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GB1388723A - Wide-angle lens - Google Patents

Wide-angle lens

Info

Publication number
GB1388723A
GB1388723A GB2111072A GB2111072A GB1388723A GB 1388723 A GB1388723 A GB 1388723A GB 2111072 A GB2111072 A GB 2111072A GB 2111072 A GB2111072 A GB 2111072A GB 1388723 A GB1388723 A GB 1388723A
Authority
GB
United Kingdom
Prior art keywords
wide
angle lens
lens
degrees
angle
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
GB2111072A
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.)
TUBIX SA
Original Assignee
TUBIX 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
Priority claimed from FR717116725A external-priority patent/FR2136927B1/fr
Priority claimed from FR7214575A external-priority patent/FR2186662B1/fr
Application filed by TUBIX SA filed Critical TUBIX SA
Publication of GB1388723A publication Critical patent/GB1388723A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/0008—Apparatus for testing the eyes; Instruments for examining the eyes provided with illuminating means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • A61B3/12—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes
    • A61B3/125—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for looking at the eye fundus, e.g. ophthalmoscopes with contact lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2423—Optical details of the distal end
    • G02B23/243—Objectives for endoscopes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/24—Instruments or systems for viewing the inside of hollow bodies, e.g. fibrescopes
    • G02B23/2407—Optical details
    • G02B23/2461—Illumination
    • G02B23/2469—Illumination using optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G02B6/06—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Astronomy & Astrophysics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Biophysics (AREA)
  • Lenses (AREA)

Abstract

1388723 Wide-angle lens SATUBIX 5 May 1972 [7 May 1971 25 April 1972] 21110/72 Heading G2J A wide-angle lens is provided with a diaphragm D on the object side of the lens and has an angular field of at least 80 degrees, preferably 120 degrees and an aperture of at least f/3.5 and preferably f/2.5 to f/0.8. The lens may comprise four elements of which the middle two are aspheric and of moulded plastics. Optical data is given for one example only.
GB2111072A 1971-05-07 1972-05-05 Wide-angle lens Expired GB1388723A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR717116725A FR2136927B1 (en) 1971-05-07 1971-05-07
FR7214575A FR2186662B1 (en) 1972-04-25 1972-04-25

Publications (1)

Publication Number Publication Date
GB1388723A true GB1388723A (en) 1975-03-26

Family

ID=26216384

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2111072A Expired GB1388723A (en) 1971-05-07 1972-05-05 Wide-angle lens

Country Status (2)

Country Link
CA (1) CA961680A (en)
GB (1) GB1388723A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916055A1 (en) * 1978-04-21 1979-10-31 Canon Kk Inverted telephoto wide angle lens - has first divergent lens group and second convergent lens group in succession from object side
GB2141556A (en) * 1983-06-14 1984-12-19 Pilkington Perkin Elmer Ltd Glass and plastics objective lens for low light level viewing apparatus
FR2845488A1 (en) * 2002-10-08 2004-04-09 Trophos Cytometer has an optical device with an array of four lenses, plano-convex, divergent meniscus, plano-concave and bi-convex, that broadens the field of view of the device so that whole cells can be observed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916055A1 (en) * 1978-04-21 1979-10-31 Canon Kk Inverted telephoto wide angle lens - has first divergent lens group and second convergent lens group in succession from object side
GB2141556A (en) * 1983-06-14 1984-12-19 Pilkington Perkin Elmer Ltd Glass and plastics objective lens for low light level viewing apparatus
FR2845488A1 (en) * 2002-10-08 2004-04-09 Trophos Cytometer has an optical device with an array of four lenses, plano-convex, divergent meniscus, plano-concave and bi-convex, that broadens the field of view of the device so that whole cells can be observed
WO2004034122A3 (en) * 2002-10-08 2004-05-27 Trophos Optical device for observing samples on a support, designed in particular for a cytometer

Also Published As

Publication number Publication date
CA961680A (en) 1975-01-28

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Legal Events

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