GB372273A - Improvements in or relating to projection system and projection lens system therefor - Google Patents

Improvements in or relating to projection system and projection lens system therefor

Info

Publication number
GB372273A
GB372273A GB32598/30A GB3259830A GB372273A GB 372273 A GB372273 A GB 372273A GB 32598/30 A GB32598/30 A GB 32598/30A GB 3259830 A GB3259830 A GB 3259830A GB 372273 A GB372273 A GB 372273A
Authority
GB
United Kingdom
Prior art keywords
screen
projection
positive
lens system
positive component
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
GB32598/30A
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.)
TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Trans Lux Daylight Picture Screen Corp
Original Assignee
TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Trans Lux Daylight Picture Screen Corp
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 TRANS-LUX DAYLIGHT PICTURE SCREEN Corp, Trans Lux Daylight Picture Screen Corp filed Critical TRANS-LUX DAYLIGHT PICTURE SCREEN Corp
Publication of GB372273A publication Critical patent/GB372273A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Projection Apparatus (AREA)

Abstract

372,273. Optical-projection systems; lenses. TRANS-LUX DAYLIGHT PICTURE SCREEN CORPORATION, 247, Park Avenue, New York, U.S.A.-(Assignees of Bowen, L. W. ; Larchmont, New York, U.S.A.) Oct. 30, 1930, No. 32598. Convention date, Jan. 15. Void [Published under Sect. 91 of the Acts]. [Class 97 (i).] To enable projection apparatus, particularly for kinematograph films, to be placed relatively close to the screen, a projection lens system is provided consisting of positive and negative components arranged with the positive component nearer the gate aperture. The equivalent focal length of the system is approximately equal to the longest side of the picture aperture and to the aperture of the positive component of the system and the distance from the projector to the screen is approximately equal to the longest side of the picture on the screen. The separation between the positive and negative components of the system is greater than the focal length of the positive component In Fig. 7 the film 23 is illuminated by a source of light 20 and reflector 21 and the image is projected by the lens system 25 .. 28, of which the positive component, comprising the elements 25, 26, is nearer the film. Numerical data are given for the projection lens system shown in Fig. 8.
GB32598/30A 1930-01-15 1930-10-30 Improvements in or relating to projection system and projection lens system therefor Expired GB372273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US372273XA 1930-01-15 1930-01-15

Publications (1)

Publication Number Publication Date
GB372273A true GB372273A (en) 1932-05-05

Family

ID=21893161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32598/30A Expired GB372273A (en) 1930-01-15 1930-10-30 Improvements in or relating to projection system and projection lens system therefor

Country Status (1)

Country Link
GB (1) GB372273A (en)

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