GB547739A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB547739A
GB547739A GB306341A GB306341A GB547739A GB 547739 A GB547739 A GB 547739A GB 306341 A GB306341 A GB 306341A GB 306341 A GB306341 A GB 306341A GB 547739 A GB547739 A GB 547739A
Authority
GB
United Kingdom
Prior art keywords
elements
refractive indices
taylor
lie
objective
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
GB306341A
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 GB306341A priority Critical patent/GB547739A/en
Publication of GB547739A publication Critical patent/GB547739A/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

Abstract

547,739. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., and WARMISHAM, A. March 6, 1941, No. 3063. [Class 97 (i)] In an objective comprising two convergent meniscus components III, IV, one on each side of a diaphragm position, and between two divergent meniscus components I, II and V, VI, each consisting of a double concave element cemented to a double convex component, all airexposed surfaces being concave towards the diaphragm position, the differences between the mean refractive indices of the elements I and II and of V and VI lie between .04 and .09, the refractive indices of the elements I and VI lie between 1.63 and 1.75 and of the elements II and V between 1.56 and 1.68, and the radius R 8 lies between 1.1 and 1.8 times the radius R 3 . The sum of the radii R 3 and R 8 is preferably greater than .38 times the focal length of the objective. The refractive indices of the elements III and IV may be different, one being greater and the other less than that of the adjacent element II or V, and all the refractive indices may be greater than 1.62. Data for three examples are set out.
GB306341A 1941-03-06 1941-03-06 Improvements in or relating to optical objectives Expired GB547739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB306341A GB547739A (en) 1941-03-06 1941-03-06 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB306341A GB547739A (en) 1941-03-06 1941-03-06 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB547739A true GB547739A (en) 1942-09-09

Family

ID=9751282

Family Applications (1)

Application Number Title Priority Date Filing Date
GB306341A Expired GB547739A (en) 1941-03-06 1941-03-06 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB547739A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601595A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2601593A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2635505A (en) * 1951-12-01 1953-04-21 Eastman Kodak Co Photographic objective consisting of two outer negative doublets and two inner positive singlets
US3185030A (en) * 1962-08-22 1965-05-25 Bausch & Lomb Symmetrical projection objective
US3221601A (en) * 1962-07-30 1965-12-07 Bausch & Lomb Four component symmetrical projection objective

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2601595A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2601593A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Four component optical objective
US2635505A (en) * 1951-12-01 1953-04-21 Eastman Kodak Co Photographic objective consisting of two outer negative doublets and two inner positive singlets
US3221601A (en) * 1962-07-30 1965-12-07 Bausch & Lomb Four component symmetrical projection objective
US3185030A (en) * 1962-08-22 1965-05-25 Bausch & Lomb Symmetrical projection objective

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