GB702629A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB702629A
GB702629A GB33952A GB33952A GB702629A GB 702629 A GB702629 A GB 702629A GB 33952 A GB33952 A GB 33952A GB 33952 A GB33952 A GB 33952A GB 702629 A GB702629 A GB 702629A
Authority
GB
United Kingdom
Prior art keywords
objective
taylor
whilst
lies
front surface
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
GB33952A
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 GB33952A priority Critical patent/GB702629A/en
Publication of GB702629A publication Critical patent/GB702629A/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

Landscapes

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

Abstract

702,629. Optical objectives. COLEMAN, K. R., and TAYLOR, TAYLOR, & HOBSON, Ltd. Dec. 17, 1952 [Jan. 4, 1952], No. 339/52. Class 97(1) A corrected objective particular for optical projection, comprises a convergent front member axially spaced from a rear member which comprises a divergent doublet component having a highly dispersive front surface and an internal contact surface convex to the front, located in front of two simple convergent components each having an equivalent focal length less than 3F, where F is the equivalent focal length of the complete objective, whilst the axial thickness of the doublet lies between .20F and .40F, the materials of all the elements of the objective having mean refractive indices greater than 1.580 whilst the front focal point of the objective lies between two planes respectively located .15F is front of the front surface of the objective and 50F behind such front surface. Numerical data are given for one example of the objective shown for one example in which the front member consists of a simple positive meniscus component convex towards the front.
GB33952A 1952-01-04 1952-01-04 Improvements in or relating to optical objectives Expired GB702629A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33952A GB702629A (en) 1952-01-04 1952-01-04 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33952A GB702629A (en) 1952-01-04 1952-01-04 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB702629A true GB702629A (en) 1954-01-20

Family

ID=9702656

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33952A Expired GB702629A (en) 1952-01-04 1952-01-04 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB702629A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1255944B (en) * 1955-12-30 1967-12-07 Taylor Taylor & Hobson Ltd Telecentric or almost telecentric lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1255944B (en) * 1955-12-30 1967-12-07 Taylor Taylor & Hobson Ltd Telecentric or almost telecentric lens

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