GB868201A - Optical lens systems - Google Patents

Optical lens systems

Info

Publication number
GB868201A
GB868201A GB14310/60A GB1431060A GB868201A GB 868201 A GB868201 A GB 868201A GB 14310/60 A GB14310/60 A GB 14310/60A GB 1431060 A GB1431060 A GB 1431060A GB 868201 A GB868201 A GB 868201A
Authority
GB
United Kingdom
Prior art keywords
lens
objective
biconcave lens
positive
biconcave
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
GB14310/60A
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.)
Recon Optical Inc
Original Assignee
Chicago Aerial Industries Inc
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 Chicago Aerial Industries Inc filed Critical Chicago Aerial Industries Inc
Publication of GB868201A publication Critical patent/GB868201A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Landscapes

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

Abstract

868,201. Optical objectives. CHICAGO AERIAL INDUSTRIES Inc. Aug. 8, 1957 [Oct. 16, 1956; Dec. 7, 1956], No. 14310/60. Divided out of 868,200. Class 97(1) An optical objective includes a biconcave lens followed by two positive lenses, a second biconcave lens and a third positive lens, the firstbiconcave lens having at least five times the power of the second biconcave lens. Preferably, and as shown, the first biconcave lens I and the first positive lens II are cemented together as also are the second biconcave lens IV and the third positive lens V. Optical data are given for one example of the objective 10 shown, which has an angle of field of about 85 degrees and which is associated with a field lens 12 having an aspherical surface to correct for distortion introduced by the objective 10. The objective may form the front member of a view-finder as described in Specification 868,200.
GB14310/60A 1956-10-16 1957-08-08 Optical lens systems Expired GB868201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US868201XA 1956-10-16 1956-10-16

Publications (1)

Publication Number Publication Date
GB868201A true GB868201A (en) 1961-05-17

Family

ID=22201132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14310/60A Expired GB868201A (en) 1956-10-16 1957-08-08 Optical lens systems

Country Status (1)

Country Link
GB (1) GB868201A (en)

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