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GB2126370B - Infra-red objective zoom lenses - Google Patents

Infra-red objective zoom lenses

Info

Publication number
GB2126370B
GB2126370B GB08321790A GB8321790A GB2126370B GB 2126370 B GB2126370 B GB 2126370B GB 08321790 A GB08321790 A GB 08321790A GB 8321790 A GB8321790 A GB 8321790A GB 2126370 B GB2126370 B GB 2126370B
Authority
GB
United Kingdom
Prior art keywords
infra
zoom lenses
objective zoom
red
red objective
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
GB08321790A
Other versions
GB2126370A (en
GB8321790D0 (en
Inventor
Michael Roberts
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.)
Qioptiq Ltd
Original Assignee
Pilkington PE 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 Pilkington PE Ltd filed Critical Pilkington PE Ltd
Priority to GB08321790A priority Critical patent/GB2126370B/en
Publication of GB8321790D0 publication Critical patent/GB8321790D0/en
Publication of GB2126370A publication Critical patent/GB2126370A/en
Application granted granted Critical
Publication of GB2126370B publication Critical patent/GB2126370B/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)
  • Lenses (AREA)
GB08321790A 1982-09-04 1983-08-12 Infra-red objective zoom lenses Expired GB2126370B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08321790A GB2126370B (en) 1982-09-04 1983-08-12 Infra-red objective zoom lenses

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8225277 1982-09-04
GB8310281 1983-04-18
GB08321790A GB2126370B (en) 1982-09-04 1983-08-12 Infra-red objective zoom lenses

Publications (3)

Publication Number Publication Date
GB8321790D0 GB8321790D0 (en) 1983-10-05
GB2126370A GB2126370A (en) 1984-03-21
GB2126370B true GB2126370B (en) 1986-03-05

Family

ID=27261726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08321790A Expired GB2126370B (en) 1982-09-04 1983-08-12 Infra-red objective zoom lenses

Country Status (1)

Country Link
GB (1) GB2126370B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138591B (en) * 1983-04-16 1986-05-08 Barr & Stroud Ltd Infrared objective zoom lens assembly
US4659171A (en) * 1984-05-22 1987-04-21 Barr & Stroud Limited Infrared afocal refractor telescope
DE3625128A1 (en) * 1986-07-25 1988-02-04 Zeiss Carl Fa VARIO LENS FOR INFRARED
GB8703402D0 (en) * 1987-02-13 1987-04-08 Pilkington Perkin Elmer Ltd Dual magnification infra-red telescope
IL89301A (en) * 1989-02-15 1993-04-04 Electro Optics Ind Ltd Zoom system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947084A (en) * 1975-02-28 1976-03-30 Hughes Aircraft Company Long-wave infrared afocal zoom telescope

Also Published As

Publication number Publication date
GB2126370A (en) 1984-03-21
GB8321790D0 (en) 1983-10-05

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Legal Events

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

Effective date: 20000812