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GB8722022D0 - Bifocal infra-red optical system - Google Patents

Bifocal infra-red optical system

Info

Publication number
GB8722022D0
GB8722022D0 GBGB8722022.4A GB8722022A GB8722022D0 GB 8722022 D0 GB8722022 D0 GB 8722022D0 GB 8722022 A GB8722022 A GB 8722022A GB 8722022 D0 GB8722022 D0 GB 8722022D0
Authority
GB
United Kingdom
Prior art keywords
bifocal
infra
optical system
red optical
red
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.)
Ceased
Application number
GBGB8722022.4A
Other languages
English (en)
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Publication of GB8722022D0 publication Critical patent/GB8722022D0/en
Ceased 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
    • 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
    • G02B15/143—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 three groups only
    • G02B15/1431—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 three groups only the first group being positive
    • G02B15/143105—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 three groups only the first group being positive arranged +-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lenses (AREA)
  • Eyeglasses (AREA)
GBGB8722022.4A 1986-09-23 1987-09-18 Bifocal infra-red optical system Ceased GB8722022D0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8613266A FR2623298B1 (fr) 1986-09-23 1986-09-23 Systeme optique bifocal infrarouge

Publications (1)

Publication Number Publication Date
GB8722022D0 true GB8722022D0 (en) 2009-11-25

Family

ID=9339182

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB8722022.4A Ceased GB8722022D0 (en) 1986-09-23 1987-09-18 Bifocal infra-red optical system

Country Status (5)

Country Link
DE (1) DE3726355A1 (de)
FR (1) FR2623298B1 (de)
GB (1) GB8722022D0 (de)
IT (1) IT1228257B (de)
SE (1) SE8703674L (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4234721C2 (de) * 1991-10-16 1995-10-19 Bodenseewerk Geraetetech Dreilinsenobjektiv
FR2708353A1 (fr) * 1993-07-26 1995-02-03 Bertin & Cie Système de grossissement pour dispositif d'imagerie à balayge opto-mécanique.
US5894371A (en) * 1997-06-06 1999-04-13 Alliedsignal, Inc. Focus mechanism for varifocal lens
DE19828825C2 (de) * 1998-06-27 2000-07-27 Siempelkamp Gmbh & Co Bandpresse, insbesondere Doppelbandpresse
FR2910133B1 (fr) * 2006-12-13 2009-02-13 Thales Sa Systeme d'imagerie ir2-ir3 bi-champ compact
FR2910134B1 (fr) * 2006-12-13 2009-02-13 Thales Sa Systeme d'imagerie ir2-ir3 bi-champ compact
FR2928462B1 (fr) 2008-03-04 2010-06-11 Thales Sa Dispositif optique mixte d'imagerie multi-focale et de calibration ir

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL126309C (de) * 1965-06-10
US3972592A (en) * 1974-10-18 1976-08-03 Eastman Kodak Company Zoom projection lens
GB1559514A (en) * 1976-10-02 1980-01-23 Pilkington Perkin Elmer Ltd Infra-red zoom lenses
JPS5590928A (en) * 1978-12-29 1980-07-10 Olympus Optical Co Ltd Endoscope objective lens which performs changing of magnification and focusing simultaneously

Also Published As

Publication number Publication date
SE8703674D0 (sv) 1987-09-23
SE8703674L (sv) 1989-05-14
FR2623298B1 (fr) 1990-10-05
DE3726355A1 (de) 1989-07-20
IT8721200A0 (it) 1987-07-07
FR2623298A1 (fr) 1989-05-19
IT1228257B (it) 1991-06-05

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)