GB1513314A - Lenses - Google Patents

Lenses

Info

Publication number
GB1513314A
GB1513314A GB604376A GB604376A GB1513314A GB 1513314 A GB1513314 A GB 1513314A GB 604376 A GB604376 A GB 604376A GB 604376 A GB604376 A GB 604376A GB 1513314 A GB1513314 A GB 1513314A
Authority
GB
United Kingdom
Prior art keywords
lens
annular
iii
moveable
focal length
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
GB604376A
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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 Rank Organization Ltd filed Critical Rank Organization Ltd
Priority to GB604376A priority Critical patent/GB1513314A/en
Publication of GB1513314A publication Critical patent/GB1513314A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0896—Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0804—Catadioptric systems using two curved mirrors
    • G02B17/0808—Catadioptric systems using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0852—Catadioptric systems having a field corrector only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08—Catadioptric systems
    • G02B17/0884—Catadioptric systems having a pupil corrector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

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

Abstract

1513314 Dual focus objectives RANK ORGANISATION Ltd 13 Jan 1977 [16 Feb 1976] 06043/76 Heading G2J As described, a catadiaoptric objective comprises the following stationary components, a front annular lens L I ; a first annular concave reflector M I ; a first central reflector M II ; a lens arrangement L III , L IV , L V ; a second annular concave reflector M III ; a second annular central reflector M IV ; a lens component L VI ; shutters S1-S3: and an axially moveable annular lens L II . Long focal length (bottom of Fig.). The moveable annular lens L II is adjacent front lens L I and the pair is substantially afocal. Light is reflected from mirrors M I M II to the lens combination L III - L VI and thence via lens L VI to the focal plane. Short focal length (top of Fig.). The moveable lens L II is adjacent mirror M I . Light is converged by front lens to miss mirror M I but to pass through an annular area of lens combination L IV L V . Subsequently light is focused at the focal plane by the further catoptric system M III M IV and common lens L VI . DATA for both configurations are given. The optical arrangement may be such that the moveable lens is operative in the short focal length configuration only. Margin type reflectors may be used.
GB604376A 1977-01-13 1977-01-13 Lenses Expired GB1513314A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB604376A GB1513314A (en) 1977-01-13 1977-01-13 Lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB604376A GB1513314A (en) 1977-01-13 1977-01-13 Lenses

Publications (1)

Publication Number Publication Date
GB1513314A true GB1513314A (en) 1978-06-07

Family

ID=9807383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB604376A Expired GB1513314A (en) 1977-01-13 1977-01-13 Lenses

Country Status (1)

Country Link
GB (1) GB1513314A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378886A1 (en) * 1987-11-27 1990-07-25 GEC-Marconi Limited Optical system
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5568315A (en) * 1991-05-28 1996-10-22 Discovision Associates Optical beamsplitter
WO2009070213A1 (en) * 2007-11-27 2009-06-04 Eastman Kodak Company Dual focal length lens system
WO2011098960A1 (en) * 2010-02-10 2011-08-18 Opgal Optronic Industries Ltd. An improved optical instrument
US8953084B2 (en) 2012-05-30 2015-02-10 Digimarc Corporation Plural focal-plane imaging

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378886A1 (en) * 1987-11-27 1990-07-25 GEC-Marconi Limited Optical system
US4950056A (en) * 1987-11-27 1990-08-21 Gec-Marconi Limited Optical system
US5657164A (en) 1991-05-28 1997-08-12 Discovision Associates Optical beamsplitter
US5568315A (en) * 1991-05-28 1996-10-22 Discovision Associates Optical beamsplitter
US5646778A (en) * 1991-05-28 1997-07-08 Discovision Associates Optical beamsplitter
US5650874A (en) 1991-05-28 1997-07-22 Discovision Associates Optical beamsplitter
US5331622A (en) * 1991-05-28 1994-07-19 Applied Magnetics Corporation Compact optical head
US5771122A (en) 1991-05-28 1998-06-23 Discovision Associates Optical beamsplitter
WO2009070213A1 (en) * 2007-11-27 2009-06-04 Eastman Kodak Company Dual focal length lens system
US7764440B2 (en) 2007-11-27 2010-07-27 Eastman Kodak Company Dual focal length lens system
CN101874219B (en) * 2007-11-27 2012-09-05 伊斯曼柯达公司 Dual focal length lens system
WO2011098960A1 (en) * 2010-02-10 2011-08-18 Opgal Optronic Industries Ltd. An improved optical instrument
US9188772B2 (en) 2010-02-10 2015-11-17 Opgal Optronic Industries Ltd. Optical instrument
US8953084B2 (en) 2012-05-30 2015-02-10 Digimarc Corporation Plural focal-plane imaging

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee