GB487453A - Improved lens system - Google Patents

Improved lens system

Info

Publication number
GB487453A
GB487453A GB1177437A GB1177437A GB487453A GB 487453 A GB487453 A GB 487453A GB 1177437 A GB1177437 A GB 1177437A GB 1177437 A GB1177437 A GB 1177437A GB 487453 A GB487453 A GB 487453A
Authority
GB
United Kingdom
Prior art keywords
menisci
lens
lens system
lenses
divergent
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
GB1177437A
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.)
BERTRAM LANGTON
J H DALLMEYER Ltd
Original Assignee
BERTRAM LANGTON
J H DALLMEYER 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 BERTRAM LANGTON, J H DALLMEYER Ltd filed Critical BERTRAM LANGTON
Priority to GB1177437A priority Critical patent/GB487453A/en
Publication of GB487453A publication Critical patent/GB487453A/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)
  • Lenses (AREA)

Abstract

487,453. Lenses. DALLMEYER, Ltd., J. H., and LANGTON, B. April 24, 1937, No. 11774. [Class 97 (i)] In a lens system corrected for spherical and chromatic aberrations, astigmatism, and coma, and consisting of two single convergent menisci enclosing between them two single divergent, menisci, the concave surfaces of all the menisci being turned towards the diaphragm placed between the divergent lenses, the front posi. tive lens is made of crown glass there. fractive index of which is at least 1À62 and exceeds that of the rear positive lens. The total vertex length of the system does not exceed one-seventh of the focal length. Data are given for the example shown, having an aperture F /8.
GB1177437A 1937-04-24 1937-04-24 Improved lens system Expired GB487453A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1177437A GB487453A (en) 1937-04-24 1937-04-24 Improved lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1177437A GB487453A (en) 1937-04-24 1937-04-24 Improved lens system

Publications (1)

Publication Number Publication Date
GB487453A true GB487453A (en) 1938-06-21

Family

ID=9992446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1177437A Expired GB487453A (en) 1937-04-24 1937-04-24 Improved lens system

Country Status (1)

Country Link
GB (1) GB487453A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499264A (en) * 1944-02-25 1950-02-28 Wray Optical Works Ltd Large aperture spherically corrected objective having two outer positive components and two inner negative meniscus components with one cemented surface
US2518719A (en) * 1946-02-09 1950-08-15 Eastman Kodak Co Wide-angle camera objective
US2559875A (en) * 1949-12-21 1951-07-10 Eastman Kodak Co Wide angle corrected photographic objective comprising four meniscus components in axial alignment
US2601592A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Corrected optical objective comprising six simple components axially aligned and air spaced apart
US2601594A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Corrected optical objective comprising six simple components axially aligned and air spaced apart
US5015079A (en) * 1988-07-30 1991-05-14 Asahi Kogaku Kogyo Kabushiki Kaisha Copying lens system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499264A (en) * 1944-02-25 1950-02-28 Wray Optical Works Ltd Large aperture spherically corrected objective having two outer positive components and two inner negative meniscus components with one cemented surface
US2518719A (en) * 1946-02-09 1950-08-15 Eastman Kodak Co Wide-angle camera objective
US2559875A (en) * 1949-12-21 1951-07-10 Eastman Kodak Co Wide angle corrected photographic objective comprising four meniscus components in axial alignment
US2601592A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Corrected optical objective comprising six simple components axially aligned and air spaced apart
US2601594A (en) * 1951-02-15 1952-06-24 Taylor Taylor & Hobson Ltd Corrected optical objective comprising six simple components axially aligned and air spaced apart
US5015079A (en) * 1988-07-30 1991-05-14 Asahi Kogaku Kogyo Kabushiki Kaisha Copying lens system

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