GB517498A - An improved view finder optical system, particularly for use with photographic cameras - Google Patents

An improved view finder optical system, particularly for use with photographic cameras

Info

Publication number
GB517498A
GB517498A GB29094/38A GB2909438A GB517498A GB 517498 A GB517498 A GB 517498A GB 29094/38 A GB29094/38 A GB 29094/38A GB 2909438 A GB2909438 A GB 2909438A GB 517498 A GB517498 A GB 517498A
Authority
GB
United Kingdom
Prior art keywords
optical system
view finder
finder optical
photographic cameras
improved view
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
GB29094/38A
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Publication of GB517498A publication Critical patent/GB517498A/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)

Abstract

517,498. View-finders. KODAK, Ltd. Oct. 7, 1938, No. 29094. Convention date, Oct. 8, 1937. [Class 97 (i)] A view-finder system comprises a collective eyepiece, 1 and a negative objective 2 having at least one surface made aspherical to give an image free from distortion. The condition to be fulfilled is that for a particular position of the eye. Tan v/Tan u = Constant, v and u being the inclinations to the axis of a ray before and after passage through the objective. Data are given of curvatures to satisfy this condition. Specification 457,138 is referred to.
GB29094/38A 1937-10-08 1938-10-07 An improved view finder optical system, particularly for use with photographic cameras Expired GB517498A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517498XA 1937-10-08 1937-10-08

Publications (1)

Publication Number Publication Date
GB517498A true GB517498A (en) 1940-01-31

Family

ID=21973162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29094/38A Expired GB517498A (en) 1937-10-08 1938-10-07 An improved view finder optical system, particularly for use with photographic cameras

Country Status (1)

Country Link
GB (1) GB517498A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207419A3 (en) * 2000-11-16 2004-03-31 Fuji Photo Film Co., Ltd. Inverted galilean finder and camera

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207419A3 (en) * 2000-11-16 2004-03-31 Fuji Photo Film Co., Ltd. Inverted galilean finder and camera

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