GB273274A - Improvements in photographic lenses, corrected spherically, chromatically, astigmatically and for coma - Google Patents

Improvements in photographic lenses, corrected spherically, chromatically, astigmatically and for coma

Info

Publication number
GB273274A
GB273274A GB15462/27A GB1546227A GB273274A GB 273274 A GB273274 A GB 273274A GB 15462/27 A GB15462/27 A GB 15462/27A GB 1546227 A GB1546227 A GB 1546227A GB 273274 A GB273274 A GB 273274A
Authority
GB
United Kingdom
Prior art keywords
lens
curvature
lenses
radius
astigmatically
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
GB15462/27A
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 GB273274A publication Critical patent/GB273274A/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

273,274. Zeiss, C. [Firm of]. June 26, 1926, [Convention date]. Lenses. - Photographic lenses, corrected spherically, chromatically, astigmatically and for coma, consisting of three lenses separated by air spaces, as shown, and have the following features. The radius of curvature of the cemented surface of one of the collective lenses is at the most equal to five-sixths of the radius of curvature of the outer surface of this lens, and to half of the focal length of the -complete lens. The radius of curvature of the outer surface of the collective single lens is at least equal to one third of the radius of curvature of the outer surface of the composite lens and at the most equal to it. The total of the absolute values of the radii of curvature of the two outer surfaces of the complete lens is at least three-fourths of the focal length of the lens and the radii of curvature of the biconcave lens is at least nine-tenths of the focal length of the lens, one of the radii being not larger than three and a half times that of the other. Numerical data are given in the Specification.
GB15462/27A 1926-06-26 1927-06-10 Improvements in photographic lenses, corrected spherically, chromatically, astigmatically and for coma Expired GB273274A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE273274X 1926-06-26

Publications (1)

Publication Number Publication Date
GB273274A true GB273274A (en) 1927-08-11

Family

ID=6014372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15462/27A Expired GB273274A (en) 1926-06-26 1927-06-10 Improvements in photographic lenses, corrected spherically, chromatically, astigmatically and for coma

Country Status (1)

Country Link
GB (1) GB273274A (en)

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