GB766975A - Improvements in photographic objectives - Google Patents

Improvements in photographic objectives

Info

Publication number
GB766975A
GB766975A GB766855A GB766855A GB766975A GB 766975 A GB766975 A GB 766975A GB 766855 A GB766855 A GB 766855A GB 766855 A GB766855 A GB 766855A GB 766975 A GB766975 A GB 766975A
Authority
GB
United Kingdom
Prior art keywords
component
less
meniscus
collective
dispersive
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
GB766855A
Inventor
Harry Zollner
Rudolf Solisch
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.)
Jenoptik AG
Original Assignee
Carl Zeiss Jena GmbH
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 Jena GmbH filed Critical Carl Zeiss Jena GmbH
Priority to GB766855A priority Critical patent/GB766975A/en
Publication of GB766975A publication Critical patent/GB766975A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives

Landscapes

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

Abstract

766,975. Photographic objectives. VEB C. ZEISS JENA. March 16, 1955, No. 7668/55. Class 97(1) In an objective of the kind consisting of a front dispersive meniscus component situated at a considerable distance from a collective member consisting of two dispersive meniscus components concave to a diaphragm therebetween and enclosed by a front simple collective component and a rear collective meniscus component, the front dispersive meniscus component is simple and has an Abbe number greater than 55 and less than 65, the front component of the collective member is of flint glass of Abbe number greater than 40 and less than 50, the dispersive meniscus in front of the diaphragm consists of two lenses cemented together and having a difference of refractive index greater than 0 and less than 0.2, the dispersive meniscus following the diaphragm is simple and has a refractive, index greater than 1.7 and the refractive index of each lens of the rearmost component is greater than 1.6 and less than 1.7 Numerical data are given for one example of the objective shown and for one in which the rear most compartmen is a cemented doublet.
GB766855A 1955-03-16 1955-03-16 Improvements in photographic objectives Expired GB766975A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB766855A GB766975A (en) 1955-03-16 1955-03-16 Improvements in photographic objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB766855A GB766975A (en) 1955-03-16 1955-03-16 Improvements in photographic objectives

Publications (1)

Publication Number Publication Date
GB766975A true GB766975A (en) 1957-01-30

Family

ID=9837523

Family Applications (1)

Application Number Title Priority Date Filing Date
GB766855A Expired GB766975A (en) 1955-03-16 1955-03-16 Improvements in photographic objectives

Country Status (1)

Country Link
GB (1) GB766975A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962931A (en) * 1958-12-12 1960-12-06 Bell & Howell Co Optical objective

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2962931A (en) * 1958-12-12 1960-12-06 Bell & Howell Co Optical objective

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