GB829692A - Improvements in or relating to optical projection apparatus - Google Patents

Improvements in or relating to optical projection apparatus

Info

Publication number
GB829692A
GB829692A GB3396456A GB3396456A GB829692A GB 829692 A GB829692 A GB 829692A GB 3396456 A GB3396456 A GB 3396456A GB 3396456 A GB3396456 A GB 3396456A GB 829692 A GB829692 A GB 829692A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
mirror
optical projection
relating
lens system
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
GB3396456A
Inventor
Arthur Ernest Smith
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.)
Ilford Imaging UK Ltd
Original Assignee
Ilford 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 Ilford Ltd filed Critical Ilford Ltd
Priority to GB3396456A priority Critical patent/GB829692A/en
Publication of GB829692A publication Critical patent/GB829692A/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
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/545—Lamp housings; Illuminating means for enlargers
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection-Type Copiers In General (AREA)
  • Projection Apparatus (AREA)

Abstract

829,692. Optical-projection apparatus. ILFORD Ltd. Oct. 28, 1957 [Nov. 7, 1956], No. 33964/56. Classes 97(1) and 98(1) An optical projection apparatus for use in the production of photographic enlargements comprises a light source, a condenser lens system, a projector lens and a mirror having a uniform diffusely reflecting surface such that light falling on to the mirror is reflected into the condenser lens system. As shown, light from a lamp 3 passes through a lens 4 on to a diffusely coated mirror 5 and thence through a condenser lens system 6, 7 into a projector lens (not shown).
GB3396456A 1956-11-07 1956-11-07 Improvements in or relating to optical projection apparatus Expired GB829692A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3396456A GB829692A (en) 1956-11-07 1956-11-07 Improvements in or relating to optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3396456A GB829692A (en) 1956-11-07 1956-11-07 Improvements in or relating to optical projection apparatus

Publications (1)

Publication Number Publication Date
GB829692A true GB829692A (en) 1960-03-02

Family

ID=10359653

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3396456A Expired GB829692A (en) 1956-11-07 1956-11-07 Improvements in or relating to optical projection apparatus

Country Status (1)

Country Link
GB (1) GB829692A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546639A1 (en) * 1983-05-28 1984-11-30 Leitz Ernst Gmbh LIGHT MIXING CHAMBER FOR A PHOTOGRAPHIC EXPANDER OR A PHOTOCOPIER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2546639A1 (en) * 1983-05-28 1984-11-30 Leitz Ernst Gmbh LIGHT MIXING CHAMBER FOR A PHOTOGRAPHIC EXPANDER OR A PHOTOCOPIER

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