GB658349A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB658349A
GB658349A GB911049A GB911049A GB658349A GB 658349 A GB658349 A GB 658349A GB 911049 A GB911049 A GB 911049A GB 911049 A GB911049 A GB 911049A GB 658349 A GB658349 A GB 658349A
Authority
GB
United Kingdom
Prior art keywords
divergent
convergent
components
optical
taylor
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
GB911049A
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.)
Taylor Taylor and Hobson Ltd
Original Assignee
Taylor Taylor and Hobson 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 Taylor Taylor and Hobson Ltd filed Critical Taylor Taylor and Hobson Ltd
Priority to GB911049A priority Critical patent/GB658349A/en
Publication of GB658349A publication Critical patent/GB658349A/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

658,349. Optical objectives. COOK, G.H., and TAYLOR, TAYLOR & HOBSON, Ltd. April 4, 1949, Nos. 9110/49 and 6083/50. [Class 97 (i)] In an optical objective which comprises two divergent meniscus inner components 2, 3 having their air-exposed surfaces concave towards a diaphragm between them and located between two convergent outer components 1, 4, each of the four components is in the form of a doublet having a divergent inner element and a convergent outer element and the mean refractive index of the material of the divergent element in each inner component exceeds that of the material of the associated convergent element by between 0.03 and 0.12 and the mean refractive index of the material of the convergent element in each outer component exceeds that of the associated divergent element by between 0.05 and 0.20. Optical data are given for two examples of the lens shown and for one example in which the internal contact surface of each negative doublet is concave towards the diaphragm. The first Provisional Specification includes data for another example of the lens shown.
GB911049A 1949-04-04 1949-04-04 Improvements in or relating to optical objectives Expired GB658349A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB911049A GB658349A (en) 1949-04-04 1949-04-04 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB911049A GB658349A (en) 1949-04-04 1949-04-04 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB658349A true GB658349A (en) 1951-10-10

Family

ID=9865549

Family Applications (1)

Application Number Title Priority Date Filing Date
GB911049A Expired GB658349A (en) 1949-04-04 1949-04-04 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB658349A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199015B (en) * 1954-04-07 1965-08-19 Taylor Taylor & Hobson Ltd Anamorphic lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1199015B (en) * 1954-04-07 1965-08-19 Taylor Taylor & Hobson Ltd Anamorphic lens

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