GB568319A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB568319A
GB568319A GB586843A GB586843A GB568319A GB 568319 A GB568319 A GB 568319A GB 586843 A GB586843 A GB 586843A GB 586843 A GB586843 A GB 586843A GB 568319 A GB568319 A GB 568319A
Authority
GB
United Kingdom
Prior art keywords
convergent
component
taylor
curvature
components
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
GB586843A
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 GB586843A priority Critical patent/GB568319A/en
Publication of GB568319A publication Critical patent/GB568319A/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

568,319. Lenses. TAYLOR, TAYLOR, & HOBSON, Ltd., and COX, A. April 12, 1943, No. 5868. [Class 97 (i)] In a lens having high corrections for comparatively small apertures and narrow semi-angular fields when made up in long focal lengths, and of the type comprising a simple divergent component between two convergent components each consisting of a bi-convex convergent element cemented to a divergent element of lower mean refractive index and AbbÚ V number, the contact surfaces being convex towards the middle component, the mean refractive indices of the two elements of the front convergent component differ from one another by not less than . 055, and the radius of curvature of the contact surface betweeen them lies between .25 and .40 times the focal length of the objective. Other numerical data relative to the desirable optical properties, radii of curvature, and separation of the components are set out, and tables of data for two examples are given.
GB586843A 1943-04-12 1943-04-12 Improvements in or relating to optical objectives Expired GB568319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB586843A GB568319A (en) 1943-04-12 1943-04-12 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB586843A GB568319A (en) 1943-04-12 1943-04-12 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB568319A true GB568319A (en) 1945-03-29

Family

ID=9804113

Family Applications (1)

Application Number Title Priority Date Filing Date
GB586843A Expired GB568319A (en) 1943-04-12 1943-04-12 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB568319A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771007A (en) * 1953-01-15 1956-11-20 Perkin Elmer Corp Objectives comprising two outer positive doublets enclosing a middle negative component for aerial photography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2771007A (en) * 1953-01-15 1956-11-20 Perkin Elmer Corp Objectives comprising two outer positive doublets enclosing a middle negative component for aerial photography

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