GB1320592A - Location of an edge of a light beam - Google Patents

Location of an edge of a light beam

Info

Publication number
GB1320592A
GB1320592A GB4512371A GB4512371A GB1320592A GB 1320592 A GB1320592 A GB 1320592A GB 4512371 A GB4512371 A GB 4512371A GB 4512371 A GB4512371 A GB 4512371A GB 1320592 A GB1320592 A GB 1320592A
Authority
GB
United Kingdom
Prior art keywords
headlamp
photo
alignment
meters
cells
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
GB4512371A
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.)
Dura Corp
Original Assignee
Dura Corp
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 Dura Corp filed Critical Dura Corp
Publication of GB1320592A publication Critical patent/GB1320592A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • G01M11/06—Testing the alignment of vehicle headlight devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1320592 Testing light beam alignment DURA CORP 28 Sept 1971 16 Oct 1970] 45123/71 Heading G1A A system for monitoring the position of an edge 12 of a light spot 13 includes at least two photo-cells 17, 18 whose outputs are subtracted one from another, the resultant signal being displayed on a meter 23. In testing the alignment of a car head lamp, the car is positioned a standard distance from a board 10 marked with lines 11 and 14 which represent the upper and left positions of the high intensity zone of a correctly aligned headlamp. Photo-cell pairs 17, 18 and 19, 20 are arranged straddling the two lines. An operator adjusts the headlamp position until the two meters each provide a maximum reading, indicating that the headlamp alignment is correct. Alternatively, the two photo-cell pairs are arranged on brackets and are moved until the meters each give a maximum reading. The amount of movement indicates the amount of misalignment of the headlamp. A converging lens may be arranged between the headlamp and the board 10. The photo-cells may be located on the back surface of the screen, which is then either provided with suitable apertures (51-54), Fig. 4 (not shown) or made of translucent material.
GB4512371A 1970-10-06 1971-09-28 Location of an edge of a light beam Expired GB1320592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7836770A 1970-10-06 1970-10-06

Publications (1)

Publication Number Publication Date
GB1320592A true GB1320592A (en) 1973-06-13

Family

ID=22143602

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4512371A Expired GB1320592A (en) 1970-10-06 1971-09-28 Location of an edge of a light beam

Country Status (5)

Country Link
US (1) US3746449A (en)
CA (1) CA949743A (en)
DE (1) DE2149870C3 (en)
FR (1) FR2109957A5 (en)
GB (1) GB1320592A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2306443A1 (en) * 1975-04-01 1976-10-29 Cibie Projecteurs PHOTOELECTRIC DETERMINATION OF THE CUT OF A MOTOR VEHICLE LIGHT BEAM
US4679935A (en) * 1983-10-28 1987-07-14 Honda Giken Kogyo Kabushikikaisha Light distribution of headlight beam
EP0185800A1 (en) * 1984-12-28 1986-07-02 Anzen Motor Car Co., Ltd. Apparatus for determining the irradiation direction of a headlight beam
FR2580399B1 (en) * 1985-04-15 1988-06-24 Automatisme Reglage Optique METHOD AND DEVICE FOR FACILITATING THE LATERAL ANGLE ADJUSTMENT OF A VEHICLE LIGHT PROJECTOR
US4712914A (en) * 1986-01-10 1987-12-15 Westinghouse Electric Corp. Device for characterizing wide angle beams
JPH0663911B2 (en) * 1988-07-29 1994-08-22 マツダ株式会社 Headlight optical axis adjustment method
US5164785A (en) * 1991-02-08 1992-11-17 Hopkins Manufacturing Corporation Headlight aiming apparatus and display
US5331393A (en) * 1992-12-11 1994-07-19 Hopkins Manufacturing Corporation Method and apparatus for locating a specific location on a vehicle headlamp
US5485265A (en) * 1994-09-02 1996-01-16 Hopkins Manufacturing Corporation Vehicle headlight aiming apparatus
US7876427B1 (en) 2009-01-17 2011-01-25 Stephen Waller Melvin Headlamp alignment detection using a network of independent sensor units
US8125628B1 (en) 2009-01-17 2012-02-28 Lones Joe J Light baffling apparatus for headlamp sensor
US8422004B1 (en) 2011-12-08 2013-04-16 Ford Global Technologies, Llc Automotive headlamp aiming insensitive to intensity variations
US10408706B2 (en) * 2017-06-30 2019-09-10 GM Global Technology Operations LLC Method and apparatus for aiming a vehicle lamp

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643117A (en) * 1949-08-29 1953-06-23 Electric Eye Equipment Company Automatic control system
US2714327A (en) * 1950-06-03 1955-08-02 Weaver Mfg Co Photoelectric cell circuit
US3077139A (en) * 1958-05-09 1963-02-12 Gen Motors Corp Apparatus for aiming headlamps
US3532432A (en) * 1968-08-01 1970-10-06 Ford Motor Co Headlamp aiming apparatus and method

Also Published As

Publication number Publication date
DE2149870B2 (en) 1974-10-10
US3746449A (en) 1973-07-17
DE2149870A1 (en) 1972-04-13
FR2109957A5 (en) 1972-05-26
CA949743A (en) 1974-06-25
DE2149870C3 (en) 1975-05-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees