GB256586A - Improvements in photographic lenses - Google Patents

Improvements in photographic lenses

Info

Publication number
GB256586A
GB256586A GB16540/26A GB1654026A GB256586A GB 256586 A GB256586 A GB 256586A GB 16540/26 A GB16540/26 A GB 16540/26A GB 1654026 A GB1654026 A GB 1654026A GB 256586 A GB256586 A GB 256586A
Authority
GB
United Kingdom
Prior art keywords
collective
triplet
members
cemented
central element
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
GB16540/26A
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 GB256586A publication Critical patent/GB256586A/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

256,586. Zeiss, C. [Firm of]. Aug. 6, 1925, [Convention date]. Lenses corrected spherically, chromatically, astigmatically and for coma, consisting of three members, a dispersive member between two collective members and in which one of the collective members is a triplet, have the cemented surface nearer the dispersive member, collective in the construction in which the central element of the triplet is biconvex. When the central element of the triplet is biconcave, Fig. 3, both cemented surfaces are collective. In this example, the other collective member may also be constructed as a cemented doublet. Numerical data for three examples are given in the Specification. Specification 247,134 is referred to.
GB16540/26A 1925-08-06 1926-07-01 Improvements in photographic lenses Expired GB256586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE256586X 1925-08-06

Publications (1)

Publication Number Publication Date
GB256586A true GB256586A (en) 1927-07-21

Family

ID=5966329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16540/26A Expired GB256586A (en) 1925-08-06 1926-07-01 Improvements in photographic lenses

Country Status (1)

Country Link
GB (1) GB256586A (en)

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