GB593514A - Improvements in or relating to lens systems for wide-aperture anastigmatic objectives - Google Patents

Improvements in or relating to lens systems for wide-aperture anastigmatic objectives

Info

Publication number
GB593514A
GB593514A GB2009744A GB2009744A GB593514A GB 593514 A GB593514 A GB 593514A GB 2009744 A GB2009744 A GB 2009744A GB 2009744 A GB2009744 A GB 2009744A GB 593514 A GB593514 A GB 593514A
Authority
GB
United Kingdom
Prior art keywords
lens
anastigmatic
moulded
doublet
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
GB2009744A
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
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB593514A publication Critical patent/GB593514A/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
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/16—Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers, or for use with projectors, e.g. objectives for projection TV

Landscapes

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

Abstract

593,514. Lens systems. JEFFREE, J. H. Oct. 17, 1944, No. 20097. [Class 97 (i)] A lens system for a wide aperture anastigmatic objective consists of, in order of arrangement, a positive doublet of unsymmetrical form with the convex surface or the more convex surface to the front, one or two positive components and a rear divergent component located near the rear conjugate focus and giving the desired anastigmatic correction, the doublet being corrected or over-corrected in order to offset the chromatic aberration of the uncorrected central lens or lenses. The doublet may consist of a front bi-convex lens of methyl methacrylate polymer, the front surface of which may be aspherical, and a bi-concave lens moulded from polystyrene. In the form shown, a bi-convex lens 13 having an aspherical front surface is cemented to a bi-concave lens 14, separated by an air space from single convergent lenses 15, 16 moulded from polymethyl methacrylate, these lenses, in turn, being so separated from a plano-concave lens 17, moulded from polystyrene. The convex surface 12 of a cathode-ray tube located at the rear conjugate focus, is imaged anastigmatically on a screen at the front conjugate focus. Temperature variations may be reduced as described in Specification 561,503, e.g. by making part of the front component of the system of glass. Optical data are given.
GB2009744A 1944-10-17 Improvements in or relating to lens systems for wide-aperture anastigmatic objectives Expired GB593514A (en)

Publications (1)

Publication Number Publication Date
GB593514A true GB593514A (en) 1947-10-20

Family

ID=1735214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2009744A Expired GB593514A (en) 1944-10-17 Improvements in or relating to lens systems for wide-aperture anastigmatic objectives

Country Status (1)

Country Link
GB (1) GB593514A (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989895A (en) * 1958-06-30 1961-06-27 Bell & Howell Co Optical objective
US3516735A (en) * 1968-08-26 1970-06-23 Melpar Inc Large relative aperture plastic lens system
US4300817A (en) * 1978-09-08 1981-11-17 U.S. Precision Lens Incorporated Projection lens
US4348081A (en) * 1979-09-05 1982-09-07 U.S. Precision Lens Inc. Projection lens
JPS6073514A (en) * 1983-09-30 1985-04-25 Hitachi Ltd Lens for projection television
US4526442A (en) * 1981-01-28 1985-07-02 U.S. Precision Lens, Inc. Compact projection lens
FR2558959A1 (en) * 1984-01-26 1985-08-02 Hajime Industries APPARATUS FOR CONTROLLING OBJECT SURFACES
EP0193232A1 (en) * 1985-02-18 1986-09-03 Koninklijke Philips Electronics N.V. Projection-lens system
US4620773A (en) * 1982-05-15 1986-11-04 Hitachi, Ltd. Projection lens for projection television
US4666261A (en) * 1984-04-18 1987-05-19 Konishiroku Photo Industry Co., Ltd. Projection lens for a television projector
US4682862A (en) * 1986-01-17 1987-07-28 U.S. Precision Lens Incorporated Projection lens
US4685774A (en) * 1986-01-17 1987-08-11 U.S. Precision Lens, Incorporated Projection lens
US4697892A (en) * 1983-10-18 1987-10-06 U.S. Precision Lens, Inc. Projection lens
US4707084A (en) * 1984-08-21 1987-11-17 U.S. Precision Lens, Inc. Projection lens
US4755028A (en) * 1986-10-14 1988-07-05 U.S Precision Lens, Incorporated Projection lens with an aspherical corrector lens element
US4776681A (en) * 1986-01-17 1988-10-11 U.S. Precision Lens, Incorporated Projection lens
US4801196A (en) * 1984-08-21 1989-01-31 U.S. Precision Lens, Incorporated Wide angle projection lens
US4815831A (en) * 1985-07-11 1989-03-28 U.S. Precision Lens, Incorporated Projection lens with color correction
US4963007A (en) * 1989-09-05 1990-10-16 U.S. Precision Lens, Inc. Color corrected projection lens

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989895A (en) * 1958-06-30 1961-06-27 Bell & Howell Co Optical objective
US3516735A (en) * 1968-08-26 1970-06-23 Melpar Inc Large relative aperture plastic lens system
US4300817A (en) * 1978-09-08 1981-11-17 U.S. Precision Lens Incorporated Projection lens
US4348081A (en) * 1979-09-05 1982-09-07 U.S. Precision Lens Inc. Projection lens
US4526442A (en) * 1981-01-28 1985-07-02 U.S. Precision Lens, Inc. Compact projection lens
US4620773A (en) * 1982-05-15 1986-11-04 Hitachi, Ltd. Projection lens for projection television
JPS6073514A (en) * 1983-09-30 1985-04-25 Hitachi Ltd Lens for projection television
JPH0578010B2 (en) * 1983-09-30 1993-10-27 Hitachi Ltd
US4697892A (en) * 1983-10-18 1987-10-06 U.S. Precision Lens, Inc. Projection lens
FR2558959A1 (en) * 1984-01-26 1985-08-02 Hajime Industries APPARATUS FOR CONTROLLING OBJECT SURFACES
US4666261A (en) * 1984-04-18 1987-05-19 Konishiroku Photo Industry Co., Ltd. Projection lens for a television projector
US4801196A (en) * 1984-08-21 1989-01-31 U.S. Precision Lens, Incorporated Wide angle projection lens
US4707084A (en) * 1984-08-21 1987-11-17 U.S. Precision Lens, Inc. Projection lens
EP0193232A1 (en) * 1985-02-18 1986-09-03 Koninklijke Philips Electronics N.V. Projection-lens system
US4815831A (en) * 1985-07-11 1989-03-28 U.S. Precision Lens, Incorporated Projection lens with color correction
US4682862A (en) * 1986-01-17 1987-07-28 U.S. Precision Lens Incorporated Projection lens
US4776681A (en) * 1986-01-17 1988-10-11 U.S. Precision Lens, Incorporated Projection lens
US4685774A (en) * 1986-01-17 1987-08-11 U.S. Precision Lens, Incorporated Projection lens
US4755028A (en) * 1986-10-14 1988-07-05 U.S Precision Lens, Incorporated Projection lens with an aspherical corrector lens element
US4963007A (en) * 1989-09-05 1990-10-16 U.S. Precision Lens, Inc. Color corrected projection lens
USRE35310E (en) * 1989-09-05 1996-08-06 U.S. Precision Lens Incorporated Color corrected projection lens

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