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GB209371A - Improvements in lenses - Google Patents

Improvements in lenses

Info

Publication number
GB209371A
GB209371A GB1861923A GB1861923A GB209371A GB 209371 A GB209371 A GB 209371A GB 1861923 A GB1861923 A GB 1861923A GB 1861923 A GB1861923 A GB 1861923A GB 209371 A GB209371 A GB 209371A
Authority
GB
United Kingdom
Prior art keywords
component
lenses
collective
compound
dispersive
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
GB1861923A
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.)
HORACE WILLIAM LEE
Kapella Ltd
Original Assignee
HORACE WILLIAM LEE
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 HORACE WILLIAM LEE, Kapella Ltd filed Critical HORACE WILLIAM LEE
Priority to GB1861923A priority Critical patent/GB209371A/en
Publication of GB209371A publication Critical patent/GB209371A/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 -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

Landscapes

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

Abstract

209,371. Lee, H. W., and Kapella, Ltd. July 19, 1923. Lenses.-Photographic lenses, having improved correction of the zonal spherical aberration and improved apochromatism, are constructed of four lenses, i.e. a single collective component, a single dispersive component and a compound collective component, in this order. The axial separation between the dispersive component and the compound collective component is not less than three times that between the dispersive component and the single collective component. The compound collective component has a collective cemented surface R<6> with its concavity turned inwards and a radius of curvature not greater than one half of the focal length of the complete system. The lenses are of glasses having substantially the same relative dispersion. Specifications 22607/93, 15107/95 and 13061/02, [Class 98, Photography], are referred to.
GB1861923A 1923-07-19 1923-07-19 Improvements in lenses Expired GB209371A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1861923A GB209371A (en) 1923-07-19 1923-07-19 Improvements in lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1861923A GB209371A (en) 1923-07-19 1923-07-19 Improvements in lenses

Publications (1)

Publication Number Publication Date
GB209371A true GB209371A (en) 1924-01-10

Family

ID=10115551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1861923A Expired GB209371A (en) 1923-07-19 1923-07-19 Improvements in lenses

Country Status (1)

Country Link
GB (1) GB209371A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446402A (en) * 1946-09-21 1948-08-03 Eastman Kodak Co Camera lens
US2502508A (en) * 1948-10-18 1950-04-04 Taylor Taylor & Hobson Ltd Highly corrected three component optical objectives of large aperture
US2599669A (en) * 1950-05-09 1952-06-10 Northrop Aircraft Inc Three-component four-element objective
US4400065A (en) * 1981-05-18 1983-08-23 Albert Nagler Multi-purpose telescope

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446402A (en) * 1946-09-21 1948-08-03 Eastman Kodak Co Camera lens
US2502508A (en) * 1948-10-18 1950-04-04 Taylor Taylor & Hobson Ltd Highly corrected three component optical objectives of large aperture
US2599669A (en) * 1950-05-09 1952-06-10 Northrop Aircraft Inc Three-component four-element objective
US4400065A (en) * 1981-05-18 1983-08-23 Albert Nagler Multi-purpose telescope

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