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FR2586828B1 - INFRARED LENS, WITH VARIABLE FOCAL DISTANCE. - Google Patents

INFRARED LENS, WITH VARIABLE FOCAL DISTANCE.

Info

Publication number
FR2586828B1
FR2586828B1 FR8512872A FR8512872A FR2586828B1 FR 2586828 B1 FR2586828 B1 FR 2586828B1 FR 8512872 A FR8512872 A FR 8512872A FR 8512872 A FR8512872 A FR 8512872A FR 2586828 B1 FR2586828 B1 FR 2586828B1
Authority
FR
France
Prior art keywords
focal distance
variable focal
infrared lens
infrared
lens
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
FR8512872A
Other languages
French (fr)
Other versions
FR2586828A1 (en
Inventor
Andre Masson
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.)
Pierre Angenieux SA
Original Assignee
Pierre Angenieux SA
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 Pierre Angenieux SA filed Critical Pierre Angenieux SA
Priority to FR8512872A priority Critical patent/FR2586828B1/en
Publication of FR2586828A1 publication Critical patent/FR2586828A1/en
Application granted granted Critical
Publication of FR2586828B1 publication Critical patent/FR2586828B1/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
    • G02B13/14—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
    • G02B15/144—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 four groups only
    • G02B15/1441—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 four groups only the first group being positive
    • G02B15/144113—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 four 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)
  • Lens Barrels (AREA)
FR8512872A 1985-08-29 1985-08-29 INFRARED LENS, WITH VARIABLE FOCAL DISTANCE. Expired FR2586828B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8512872A FR2586828B1 (en) 1985-08-29 1985-08-29 INFRARED LENS, WITH VARIABLE FOCAL DISTANCE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8512872A FR2586828B1 (en) 1985-08-29 1985-08-29 INFRARED LENS, WITH VARIABLE FOCAL DISTANCE.

Publications (2)

Publication Number Publication Date
FR2586828A1 FR2586828A1 (en) 1987-03-06
FR2586828B1 true FR2586828B1 (en) 1988-08-12

Family

ID=9322470

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8512872A Expired FR2586828B1 (en) 1985-08-29 1985-08-29 INFRARED LENS, WITH VARIABLE FOCAL DISTANCE.

Country Status (1)

Country Link
FR (1) FR2586828B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8703402D0 (en) * 1987-02-13 1987-04-08 Pilkington Perkin Elmer Ltd Dual magnification infra-red telescope
FR2616231B1 (en) * 1987-06-04 1990-11-16 Trt Telecom Radio Electr VARIABLE FOCAL OPTICAL SYSTEM AND ASSOCIATED ELECTROMECHANICAL CONTROL
DE3924269C2 (en) * 1989-07-22 2001-04-05 Zeiss Carl Fa Drive and control for shifting optical links in an IR pan rate
JPH0387801A (en) * 1989-08-31 1991-04-12 Hirakawa Kogyosha:Kk Temperature compensating device for focus position
CN109491040B (en) * 2018-12-13 2021-03-05 中国航空工业集团公司洛阳电光设备研究所 Continuous zooming control method and system for infrared specific view field

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825315A (en) * 1973-01-29 1974-07-23 R Altman Zoom lens optical system for infrared wavelengths
US3947084A (en) * 1975-02-28 1976-03-30 Hughes Aircraft Company Long-wave infrared afocal zoom telescope
DE2533825C3 (en) * 1975-07-29 1979-02-01 Jos. Schneider & Co, Optische Werke, 6550 Bad Kreuznach Distance setting for lenses with adjustable focal length
GB1559514A (en) * 1976-10-02 1980-01-23 Pilkington Perkin Elmer Ltd Infra-red zoom lenses
ATE12701T1 (en) * 1981-04-21 1985-04-15 Siemens Ag Albis FOCUSING DEVICE.

Also Published As

Publication number Publication date
FR2586828A1 (en) 1987-03-06

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Legal Events

Date Code Title Description
TP Transmission of property