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GB461554A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB461554A
GB461554A GB31133/36A GB3113336A GB461554A GB 461554 A GB461554 A GB 461554A GB 31133/36 A GB31133/36 A GB 31133/36A GB 3113336 A GB3113336 A GB 3113336A GB 461554 A GB461554 A GB 461554A
Authority
GB
United Kingdom
Prior art keywords
members
divergent
convergent
lenses
nov
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
GB31133/36A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB461554A publication Critical patent/GB461554A/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
    • G02B13/04—Reversed telephoto objectives

Landscapes

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

Abstract

461,554. Lenses. ZEISS, C., [Firm of]. Nov. 14, 1936, No. 31133. Convention date, Nov. 26, 1935. [Class 97 (i)] In a photographic objective for large image fields consisting of three members separated by air, the front member being divergent, the rear and medial members are menisci with concave sides facing the front member and are respectively convergent and divergent, the focal length of the convergent member is numerically at most two-fifths of that of either divergent member, and the distance apart of the front vertices of the first and second members is at least three quarters of the focal length of the whole system. The rear member is a doublet consisting of two lenses of different refractive indices with a convergent cemented surface. The air space between the rear and medial members is less than one tenth of the distance between the front vertices of the front two members. Data are given for the example shown which is spherically corrected for an aperture f /8.
GB31133/36A 1935-11-26 1936-11-14 Improvements in photographic objectives Expired GB461554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE461554X 1935-11-26

Publications (1)

Publication Number Publication Date
GB461554A true GB461554A (en) 1937-02-18

Family

ID=6539880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31133/36A Expired GB461554A (en) 1935-11-26 1936-11-14 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB461554A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791153A (en) * 1952-09-25 1957-05-07 Felix L Bednarz Wide angle lens system
US5579174A (en) * 1993-11-12 1996-11-26 Asahi Kogaku Kogyo Kabushiki Kaisha Objective lens for endoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791153A (en) * 1952-09-25 1957-05-07 Felix L Bednarz Wide angle lens system
US5579174A (en) * 1993-11-12 1996-11-26 Asahi Kogaku Kogyo Kabushiki Kaisha Objective lens for endoscope

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