GB369833A - Improvements in photographic three-lens objectives - Google Patents

Improvements in photographic three-lens objectives

Info

Publication number
GB369833A
GB369833A GB19829/31A GB1982931A GB369833A GB 369833 A GB369833 A GB 369833A GB 19829/31 A GB19829/31 A GB 19829/31A GB 1982931 A GB1982931 A GB 1982931A GB 369833 A GB369833 A GB 369833A
Authority
GB
United Kingdom
Prior art keywords
objective
ratio
lens
less
lenses
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
GB19829/31A
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 GB369833A publication Critical patent/GB369833A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Landscapes

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

Abstract

369,833. Lenses. ZEISS, C. [Firm of], Carl Zeiss-Strasse, Jena, Germany. July 10, 1931, No. 19829. Convention date, July 17, 1930. [Class 97 (i).] A photographic objective of great light-transmitting power consisting of a dispersive lens arranged with intervening air spaces between two converging lenses of which one is compound and consists of a converging and a diverging element, is characterized by the features (a) that the ratio of the radius of curvature of the front surface of the single dispersive lens to that of the first refracting surface of the objective, i.e. r3 /r1, is numerically greater than 2À5, (b) that the ratio of the radius of the last refracting surface of the objective to that of the second surface of the single dispersive lens, i.e. r7/r4 is numerically less than 1À75 and less than the ratio r3 /r1, and (c) that the vertex distance between the first and second lenses I, II of the objective is less than 1À5 times the vertex thickness of the lens II, the ratio between these distances being preferably less than 1À33. The cemented surface of the compound lens is convex towards the interior of the objective. Numerical data are given.
GB19829/31A 1930-07-17 1931-07-10 Improvements in photographic three-lens objectives Expired GB369833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE369833X 1930-07-17

Publications (1)

Publication Number Publication Date
GB369833A true GB369833A (en) 1932-03-31

Family

ID=6318337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19829/31A Expired GB369833A (en) 1930-07-17 1931-07-10 Improvements in photographic three-lens objectives

Country Status (1)

Country Link
GB (1) GB369833A (en)

Similar Documents

Publication Publication Date Title
GB361793A (en) Improvements in projection objectives
GB369833A (en) Improvements in photographic three-lens objectives
GB376044A (en) Improvements in photographic lenses
GB329350A (en) Improvements in or relating to optical lenses
GB364994A (en) Improvements in photographic three-lens objectives
GB530506A (en) Improvements in or connected with eye-pieces for optical instruments
GB303787A (en) An inverting lens system for telescopes
GB329144A (en) Improvements in photographic objectives
GB496865A (en) Improvements in four-lens photo-objectives
GB335335A (en) Photographic objective lenses
GB232531A (en)
GB517386A (en) Improvements in or relating to optical objectives
GB312536A (en) Improvements in objectives
GB536556A (en) Improvements in or relating to telephoto objectives
GB335084A (en) Improvements in photographic lenses
US2520019A (en) Microscope objective
GB555464A (en) Improvements in or relating to photographic objectives
GB350717A (en) Photographic objectives
GB487712A (en) Improvements in photographic objectives
GB278338A (en) Improvements in photographic objectives
GB353338A (en) Improvements in converging optical systems imaging the image projected by a microscope objective
GB477424A (en) Improvements in objectives
GB220614A (en)
GB489381A (en) Improvements in photographic objectives
GB235817A (en) Improvements in and relating to optical lenses