GB278338A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB278338A
GB278338A GB23889/27A GB2388927A GB278338A GB 278338 A GB278338 A GB 278338A GB 23889/27 A GB23889/27 A GB 23889/27A GB 2388927 A GB2388927 A GB 2388927A GB 278338 A GB278338 A GB 278338A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
meniscus
photographic objectives
astigmatically
chromatically
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
GB23889/27A
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 GB278338A publication Critical patent/GB278338A/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)
  • Lenses (AREA)

Abstract

278,338. Zeiss, C., [Firm of]. Sept. 28, 1926, [Convention date]. Lenses. - Photographic objectives corrected spherically, chromatically astigmatically and for coma have each half consisting of a separate collective meniscus facing the diaphragm and a cemented doublet. Each half is so constructed that incident parallel rays coming from the side of the meniscus through a small diaphragm at the larger angles intersect each other in such a manner that the sagittal and tangential points of intersection of the rays follow each other with both halves in opposite sense. Numerical data are given in the Specification of such a lens having an aperture of F/4.5.
GB23889/27A 1926-09-28 1927-09-12 Improvements in photographic objectives Expired GB278338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE278338X 1926-09-28

Publications (1)

Publication Number Publication Date
GB278338A true GB278338A (en) 1927-12-08

Family

ID=6028498

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23889/27A Expired GB278338A (en) 1926-09-28 1927-09-12 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB278338A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601595A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2635505A (en) * 1951-12-01 1953-04-21 Eastman Kodak Co Photographic objective consisting of two outer negative doublets and two inner positive singlets

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601595A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2635505A (en) * 1951-12-01 1953-04-21 Eastman Kodak Co Photographic objective consisting of two outer negative doublets and two inner positive singlets

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