Gloeilampenfabrieken, 5621 Eindhoven OPTICAL SYSTEM FOR GENERATING A COLLIMATED BUNCH OF LIGHT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3142630A1 (en) * 1980-11-06 1982-05-19 Naamloze Vennootschap Philips' Gloeilampenfabrieken, 5621 Eindhoven OPTICAL SYSTEM FOR GENERATING A COLLIMATED BUNCH OF LIGHT

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