GB741127A - Improvements in and relating to optical light-projecting systems particularly for diascopic projection - Google Patents

Improvements in and relating to optical light-projecting systems particularly for diascopic projection

Info

Publication number
GB741127A
GB741127A GB2977551A GB2977551A GB741127A GB 741127 A GB741127 A GB 741127A GB 2977551 A GB2977551 A GB 2977551A GB 2977551 A GB2977551 A GB 2977551A GB 741127 A GB741127 A GB 741127A
Authority
GB
United Kingdom
Prior art keywords
lamp
lens
dec
class
light
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
GB2977551A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2977551A priority Critical patent/GB741127A/en
Publication of GB741127A publication Critical patent/GB741127A/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
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2026—Gas discharge type light sources, e.g. arcs
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

741,127. Optical systems. MARTIN H. Dec. 19, 1952 [Dec. 19, 1951]. No. 29775/51. Class 97 (1). An illuminating system for diascopic optical projection or for spot-lighting comprises a lamp 5, with a condenser system for producing a beam converging towards a point 3 near a lens 7 which images on to the object 10 a selected cross-section 8 of the converging beam, e.g. where it is uniform, a further condenser 9 concentrating the light transmitted by the object into a projection objective 11. In the form shown the lamp is disposed with its filament at the centre of a spherical reflector 6 and at the rear focus of one or more truncated ellipsoidal reflectors 1 surrounding a prismatic lens 4. When the system is used for spotlighting the object 10 is a mask shaped with the contour of the area to be lighted. A correcting member may be introduced if the light source is elongated and the shape of the object 10 is not, or vice versa. For this purpose a negative or positive cylindrical lens may be introduced between the lenses 7 and 9 or an inclined cylindrical mirror may reflect the beam through approximately 90 degrees. Where the source of light is a mercury arc an auxiliary lamp may be inserted in the system near the point 3 to project back to the main lamp to heat it and assist starting. This lamp may have a condensing system like the main lamp and the lens 7 may be movable to accommodate it. Specifications 327,129, (Class 97 (i)), 360,910, [Group XI], 567,154 and 573,700 are referred to.
GB2977551A 1951-12-19 1951-12-19 Improvements in and relating to optical light-projecting systems particularly for diascopic projection Expired GB741127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2977551A GB741127A (en) 1951-12-19 1951-12-19 Improvements in and relating to optical light-projecting systems particularly for diascopic projection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2977551A GB741127A (en) 1951-12-19 1951-12-19 Improvements in and relating to optical light-projecting systems particularly for diascopic projection

Publications (1)

Publication Number Publication Date
GB741127A true GB741127A (en) 1955-11-30

Family

ID=10296984

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2977551A Expired GB741127A (en) 1951-12-19 1951-12-19 Improvements in and relating to optical light-projecting systems particularly for diascopic projection

Country Status (1)

Country Link
GB (1) GB741127A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154290B (en) * 1956-05-11 1963-09-12 Freiberger Praez Smechanik Veb Honeycomb condenser system for film projectors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154290B (en) * 1956-05-11 1963-09-12 Freiberger Praez Smechanik Veb Honeycomb condenser system for film projectors

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