GB697910A - Improvements relating to optical lenses - Google Patents

Improvements relating to optical lenses

Info

Publication number
GB697910A
GB697910A GB1775450A GB1775450A GB697910A GB 697910 A GB697910 A GB 697910A GB 1775450 A GB1775450 A GB 1775450A GB 1775450 A GB1775450 A GB 1775450A GB 697910 A GB697910 A GB 697910A
Authority
GB
United Kingdom
Prior art keywords
component
convergent
objective
doublet
optical
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
GB1775450A
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.)
WRAY OPTICAL WORKS Ltd
Original Assignee
WRAY OPTICAL WORKS 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 WRAY OPTICAL WORKS Ltd filed Critical WRAY OPTICAL WORKS Ltd
Priority to GB1775450A priority Critical patent/GB697910A/en
Publication of GB697910A publication Critical patent/GB697910A/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 -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Landscapes

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

Abstract

697,910. Optical objectives. WRAY (OPTICAL WORKS), Ltd., and WYNNE, C. G. Oct. 10, 1951 [July 15, 1950], No. 17754/50. Class 97 (i). An objective comprises a simple divergent component located between a simple rear convergent component and a front convergent component formed of a converted doublet, alone or followed by a single element, the radius of curvature of the front surface of the objective being less than twothirds of that of either of the surfaces of the rear component so that the power of the front component is considerably increased in comparison with that possible in a lens of the same focal length and consisting of three simple components. The front doublet may be a meniscus convex to the front and having a front convergent element of refractive index greater than or equal to that of the rear component. Numerical data are given for one example of the objective shown and for one example in which the element Al is omitted.
GB1775450A 1950-07-15 1950-07-15 Improvements relating to optical lenses Expired GB697910A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1775450A GB697910A (en) 1950-07-15 1950-07-15 Improvements relating to optical lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1775450A GB697910A (en) 1950-07-15 1950-07-15 Improvements relating to optical lenses

Publications (1)

Publication Number Publication Date
GB697910A true GB697910A (en) 1953-09-30

Family

ID=10100640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1775450A Expired GB697910A (en) 1950-07-15 1950-07-15 Improvements relating to optical lenses

Country Status (1)

Country Link
GB (1) GB697910A (en)

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