GB978512A - Improvements in or relating to optical image-forming devices - Google Patents

Improvements in or relating to optical image-forming devices

Info

Publication number
GB978512A
GB978512A GB223362A GB223362A GB978512A GB 978512 A GB978512 A GB 978512A GB 223362 A GB223362 A GB 223362A GB 223362 A GB223362 A GB 223362A GB 978512 A GB978512 A GB 978512A
Authority
GB
United Kingdom
Prior art keywords
objective
lenses
angle
relating
optical image
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
GB223362A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB978512A publication Critical patent/GB978512A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

978, 512. Wide angle abutments. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Jan. 22, 1962 [Jan. 25, 1961], No. 2233/62. Heading G2J. To increase the angle of field of an objective L0, three or more afocal systems, each consisting of a positive lens L4, L6, L8 ... and a negative lens L3, Ls, L7 ..., are disposed as the long conjugate side of the objective L0 with their axes parallel to the optical axis of the objective. The positive lenses may be integral as also may the negative lenses, the two lens units being mounted in a casing. This casing 18 may be pivoted to the objective end of a telescope 15 so that it may be moved into the light path when it is desired to increase the field of view. The lenses of each afocal system may be cylindrical so that the angle of view is increased in one direction only.
GB223362A 1961-01-25 1962-01-22 Improvements in or relating to optical image-forming devices Expired GB978512A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR850680A FR1286798A (en) 1961-01-25 1961-01-25 Optical device for increasing the field of a telescope

Publications (1)

Publication Number Publication Date
GB978512A true GB978512A (en) 1964-12-23

Family

ID=8747416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB223362A Expired GB978512A (en) 1961-01-25 1962-01-22 Improvements in or relating to optical image-forming devices

Country Status (4)

Country Link
AT (1) AT238962B (en)
DE (1) DE1917066U (en)
FR (1) FR1286798A (en)
GB (1) GB978512A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130038A1 (en) * 1970-06-29 1973-01-04 Pusch Guenter Dipl Ing Dr Ing PROCEDURE FOR MONITORING AIRSPACE FOR INFRARED AND LASER RAYS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130038A1 (en) * 1970-06-29 1973-01-04 Pusch Guenter Dipl Ing Dr Ing PROCEDURE FOR MONITORING AIRSPACE FOR INFRARED AND LASER RAYS

Also Published As

Publication number Publication date
FR1286798A (en) 1962-03-09
DE1917066U (en) 1965-06-03
AT238962B (en) 1965-03-10

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