GB321078A - Large aperture lenses with improved colour correction - Google Patents

Large aperture lenses with improved colour correction

Info

Publication number
GB321078A
GB321078A GB3431628A GB3431628A GB321078A GB 321078 A GB321078 A GB 321078A GB 3431628 A GB3431628 A GB 3431628A GB 3431628 A GB3431628 A GB 3431628A GB 321078 A GB321078 A GB 321078A
Authority
GB
United Kingdom
Prior art keywords
lenses
dispersive
glasses
cemented
rays
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
GB3431628A
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.)
HORACE WILLIAM LEE
Kapella Ltd
Original Assignee
HORACE WILLIAM LEE
Kapella Ltd
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 HORACE WILLIAM LEE, Kapella Ltd filed Critical HORACE WILLIAM LEE
Priority to GB3431628A priority Critical patent/GB321078A/en
Publication of GB321078A publication Critical patent/GB321078A/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 -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)

Abstract

321,078. Lee, H. W., and Kapella, Ltd. Nov. 22, 1928. Lenses. - A photographic objective corrected for spherical aberration, coma, astigmatism and distortion and also having substantially the same focus and focal length for all the colours of the visible spectrum, comprises two dispersive menisci between two collective lenses. The dispersive lenses are cemented doublets and the collective lenses cemented doublets or triplets, consisting of a dispersive flint glass lens cemented to a crown glass lens or between two such lenses. The glasses are chosen so that the ratio of dispersion of the flint glasses for the rays F and G' of the spectrum to that for the rays C and F does not differ by more than 3 per cent from the corresponding ratio for the crown glasses. Numerical data are given in the Specification for a lens having an aperture of F/2 and an angular flat field of 40‹. Specification 157,040 is referred to.
GB3431628A 1928-11-22 1928-11-22 Large aperture lenses with improved colour correction Expired GB321078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3431628A GB321078A (en) 1928-11-22 1928-11-22 Large aperture lenses with improved colour correction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3431628A GB321078A (en) 1928-11-22 1928-11-22 Large aperture lenses with improved colour correction

Publications (1)

Publication Number Publication Date
GB321078A true GB321078A (en) 1929-10-31

Family

ID=10364113

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3431628A Expired GB321078A (en) 1928-11-22 1928-11-22 Large aperture lenses with improved colour correction

Country Status (1)

Country Link
GB (1) GB321078A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600207A (en) * 1949-04-04 1952-06-10 Taylor Taylor & Hobson Ltd Four component optical objectives having four internal contact surfaces
US2649026A (en) * 1952-03-25 1953-08-18 Eastman Kodak Co Four component apochromatic copying objective
US2986972A (en) * 1958-11-13 1961-06-06 Bruning Charles Co Inc Ultraviolet copying objective lens
US3038380A (en) * 1958-02-27 1962-06-12 Zeiss Carl Asymmetrical photographic objective
DE4022241A1 (en) * 1990-07-12 1992-01-16 Jakob Gies POT OR JUG WITH A HANDLE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600207A (en) * 1949-04-04 1952-06-10 Taylor Taylor & Hobson Ltd Four component optical objectives having four internal contact surfaces
US2649026A (en) * 1952-03-25 1953-08-18 Eastman Kodak Co Four component apochromatic copying objective
US3038380A (en) * 1958-02-27 1962-06-12 Zeiss Carl Asymmetrical photographic objective
US2986972A (en) * 1958-11-13 1961-06-06 Bruning Charles Co Inc Ultraviolet copying objective lens
DE4022241A1 (en) * 1990-07-12 1992-01-16 Jakob Gies POT OR JUG WITH A HANDLE

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