IT1228257B - INFRARED BIFOCAL OPTICAL SYSTEM - Google Patents

INFRARED BIFOCAL OPTICAL SYSTEM

Info

Publication number
IT1228257B
IT1228257B IT8721200A IT2120087A IT1228257B IT 1228257 B IT1228257 B IT 1228257B IT 8721200 A IT8721200 A IT 8721200A IT 2120087 A IT2120087 A IT 2120087A IT 1228257 B IT1228257 B IT 1228257B
Authority
IT
Italy
Prior art keywords
infrared
optical system
bifocal optical
bifocal
optical
Prior art date
Application number
IT8721200A
Other languages
Italian (it)
Other versions
IT8721200A0 (en
Inventor
Jean-Claude Perrin
Original Assignee
Trt Telecom Radio Electr
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 Trt Telecom Radio Electr filed Critical Trt Telecom Radio Electr
Publication of IT8721200A0 publication Critical patent/IT8721200A0/en
Application granted granted Critical
Publication of IT1228257B publication Critical patent/IT1228257B/en

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)
IT8721200A 1986-09-23 1987-07-07 INFRARED BIFOCAL OPTICAL SYSTEM IT1228257B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8613266A FR2623298B1 (en) 1986-09-23 1986-09-23 INFRARED BIFOCAL OPTICAL SYSTEM

Publications (2)

Publication Number Publication Date
IT8721200A0 IT8721200A0 (en) 1987-07-07
IT1228257B true IT1228257B (en) 1991-06-05

Family

ID=9339182

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8721200A IT1228257B (en) 1986-09-23 1987-07-07 INFRARED BIFOCAL OPTICAL SYSTEM

Country Status (5)

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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4234721C2 (en) * 1991-10-16 1995-10-19 Bodenseewerk Geraetetech Three lens lens
FR2708353A1 (en) * 1993-07-26 1995-02-03 Bertin & Cie Magnification system for an imaging device with optomechanical scanning
US5894371A (en) * 1997-06-06 1999-04-13 Alliedsignal, Inc. Focus mechanism for varifocal lens
DE19828825C2 (en) * 1998-06-27 2000-07-27 Siempelkamp Gmbh & Co Belt press, in particular double belt press
FR2910133B1 (en) * 2006-12-13 2009-02-13 Thales Sa IMAGING SYSTEM IR2-IR3 BI-FIELD COMPACT
FR2910134B1 (en) * 2006-12-13 2009-02-13 Thales Sa IMAGING SYSTEM IR2-IR3 BI-FIELD COMPACT
FR2928462B1 (en) 2008-03-04 2010-06-11 Thales Sa MIXED OPTICAL DEVICE FOR MULTI-FOCAL IMAGING AND IR CALIBRATION

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL126309C (en) * 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
FR2623298A1 (en) 1989-05-19
GB8722022D0 (en) 2009-11-25
DE3726355A1 (en) 1989-07-20
FR2623298B1 (en) 1990-10-05
IT8721200A0 (en) 1987-07-07
SE8703674D0 (en) 1987-09-23
SE8703674L (en) 1989-05-14

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19940630