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GB619818A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB619818A
GB619818A GB3803146A GB3803146A GB619818A GB 619818 A GB619818 A GB 619818A GB 3803146 A GB3803146 A GB 3803146A GB 3803146 A GB3803146 A GB 3803146A GB 619818 A GB619818 A GB 619818A
Authority
GB
United Kingdom
Prior art keywords
objective
plane
taylor
focal length
doublets
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
GB3803146A
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 GB3803146A priority Critical patent/GB619818A/en
Publication of GB619818A publication Critical patent/GB619818A/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
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration

Landscapes

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

Abstract

619,818. Optical objectives. TAYLOR, TAYLOR & HOBSON, Ltd., and WARMISHAM, A. Dec. 30, 1946, No. 38031. [Class 97 (i)] A corrected objective comprises two members separated by an air space lying between 0.6 and 1.2 times the equivalent focal length of the rear member, the rear member consisting of three convergent achromatic doublets and having an overall axial length between .50 and .85 times such equivalent focal length, whilst the front member consists of a simple element having one surface slightly aspherical. The contact surfaces of the doublets may be cemented or broken. The objective is intended particularly for projecting the image of a spherically curved object, such as a television screen, on to a plane surface or alternatively for photographing a plane object on a curved film. Data for one example of the objective shown are given, the simple member being a plane parallel glass plate with the surface R1 slightly aspherical. Specification 610,269 is referred to.
GB3803146A 1946-12-30 1946-12-30 Improvements in or relating to optical objectives Expired GB619818A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3803146A GB619818A (en) 1946-12-30 1946-12-30 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3803146A GB619818A (en) 1946-12-30 1946-12-30 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB619818A true GB619818A (en) 1949-03-15

Family

ID=10400714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3803146A Expired GB619818A (en) 1946-12-30 1946-12-30 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB619818A (en)

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