GB470120A - Improvements in and relating to optical projection apparatus - Google Patents

Improvements in and relating to optical projection apparatus

Info

Publication number
GB470120A
GB470120A GB1080336A GB1080336A GB470120A GB 470120 A GB470120 A GB 470120A GB 1080336 A GB1080336 A GB 1080336A GB 1080336 A GB1080336 A GB 1080336A GB 470120 A GB470120 A GB 470120A
Authority
GB
United Kingdom
Prior art keywords
condenser
projected
light
mirror
projection apparatus
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
GB1080336A
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.)
CUSSONS Ltd G
Original Assignee
CUSSONS Ltd G
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 CUSSONS Ltd G filed Critical CUSSONS Ltd G
Priority to GB1080336A priority Critical patent/GB470120A/en
Publication of GB470120A publication Critical patent/GB470120A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/10Projectors with built-in or built-on screen

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)

Abstract

470,120. Optical projection apparatus. CUSSONS, Ltd., G., and CUSSONS, G. W. April 15, 1936, No. 10803. [Class 97 (i)] An optical projection apparatus wherein the surface of the object, the image of which is to be projected, is illuminated by light projected on to and focused upon it, comprises a source of light, and a compound lens or condenser in which a central portion is made ineffective by placing thereon or therein another lens or lenses through which the image of the illuminated surface of the object is projected in a direction opposite to the illuminating rays, images being projected or reflected by any known means on to a screen. In Fig. 1, light from the source 5 passes through the condenser 6 and water or other cooling means 7 and is reflected from the mirror 8 through the condenser 9 on to the object on the transparent table 15, adjustable in height to focus the light on the object. The projection system 11 is carried in a tube in a hole in the centre of the condenser 9 and the projected rays pass through a tube in the centre of the mirror 8 on to a screen 13. A prism may be interposed to reflect the rays horizontally through holes in the mirror 8 and in the end wall of the casing. Alternatively the prism 22 and the projection lens 11 may both be mounted on the condenser 9, Fig. 4.
GB1080336A 1936-04-15 1936-04-15 Improvements in and relating to optical projection apparatus Expired GB470120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1080336A GB470120A (en) 1936-04-15 1936-04-15 Improvements in and relating to optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1080336A GB470120A (en) 1936-04-15 1936-04-15 Improvements in and relating to optical projection apparatus

Publications (1)

Publication Number Publication Date
GB470120A true GB470120A (en) 1937-08-10

Family

ID=9974557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1080336A Expired GB470120A (en) 1936-04-15 1936-04-15 Improvements in and relating to optical projection apparatus

Country Status (1)

Country Link
GB (1) GB470120A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445929A (en) * 1947-04-07 1948-07-27 Sturgess Wayne Projector slide viewer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445929A (en) * 1947-04-07 1948-07-27 Sturgess Wayne Projector slide viewer

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