GB320795A - Improvements in lenses - Google Patents

Improvements in lenses

Info

Publication number
GB320795A
GB320795A GB3290828A GB3290828A GB320795A GB 320795 A GB320795 A GB 320795A GB 3290828 A GB3290828 A GB 3290828A GB 3290828 A GB3290828 A GB 3290828A GB 320795 A GB320795 A GB 320795A
Authority
GB
United Kingdom
Prior art keywords
convergent
cemented
posterior
anterior
lenses
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
GB3290828A
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.)
Kapella Ltd
Original Assignee
Kapella 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 Kapella Ltd filed Critical Kapella Ltd
Priority to GB3290828A priority Critical patent/GB320795A/en
Publication of GB320795A publication Critical patent/GB320795A/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

320,795. Warmisham, A., and Kapella, Ltd. Nav. 10, 1928. Lenses. - Photographic objectives, of the type described in Specification 224,425 comprising a divergent member between an anterior convergent member and two posterior convergent members, have a simple divergent member, an anterior cemented doublet, and two posterior cemented doublets or triplets, the cemented surfaces in each case being convergent. Numerical data are given for a lens with an aperture of F/1.4, and an astigmatic correction of field over a semi-angle of 15‹.
GB3290828A 1928-11-10 1928-11-10 Improvements in lenses Expired GB320795A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3290828A GB320795A (en) 1928-11-10 1928-11-10 Improvements in lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3290828A GB320795A (en) 1928-11-10 1928-11-10 Improvements in lenses

Publications (1)

Publication Number Publication Date
GB320795A true GB320795A (en) 1929-10-24

Family

ID=10345798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3290828A Expired GB320795A (en) 1928-11-10 1928-11-10 Improvements in lenses

Country Status (1)

Country Link
GB (1) GB320795A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011401A (en) * 1958-09-12 1961-12-05 Bell & Howell Co Optical objective

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3011401A (en) * 1958-09-12 1961-12-05 Bell & Howell Co Optical objective

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