GB1370376A - Vehicles having a rear view optical system - Google Patents

Vehicles having a rear view optical system

Info

Publication number
GB1370376A
GB1370376A GB5185371A GB5185371A GB1370376A GB 1370376 A GB1370376 A GB 1370376A GB 5185371 A GB5185371 A GB 5185371A GB 5185371 A GB5185371 A GB 5185371A GB 1370376 A GB1370376 A GB 1370376A
Authority
GB
United Kingdom
Prior art keywords
lens
prismatic
lenses
sections
caravan
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
GB5185371A
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.)
Roberts C E C
Original Assignee
Roberts C E C
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 to BE791092D priority Critical patent/BE791092A/en
Application filed by Roberts C E C filed Critical Roberts C E C
Priority to GB5185371A priority patent/GB1370376A/en
Priority to NL7214572A priority patent/NL7214572A/xx
Priority to FR7239304A priority patent/FR2160053A5/fr
Publication of GB1370376A publication Critical patent/GB1370376A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/001Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles integrated in the windows, e.g. Fresnel lenses
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Lenses (AREA)

Abstract

1370376 Rear view observation devices C E C ROBERTS 27 July 1972 [8 Nov 1971] 51853/71 Heading B7J In a vehicle which may have its own motive power unit or may be a trailer such as a caravan 6, Fig. 5, an optically-transparent prismatic lens 4 is arranged in, on or near the rear window 5 so that parallel light passing through the lens 4 is diverged but generally deflected downwardly (along path 10) relative to its original direction 9. Thus the driver 7 of a towing car 8 can see the road immediately behind the caravan 6 via his driving mirror and the lens 4. As shown in Figs. 1 and 4, the lens may have one or more prismatic sections 1 and one or more concave sections 2, the surfaces of the prismatic sections 1 being parallel and the surfaces of the concave sections 2 being concentric. The lenses are as planoconcave diverging lenses, of which the focal length may be substantially uniform for a whole lens and be between one and six feet, preferably about three feet, or the focal length of a lens may be greater at its central portion than at its edges. The minimum angle of deflection caused by the lens should not be more than 10 degrees and preferably be about 5 degrees. The lenses are circular and have a respective annular lip 3 by which a lens 1 may be attached in a circular hole in the window 5. A prismatic lens may be formed by two contoured transparent sheets bonded around their edges and containing transparent liquid therebetween.
GB5185371A 1971-11-08 1971-11-08 Vehicles having a rear view optical system Expired GB1370376A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE791092D BE791092A (en) 1971-11-08 PRISMATIC DEVICE
GB5185371A GB1370376A (en) 1971-11-08 1971-11-08 Vehicles having a rear view optical system
NL7214572A NL7214572A (en) 1971-11-08 1972-10-27
FR7239304A FR2160053A5 (en) 1971-11-08 1972-11-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5185371A GB1370376A (en) 1971-11-08 1971-11-08 Vehicles having a rear view optical system

Publications (1)

Publication Number Publication Date
GB1370376A true GB1370376A (en) 1974-10-16

Family

ID=10461644

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5185371A Expired GB1370376A (en) 1971-11-08 1971-11-08 Vehicles having a rear view optical system

Country Status (4)

Country Link
BE (1) BE791092A (en)
FR (1) FR2160053A5 (en)
GB (1) GB1370376A (en)
NL (1) NL7214572A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085479A1 (en) * 1982-01-07 1983-08-10 Leslie F. Dupee Rear viewing system
GB2263453A (en) * 1991-10-31 1993-07-28 Justin Miles Thomas Rear view systems
GB2309319A (en) * 1996-01-17 1997-07-23 David Hopkins Bar prism with concave face for use on vehicle mirrors and windscreens or on spectacles
CN102416905A (en) * 2011-10-21 2012-04-18 杨学斌 Vehicle device for expanding visual field

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085479A1 (en) * 1982-01-07 1983-08-10 Leslie F. Dupee Rear viewing system
GB2263453A (en) * 1991-10-31 1993-07-28 Justin Miles Thomas Rear view systems
GB2263453B (en) * 1991-10-31 1995-08-09 Justin Miles Thomas Improvements in or relating to rear view systems
US5526195A (en) * 1991-10-31 1996-06-11 Optical Perspectives Ltd. Rear-view system for vehicles
GB2309319A (en) * 1996-01-17 1997-07-23 David Hopkins Bar prism with concave face for use on vehicle mirrors and windscreens or on spectacles
CN102416905A (en) * 2011-10-21 2012-04-18 杨学斌 Vehicle device for expanding visual field

Also Published As

Publication number Publication date
FR2160053A5 (en) 1973-06-22
NL7214572A (en) 1973-05-10
BE791092A (en) 1973-03-01

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years