ES2056579T3 - Lentes de distancia focal variable. - Google Patents

Lentes de distancia focal variable.

Info

Publication number
ES2056579T3
ES2056579T3 ES91304159T ES91304159T ES2056579T3 ES 2056579 T3 ES2056579 T3 ES 2056579T3 ES 91304159 T ES91304159 T ES 91304159T ES 91304159 T ES91304159 T ES 91304159T ES 2056579 T3 ES2056579 T3 ES 2056579T3
Authority
ES
Spain
Prior art keywords
pair
elements
variable focal
telescope
focal 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 - Lifetime
Application number
ES91304159T
Other languages
English (en)
Inventor
Hilary Gil Sillitto
Alison Brown Lessels
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.)
Leonardo MW Ltd
Original Assignee
GEC Marconi Avionics Holdings 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 GEC Marconi Avionics Holdings Ltd filed Critical GEC Marconi Avionics Holdings Ltd
Application granted granted Critical
Publication of ES2056579T3 publication Critical patent/ES2056579T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
    • 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
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
    • G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Telescopes (AREA)
  • Lenses (AREA)

Abstract

UN TELEOBJETIVO, PARA UTILIZAR EN UN TELESCOPIO EN LONGITUDES DE ONDA DE INFRARROJOS O EN LUZ VISIBLE DE UNA SOLA LONGITUD DE ONDA, PROPORCIONA UN AUMENTO QUE PUEDE AJUSTARSE A CUALQUIERA DE DOS VALORES PREDETERMINADOS. LA LENTE COMPRENDE UN PAR (14) DE ELEMENTOS SIMILARES (15, 16) FIJADOS RELATIVOS EL UNO AL OTRO Y TENIENDO CADA UNO UNA SUPERFICIE CONVEXA ESFERICA CON LAS SUPERFICIES ESFERICAS DEL PAR DE ELEMENTOS EXTREMOS. EL PAR DE ELEMENTOS (14) ESTA SITUADO ENTRE LOS PLANOS DE DOS IMAGENES FORMADAS EN EL TELESCOPIO Y SE MUEVE ENTRE DOS POSICIONES CONJUGADAS.
ES91304159T 1990-05-18 1991-05-09 Lentes de distancia focal variable. Expired - Lifetime ES2056579T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9011160A GB2244344B (en) 1990-05-18 1990-05-18 Infra-red zoom lens

Publications (1)

Publication Number Publication Date
ES2056579T3 true ES2056579T3 (es) 1994-10-01

Family

ID=10676208

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91304159T Expired - Lifetime ES2056579T3 (es) 1990-05-18 1991-05-09 Lentes de distancia focal variable.

Country Status (7)

Country Link
US (1) US5151820A (es)
EP (1) EP0457493B1 (es)
JP (1) JPH04229813A (es)
CA (1) CA2042132A1 (es)
DE (1) DE69103081T2 (es)
ES (1) ES2056579T3 (es)
GB (1) GB2244344B (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2253918B (en) * 1991-03-22 1994-05-04 Gec Ferranti Defence Syst Infrared optical system
US5386315A (en) * 1991-08-26 1995-01-31 Martin Marietta Corporation IR fast low light level lens system
JPH0694991A (ja) * 1992-09-10 1994-04-08 Matsushita Electric Ind Co Ltd 赤外広角単レンズ
US5371626A (en) * 1993-03-09 1994-12-06 Benopcon, Inc. Wide angle binocular system with variable power capability
US5548439A (en) * 1994-12-27 1996-08-20 Hughes Aircraft Company Three field of view refractive infrared telescope with fixed medium filed of view
US5894371A (en) * 1997-06-06 1999-04-13 Alliedsignal, Inc. Focus mechanism for varifocal lens
US5907433A (en) * 1997-06-16 1999-05-25 Versatron Corporation Compact variable field of view optical system
US5959770A (en) * 1998-06-04 1999-09-28 Bushnell Corporation Telescope zoom lens assembly
JP3510809B2 (ja) * 1999-01-22 2004-03-29 ペンタックス株式会社 眼視望遠ズームレンズ系
JP2000284175A (ja) * 1999-03-30 2000-10-13 Fuji Photo Optical Co Ltd ズームレンズ
US6762889B2 (en) * 2001-11-15 2004-07-13 Agilent Technologies, Inc. Compact telephoto lens for grating scale position measuring system

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216319A (en) * 1961-07-26 1965-11-09 Argus Inc Three component variable focal length lens system
FR2044465A5 (es) * 1969-05-21 1971-02-19 Clave Serge
US3890036A (en) * 1974-02-28 1975-06-17 Berkey Photo Inc Zoom lens system
GB1559514A (en) * 1976-10-02 1980-01-23 Pilkington Perkin Elmer Ltd Infra-red zoom lenses
GB1532096A (en) * 1977-05-19 1978-11-15 Pilkington Perkin Elmer Ltd Infra red lenses
BE887757A (fr) * 1980-03-05 1981-07-01 Barr & Stroud Ltd Systeme pour objectifs de lunettes
US4367010A (en) * 1980-08-11 1983-01-04 Sport-O-Scope, Inc. Erecting telescope
GB2085184B (en) * 1980-10-08 1984-12-12 Barr & Stroud Ltd Afocal dual magnification refractor telescopes
DE3342002A1 (de) * 1982-11-23 1984-05-30 Barr & Stroud Ltd., Glasgow, Scotland Mehrlinsiges objektiv zur verwendung im infraroten spektralbereich
GB2138591B (en) * 1983-04-16 1986-05-08 Barr & Stroud Ltd Infrared objective zoom lens assembly
US4548481A (en) * 1983-11-07 1985-10-22 Nippon Kogaku K.K. Variable magnification observation optical device
GB8703402D0 (en) * 1987-02-13 1987-04-08 Pilkington Perkin Elmer Ltd Dual magnification infra-red telescope

Also Published As

Publication number Publication date
US5151820A (en) 1992-09-29
GB9011160D0 (en) 1990-07-04
EP0457493A1 (en) 1991-11-21
GB2244344B (en) 1993-09-29
EP0457493B1 (en) 1994-07-27
DE69103081T2 (de) 1994-11-17
JPH04229813A (ja) 1992-08-19
DE69103081D1 (de) 1994-09-01
GB2244344A (en) 1991-11-27
CA2042132A1 (en) 1991-11-19

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