GB2159297B - Infrared afocal refractor telescope - Google Patents

Infrared afocal refractor telescope

Info

Publication number
GB2159297B
GB2159297B GB08511668A GB8511668A GB2159297B GB 2159297 B GB2159297 B GB 2159297B GB 08511668 A GB08511668 A GB 08511668A GB 8511668 A GB8511668 A GB 8511668A GB 2159297 B GB2159297 B GB 2159297B
Authority
GB
United Kingdom
Prior art keywords
infrared
refractor telescope
telescope
infrared afocal
afocal refractor
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
GB08511668A
Other versions
GB2159297A (en
GB8511668D0 (en
Inventor
Iain Alexander Neil
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.)
Bar & Stroud Ltd
Original Assignee
Bar & Stroud 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 Bar & Stroud Ltd filed Critical Bar & Stroud Ltd
Priority to GB08511668A priority Critical patent/GB2159297B/en
Publication of GB8511668D0 publication Critical patent/GB8511668D0/en
Publication of GB2159297A publication Critical patent/GB2159297A/en
Application granted granted Critical
Publication of GB2159297B publication Critical patent/GB2159297B/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
    • G02B13/22—Telecentric objectives or lens systems
    • 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
    • G02B15/143101—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 +--
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Telescopes (AREA)
  • Lenses (AREA)
GB08511668A 1984-05-22 1985-05-09 Infrared afocal refractor telescope Expired GB2159297B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08511668A GB2159297B (en) 1984-05-22 1985-05-09 Infrared afocal refractor telescope

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8413096 1984-05-22
GB08511668A GB2159297B (en) 1984-05-22 1985-05-09 Infrared afocal refractor telescope

Publications (3)

Publication Number Publication Date
GB8511668D0 GB8511668D0 (en) 1985-07-10
GB2159297A GB2159297A (en) 1985-11-27
GB2159297B true GB2159297B (en) 1987-06-17

Family

ID=26287772

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08511668A Expired GB2159297B (en) 1984-05-22 1985-05-09 Infrared afocal refractor telescope

Country Status (1)

Country Link
GB (1) GB2159297B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL89301A (en) * 1989-02-15 1993-04-04 Electro Optics Ind Ltd Zoom system
DE102009045970B4 (en) * 2009-10-23 2020-09-17 Carl Zeiss Optronics Gmbh Thermal imaging device

Family Cites Families (1)

* 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

Also Published As

Publication number Publication date
GB2159297A (en) 1985-11-27
GB8511668D0 (en) 1985-07-10

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Legal Events

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

Effective date: 20000508