GB250268A - Improvements in lenses - Google Patents

Improvements in lenses

Info

Publication number
GB250268A
GB250268A GB8907/26A GB890726A GB250268A GB 250268 A GB250268 A GB 250268A GB 8907/26 A GB8907/26 A GB 8907/26A GB 890726 A GB890726 A GB 890726A GB 250268 A GB250268 A GB 250268A
Authority
GB
United Kingdom
Prior art keywords
lenses
refrangibility
respect
lens
curvature
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
GB8907/26A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB250268A publication Critical patent/GB250268A/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
    • G02B13/08—Anamorphotic objectives

Landscapes

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

Abstract

250,268. Kitajima, I. April 4, 1925, [Convention date]. Lenses.- Comprises a combination lens of variable refractive power made up of two or more cylindrical lenses having regularly increasing refrangibility from one end to the other and arranged crosswise so that by sliding one with respect to the other a variable power is obtained. Each of the component lenses I, II, has an upper convex surface of constant curvature and a lower conical surface of decreasing curvature from the end B to the end A. Several examples of combinations of these lenses are described in the Specification, in some of which the lenses are superimposed so that the refrangibility of one lens is reversed with respect to that of the other.
GB8907/26A 1925-04-04 1926-04-01 Improvements in lenses Expired GB250268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP250268X 1925-04-04

Publications (1)

Publication Number Publication Date
GB250268A true GB250268A (en) 1926-07-29

Family

ID=12154393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8907/26A Expired GB250268A (en) 1925-04-04 1926-04-01 Improvements in lenses

Country Status (1)

Country Link
GB (1) GB250268A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475275A (en) * 1945-01-19 1949-07-05 Birchall Henry James Lens of variable focal power having surfaces of involute form
US2644361A (en) * 1946-09-30 1953-07-07 Us Navy Projection plotting lens and optical system
US3305294A (en) * 1964-12-03 1967-02-21 Optical Res & Dev Corp Two-element variable-power spherical lens
US3617116A (en) * 1969-01-29 1971-11-02 American Optical Corp Method for producing a unitary composite ophthalmic lens
US4108533A (en) * 1975-11-21 1978-08-22 Erwin Sick Gesellschaft Mit Beschrankter Haftung Optik-Elektronik Apparatus for combining light emanating from a linear scanning field
EP0025188A1 (en) * 1979-09-10 1981-03-18 Cerberus Ag Optical arrangement for a photodetector
US4415239A (en) * 1980-10-31 1983-11-15 Humphrey Instruments, Inc. Reflection rejection spherical optical train composed of tipped lens elements
US9238577B2 (en) 2012-09-21 2016-01-19 The University Of North Carolina At Charlotte Dynamic laser beam shaping methods and systems
US9335446B2 (en) 2011-09-01 2016-05-10 Eyejusters Ltd Adjustable refractive optical device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2475275A (en) * 1945-01-19 1949-07-05 Birchall Henry James Lens of variable focal power having surfaces of involute form
US2644361A (en) * 1946-09-30 1953-07-07 Us Navy Projection plotting lens and optical system
US3305294A (en) * 1964-12-03 1967-02-21 Optical Res & Dev Corp Two-element variable-power spherical lens
US3617116A (en) * 1969-01-29 1971-11-02 American Optical Corp Method for producing a unitary composite ophthalmic lens
US4108533A (en) * 1975-11-21 1978-08-22 Erwin Sick Gesellschaft Mit Beschrankter Haftung Optik-Elektronik Apparatus for combining light emanating from a linear scanning field
EP0025188A1 (en) * 1979-09-10 1981-03-18 Cerberus Ag Optical arrangement for a photodetector
US4415239A (en) * 1980-10-31 1983-11-15 Humphrey Instruments, Inc. Reflection rejection spherical optical train composed of tipped lens elements
US9335446B2 (en) 2011-09-01 2016-05-10 Eyejusters Ltd Adjustable refractive optical device
US9238577B2 (en) 2012-09-21 2016-01-19 The University Of North Carolina At Charlotte Dynamic laser beam shaping methods and systems

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