GB376044A - Improvements in photographic lenses - Google Patents

Improvements in photographic lenses

Info

Publication number
GB376044A
GB376044A GB2185631A GB2185631A GB376044A GB 376044 A GB376044 A GB 376044A GB 2185631 A GB2185631 A GB 2185631A GB 2185631 A GB2185631 A GB 2185631A GB 376044 A GB376044 A GB 376044A
Authority
GB
United Kingdom
Prior art keywords
double
refractive index
cemented
meniscus
class
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
GB2185631A
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 GB2185631A priority Critical patent/GB376044A/en
Publication of GB376044A publication Critical patent/GB376044A/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

376,044. Lenses. LEE, H. W. and KAPELLA, Ltd., 104, Stoughton Street, Leicester. July 31, 1931, No. 21856. [Class 97 (i).] Relates to photographic lenses of the kind described i n Specification 165,657, [Class 97 (il, Opticalsystems &c.], comprising two components, one consisting of a meniscus dispersive element cemented to a meniscus collective element of lower refractive index, and the other consisting of a double convex element cemented to a double concave element of lower refractive index, and a diaphragm, the elements being in the sequence named. According to this invention the refractive index of the double convex element for the D line exceeds 1.63 and that of the double concave element is not less than 1À52 and is less than that of the double convex element by at least 0.1. The Figure shows a lens consisting of two members as defined above with the free surfaces of the double concave elements facing each other, the two lens members being of equal or unequal focal lengths. The two components of each member may be cemented together or, as shown, they may be separated by an air space and the surfaces bounding the air space may have different radii. Numerical data are given.
GB2185631A 1931-07-31 1931-07-31 Improvements in photographic lenses Expired GB376044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2185631A GB376044A (en) 1931-07-31 1931-07-31 Improvements in photographic lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2185631A GB376044A (en) 1931-07-31 1931-07-31 Improvements in photographic lenses

Publications (1)

Publication Number Publication Date
GB376044A true GB376044A (en) 1932-07-07

Family

ID=10169971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2185631A Expired GB376044A (en) 1931-07-31 1931-07-31 Improvements in photographic lenses

Country Status (1)

Country Link
GB (1) GB376044A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2600207A (en) * 1949-04-04 1952-06-10 Taylor Taylor & Hobson Ltd Four component optical objectives having four internal contact surfaces
US2649026A (en) * 1952-03-25 1953-08-18 Eastman Kodak Co Four component apochromatic copying objective
US2779239A (en) * 1954-10-01 1957-01-29 Canon Camera Co Four component high aperture wide angle objective lens
US2834253A (en) * 1954-12-01 1958-05-13 Canon Camera Co High aperture wide angle four component lens
DE1069400B (en) * 1959-11-19
US2926564A (en) * 1956-10-05 1960-03-01 Canon Camera Co High aperture wide angle objective
US3005379A (en) * 1957-10-22 1961-10-24 Jos Schueider & Co High-speed gaussian dual objective
US3023671A (en) * 1956-10-09 1962-03-06 Canon Camera Co Photographic objective

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069400B (en) * 1959-11-19
US2600207A (en) * 1949-04-04 1952-06-10 Taylor Taylor & Hobson Ltd Four component optical objectives having four internal contact surfaces
US2649026A (en) * 1952-03-25 1953-08-18 Eastman Kodak Co Four component apochromatic copying objective
US2779239A (en) * 1954-10-01 1957-01-29 Canon Camera Co Four component high aperture wide angle objective lens
US2834253A (en) * 1954-12-01 1958-05-13 Canon Camera Co High aperture wide angle four component lens
US2926564A (en) * 1956-10-05 1960-03-01 Canon Camera Co High aperture wide angle objective
US3023671A (en) * 1956-10-09 1962-03-06 Canon Camera Co Photographic objective
US3005379A (en) * 1957-10-22 1961-10-24 Jos Schueider & Co High-speed gaussian dual objective

Similar Documents

Publication Publication Date Title
US2321973A (en) Telephoto objective
GB427008A (en) Improvements in lenses for photography and the like
GB376044A (en) Improvements in photographic lenses
US2724994A (en) Photographic objective comprising four meniscus shaped air spaced components
GB487453A (en) Improved lens system
GB372228A (en) Improvements in lenses for photographic and other purposes
US2186605A (en) Optical system
GB321078A (en) Large aperture lenses with improved colour correction
GB535480A (en) Improvements in or relating to objectives suitable for photographic and like purposes
GB522651A (en) Improvements in or relating to optical objectives
GB470522A (en) Improvements in lenses
GB373950A (en) Improvements in photographic and projection lenses
GB532950A (en) Improvements in or relating to optical objectives
GB555464A (en) Improvements in or relating to photographic objectives
GB477448A (en) Improvements in and relating to objectives
US2520019A (en) Microscope objective
GB489381A (en) Improvements in photographic objectives
GB487712A (en) Improvements in photographic objectives
GB481710A (en) Improvements in or relating to optical lens systems
GB381662A (en) Improvement in lenses
GB329144A (en) Improvements in photographic objectives
GB472191A (en) Improvements in and relating to objectives suitable for photographic purposes
GB517946A (en) Improvements in and relating to photographic objectives
GB377537A (en) Improvements in lenses for photography and the like
GB364994A (en) Improvements in photographic three-lens objectives