GB1320592A - Location of an edge of a light beam - Google Patents
Location of an edge of a light beamInfo
- 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
Links
- 241001269524 Dura Species 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 abstract 1
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.
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)
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)
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 |
-
1970
- 1970-10-06 US US00078367A patent/US3746449A/en not_active Expired - Lifetime
-
1971
- 1971-09-28 GB GB4512371A patent/GB1320592A/en not_active Expired
- 1971-09-29 CA CA124,015A patent/CA949743A/en not_active Expired
- 1971-10-05 FR FR7135886A patent/FR2109957A5/fr not_active Expired
- 1971-10-06 DE DE2149870A patent/DE2149870C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2149870C3 (en) | 1975-05-22 |
US3746449A (en) | 1973-07-17 |
DE2149870B2 (en) | 1974-10-10 |
DE2149870A1 (en) | 1972-04-13 |
CA949743A (en) | 1974-06-25 |
FR2109957A5 (en) | 1972-05-26 |
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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 |