GB560609A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB560609A
GB560609A GB1403542A GB1403542A GB560609A GB 560609 A GB560609 A GB 560609A GB 1403542 A GB1403542 A GB 1403542A GB 1403542 A GB1403542 A GB 1403542A GB 560609 A GB560609 A GB 560609A
Authority
GB
United Kingdom
Prior art keywords
abbú
divergent
materials
elements
refractive indices
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
GB1403542A
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 GB1403542A priority Critical patent/GB560609A/en
Publication of GB560609A publication Critical patent/GB560609A/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)
  • Crystals, And After-Treatments Of Crystals (AREA)

Abstract

560,609. Optical objectives. TAYLOR, TAYLOR, & HOBSON, Ltd., WARMISHAM, A., and WYNNE, C. G. Oct. 6, 1942, No. 14035. Drawings to Specification. [Class 97 (i)] In an objective comprising two divergent components located between two simple convergent components and each consisting of a divergent element of material having a relatively low AbbÚ V number compounded with a second element, convergent or divergent, of material having a relatively high AbbÚ V number, the materials of low AbbÚ V numbers have mean refractive indices between. 1.62 and 1.68, and AbbÚ V numbers between 21 and 31, and the materials of all the other elements have refractive indices between 1.70 and 1.80 and AbbÚ V numbers greater than 50 and, preferably, below 58. The materials may all have substantially the same relative partial dispersion, and the difference of refractive indices may be at least .05. The divergent elements may be of alkaline halide crystal and the other four elements may be of #-magnesium oxide crystal. Numerical conditions relating to curvatures are set out, and also complete data for two examples respectively comprising sodium bromide and potassium iodide. Specification 560,540 is referred to.
GB1403542A 1942-10-06 1942-10-06 Improvements in or relating to optical objectives Expired GB560609A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1403542A GB560609A (en) 1942-10-06 1942-10-06 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1403542A GB560609A (en) 1942-10-06 1942-10-06 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB560609A true GB560609A (en) 1944-04-12

Family

ID=10033818

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1403542A Expired GB560609A (en) 1942-10-06 1942-10-06 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB560609A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964726C (en) * 1950-09-14 1957-07-11 Voigtlaender A G Four-unit Gauss lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE964726C (en) * 1950-09-14 1957-07-11 Voigtlaender A G Four-unit Gauss lens

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