GB547666A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB547666A
GB547666A GB1714240A GB1714240A GB547666A GB 547666 A GB547666 A GB 547666A GB 1714240 A GB1714240 A GB 1714240A GB 1714240 A GB1714240 A GB 1714240A GB 547666 A GB547666 A GB 547666A
Authority
GB
United Kingdom
Prior art keywords
elements
flint
taylor
objective
divergent
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
GB1714240A
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 GB1714240A priority Critical patent/GB547666A/en
Publication of GB547666A publication Critical patent/GB547666A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

547,666. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., WARMISHAM, A., and WYNNE, C. G. Dec. 2, 1940, Nos. 17142/40 and 12446/41. Drawings to Specification. [Class 97 (i)] In an objective having two or more divergent elements and two or more convergent elements, one of the divergent elements is made of an alkaline halide crystal and all the other elements are of optial glass; the use of the crystal enables good correction for secondary spectrum to be obtained in an objective having small zonal spherical aberration, without sacrificing correction for astigmatism, field curvature and distortion. Data for seven examples, comprising elements of sodium bromide, potassium bromide oriodide, or rubidium iodide, and elements of barium crown and flint, dense flint, light flint and crown, &c. glasses, in various combinations, are set out. Specifications 536,448 and 542,508 are referred to.
GB1714240A 1940-12-02 1940-12-02 Improvements in or relating to optical objectives Expired GB547666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1714240A GB547666A (en) 1940-12-02 1940-12-02 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1714240A GB547666A (en) 1940-12-02 1940-12-02 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB547666A true GB547666A (en) 1942-09-07

Family

ID=10090018

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1714240A Expired GB547666A (en) 1940-12-02 1940-12-02 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB547666A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2645974A (en) * 1951-01-31 1953-07-21 Canon Camera Company Ltd High aperture wide angle six element gauss type objective lens system
US2734422A (en) * 1956-02-14 Inpentorj
US2784643A (en) * 1952-11-18 1957-03-12 Agfa Camera Werk Ag Four-membered gauss type double photographic objective

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734422A (en) * 1956-02-14 Inpentorj
US2645974A (en) * 1951-01-31 1953-07-21 Canon Camera Company Ltd High aperture wide angle six element gauss type objective lens system
US2784643A (en) * 1952-11-18 1957-03-12 Agfa Camera Werk Ag Four-membered gauss type double photographic objective

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