GB558702A - Improvements relating to photographic cameras - Google Patents

Improvements relating to photographic cameras

Info

Publication number
GB558702A
GB558702A GB1469042A GB1469042A GB558702A GB 558702 A GB558702 A GB 558702A GB 1469042 A GB1469042 A GB 1469042A GB 1469042 A GB1469042 A GB 1469042A GB 558702 A GB558702 A GB 558702A
Authority
GB
United Kingdom
Prior art keywords
lens
image
screen
twin
viewing
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
GB1469042A
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.)
ArvinMeritor Light Vehicle Systems UK Ltd
Original Assignee
Wilmot Breeden 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 Wilmot Breeden Ltd filed Critical Wilmot Breeden Ltd
Priority to GB1469042A priority Critical patent/GB558702A/en
Publication of GB558702A publication Critical patent/GB558702A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/14—Viewfinders

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Viewfinders (AREA)
  • Telescopes (AREA)

Abstract

558,702. Twin-lens cameras. WILMOTBREEDEN, Ltd., and STEPHENSON, C. H. Oct. 20, 1942, No. 14690. [Classes 97 (i) and 98 (i)] A twin-lens camera, in which one lens projects an image on to the plate or film and the other on to a viewing-screen, the lens having a common focusing means, is provided with a binocular system for viewing the screen image. The Figure shows a suitable optical system in which light from the image on the translucent screen s produced by the lens l<SP>1</SP> is directed by a lens l<SP>2</SP> to eyepieces l<SP>3</SP>, l<SP>4</SP> by way of two similar series of totally-reflecting prisms p<SP>1</SP>, p<SP>3</SP>, p<SP>4</SP> and p<SP>2</SP>, p<SP>5</SP>, p<SP>6</SP>. The lens l<SP>1</SP> may be of shorter focal length than the taking objective, the common focusing means moving the two lenses at different rates.
GB1469042A 1942-10-20 1942-10-20 Improvements relating to photographic cameras Expired GB558702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1469042A GB558702A (en) 1942-10-20 1942-10-20 Improvements relating to photographic cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1469042A GB558702A (en) 1942-10-20 1942-10-20 Improvements relating to photographic cameras

Publications (1)

Publication Number Publication Date
GB558702A true GB558702A (en) 1944-01-17

Family

ID=10045822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1469042A Expired GB558702A (en) 1942-10-20 1942-10-20 Improvements relating to photographic cameras

Country Status (1)

Country Link
GB (1) GB558702A (en)

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