GB228704A - Improvements in condensers for optical projecting apparatus - Google Patents

Improvements in condensers for optical projecting apparatus

Info

Publication number
GB228704A
GB228704A GB292324A GB292324A GB228704A GB 228704 A GB228704 A GB 228704A GB 292324 A GB292324 A GB 292324A GB 292324 A GB292324 A GB 292324A GB 228704 A GB228704 A GB 228704A
Authority
GB
United Kingdom
Prior art keywords
lenses
lens
condensers
projecting apparatus
illuminant
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
GB292324A
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.)
WILLIAM ISAAC SKENNERTON
Original Assignee
WILLIAM ISAAC SKENNERTON
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 WILLIAM ISAAC SKENNERTON filed Critical WILLIAM ISAAC SKENNERTON
Priority to GB292324A priority Critical patent/GB228704A/en
Publication of GB228704A publication Critical patent/GB228704A/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
    • G03B21/208—Homogenising, shaping of the illumination light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lens Barrels (AREA)

Abstract

228,704. Skennerton, W. I. Feb. 4, 1924, Lenses; optical-projection-apparatus.-Multiple lens condensers consist of two double convex lenses 2, 3, between which is situated a third lens 5 which is a converging meniscus or a planoconvex lens. The lenses are separated by rings 6 to act as distance-pieces, the rings in contact with the lenses nearer the illuminant being filled with asbestos. The meniscus lens is preferably placed nearer to the double convex lens which faces the illuminant. Flats are out on the sides of the lenses to facilitate ventilation.
GB292324A 1924-02-04 1924-02-04 Improvements in condensers for optical projecting apparatus Expired GB228704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB292324A GB228704A (en) 1924-02-04 1924-02-04 Improvements in condensers for optical projecting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB292324A GB228704A (en) 1924-02-04 1924-02-04 Improvements in condensers for optical projecting apparatus

Publications (1)

Publication Number Publication Date
GB228704A true GB228704A (en) 1925-02-12

Family

ID=9748603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB292324A Expired GB228704A (en) 1924-02-04 1924-02-04 Improvements in condensers for optical projecting apparatus

Country Status (1)

Country Link
GB (1) GB228704A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600975A (en) * 1951-02-10 1952-06-17 American Optical Corp Unitary condenser lens assembly mounting means for projectors
US2905054A (en) * 1954-07-07 1959-09-22 Sandy B Logan Reading glass and mounting
US4796756A (en) * 1988-04-11 1989-01-10 Silor Optical Of Florida, Inc. Optical lens carrier

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600975A (en) * 1951-02-10 1952-06-17 American Optical Corp Unitary condenser lens assembly mounting means for projectors
US2905054A (en) * 1954-07-07 1959-09-22 Sandy B Logan Reading glass and mounting
US4796756A (en) * 1988-04-11 1989-01-10 Silor Optical Of Florida, Inc. Optical lens carrier

Similar Documents

Publication Publication Date Title
GB228704A (en) Improvements in condensers for optical projecting apparatus
SU47819A1 (en) The method of obtaining plastic from waste rubber Ascle-PIAS
SU46042A1 (en) The method of manufacturing plastics
SU31409A1 (en) Method for producing coal coke
SU39083A1 (en) Furnace for burning flotation tailings
SU39976A1 (en) The method of obtaining siliceous bronze
SU39523A1 (en) Fork
SU47277A1 (en) The method of obtaining metallurgical claim or resin coke
SU33535A1 (en) The method of producing tetrabromethane
SU37703A1 (en) The method of producing tannate iron
SU41371A1 (en) Grinding mandrel
SU36300A1 (en) Burdo for the loom
SU40026A1 (en) The method of determining the wear surface of the product
SU35580A1 (en) Aerodynamic tube
SU47813A1 (en) The method of regeneration of rubber
SU37328A1 (en) The method of manufacture of rubber compounds
SU49224A1 (en) The method of obtaining artificial resin
SU25729A1 (en) Method of making felt
SU41332A1 (en) The method of obtaining paper increased strength
SU38318A1 (en) The method of regeneration of waste galalita
SU50725A1 (en) The method of rubber regeneration
SU39102A1 (en) The method of producing tetra-methyl-thi-ramidisulfide
SU51152A1 (en) The method of producing bourbonal
SU31531A1 (en) The method of preparation of thin sections for microscopic studies
SU31434A1 (en) The method of obtaining furfural