JPH06221960A - Measuring method and device for light source position and optical axis of head light - Google Patents
Measuring method and device for light source position and optical axis of head lightInfo
- Publication number
- JPH06221960A JPH06221960A JP1097493A JP1097493A JPH06221960A JP H06221960 A JPH06221960 A JP H06221960A JP 1097493 A JP1097493 A JP 1097493A JP 1097493 A JP1097493 A JP 1097493A JP H06221960 A JPH06221960 A JP H06221960A
- Authority
- JP
- Japan
- Prior art keywords
- headlight
- light source
- optical axis
- light
- 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.)
- Granted
Links
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車その他の車両用
ヘッドライトの光軸調整に適用される、ヘッドライトの
光源位置測定方法及び光軸測定方法並びにこれらの方法
の実施に用いられる測定装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to the adjustment of the optical axis of headlights for automobiles and other vehicles. Regarding
【０００２】[0002]
【従来の技術】従来、特公平２−９２９８号公報によ
り、ヘッドライトの前方に配置したスクリーンに対する
ヘッドライト光の照射像をＣＣＤカメラで撮像し、画像
処理によって照度の重心座標を計測し、この重心座標を
ヘッドライトの光軸の位置としてこれがスクリーン上の
所定範囲内に位置するようにヘッドライトの光軸調整を
行う方法が知られている。このものでは、ヘッドライト
の光源（フィラメント）が予め定めた設定位置に存する
ものとし、この設定位置と光軸の正規の向きとスクリー
ンまでの距離とに基いて光軸が位置すべきスクリーン上
での合格範囲を予め定めているが、スクリーンに対する
サスペンションの初期なじみ、タイヤのエア圧、組付誤
差等により実際の光源の位置が設定位置からずれてしま
うことがあり、この場合には光軸の向きが正規の向きか
らずれていても光軸が合格範囲に入ってしまい正確な光
軸調整を行い得なくなる。かかる不具合を解決すべく、
特公平２−２５１３２号公報により、スクリーンに対す
るヘッドライト光の照射像を撮像するカメラとは別にヘ
ッドライトを直接撮像するカメラを設けてヘッドライト
の位置を計測し、この位置に基いてスクリーン上での光
軸位置の合格範囲を設定するものも知られているが、ヘ
ッドライトを直接撮像しても光源たるフィラメントの位
置は正確には検出できず、光源の位置ずれに対しての対
策としては不充分であり、更にはスクリーン用とヘッド
ライト用の２台のカメラが必要となり、設備費が高くな
る不具合もある。また、本願出願人の出願に係る特開平
４−１４７０３０号公報により、ヘッドライトの前方
に、前後方向に長手の格子孔をマトリックス状に複数設
けた格子体を配置して、該格子体を透過したヘッドライ
ト光をスクリーンに照射し、各格子孔によりマトリック
ス状に区分されるスクリーン上の各照射区域における各
格子孔の透過光の照射面積と照度とを測定してヘッドラ
イトの光軸を調整する方法も知られている。この方法に
よれば、格子孔のうちその孔軸の延長線がヘッドライト
の光源を通る格子孔に対応する照射区域にはその全面に
亘って光線が照射されて照射面積が最大となり、一方、
ヘッドライトの光軸に合致する格子孔に対応する照射区
域は照度が最大となる。従って、光源の位置ずれを生じ
ても、照射面積が最大となる照射区域から光源の位置を
割出すことができ、この光源の位置と照度が最大となる
照度区域から割出される光軸の位置とに基いて光軸が正
規の向きとなるように光軸調整を行うことができる。2. Description of the Related Art Conventionally, according to Japanese Patent Publication No. 2-9298, a CCD camera captures an irradiation image of headlight light on a screen arranged in front of a headlight, and the barycentric coordinate of illuminance is measured by image processing. There is known a method of adjusting the optical axis of the headlight so that the barycentric coordinate is set as the position of the optical axis of the headlight so as to be located within a predetermined range on the screen. In this case, it is assumed that the light source (filament) of the headlight is present at a preset setting position, and the optical axis should be positioned on the screen based on the setting position, the normal direction of the optical axis, and the distance to the screen. Although the pass range of is set in advance, the actual position of the light source may deviate from the set position due to initial fitting of the suspension to the screen, tire air pressure, assembly error, etc. Even if the orientation deviates from the normal orientation, the optical axis falls within the acceptable range, and accurate optical axis adjustment cannot be performed. In order to solve this problem,
According to Japanese Patent Publication No. 25132/1990, a camera for directly capturing the headlight is provided separately from the camera for capturing the irradiation image of the headlight on the screen, and the position of the headlight is measured. Although it is known to set the pass range of the optical axis position of, the position of the filament as the light source cannot be accurately detected even if the headlight is directly imaged, and as a measure against the positional deviation of the light source, It is not sufficient, and further, two cameras, one for the screen and one for the headlight, are required, and there is a problem that the equipment cost becomes high. Further, according to Japanese Patent Application Laid-Open No. 4-147030 filed by the applicant of the present application, a grid body having a plurality of long grid holes in the front-rear direction arranged in a matrix is arranged in front of the headlight, and the grid body is transmitted. Adjust the optical axis of the headlight by irradiating the screen with the selected headlight light and measuring the irradiation area and the illuminance of the transmitted light of each grid hole in each irradiation area on the screen divided into a matrix by each grid hole. It is also known how to do it. According to this method, the extension area of the hole axis of the grid hole corresponds to the grid hole that passes through the light source of the headlight, and the light beam is irradiated over the entire surface of the irradiation area to maximize the irradiation area.
The illuminance is maximum in the irradiation area corresponding to the grid hole that matches the optical axis of the headlight. Therefore, even if the position of the light source is displaced, the position of the light source can be indexed from the irradiation area where the irradiation area is the maximum, and the position of the light source and the position of the optical axis that is indexed from the illumination area where the illuminance is the maximum. Based on and, the optical axis can be adjusted so that the optical axis is in the regular direction.
【０００３】[0003]
【発明が解決しようとする課題】上記特開平４−１４７
０３０号公報に記載の従来技術は、光源の位置を正確に
測定できるという利点があるが、マトリックス状に区分
された多数の照射区域の夫々について画像処理を行う必
要があって時間がかかり、光軸調整のサイクルタイムが
長くなる不具合がある。本発明は、以上の点に鑑み、ヘ
ッドライトの光源の位置を正確に且つ短時間で測定し得
るようにすることを第１の目的とし、更に、１台の撮像
手段からの画像情報に基いてヘッドライトの光源の位置
と光軸の位置とを測定し得るようにすることを第２の目
的としている。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The conventional technique described in Japanese Patent Publication No. 030 has the advantage that the position of the light source can be accurately measured, but it requires time to perform image processing for each of a large number of irradiation areas divided in a matrix, which requires time and light. There is a problem that the cycle time for axis adjustment becomes long. In view of the above points, the present invention has as its first object to make it possible to measure the position of a light source of a headlight accurately and in a short time, and further, based on image information from one image pickup means. A second object is to be able to measure the position of the light source of the headlight and the position of the optical axis.
【０００４】[0004]
【課題を解決するための手段】上記第１の目的を達成す
べく、本発明の光源位置測定装置は、ヘッドライトの前
方に配置する筒体と、該筒体の互に交差する少なくとも
２つの内壁面におけるヘッドライト光の反射像が視野内
に収まるように設ける撮像手段と、これら反射像に基い
てヘッドライトの光源の位置を割出す、前記撮像手段に
接続される処理手段とを備えることを特徴とする。ま
た、上記第２の目的を達成すべく、本発明の光軸測定装
置は、ヘッドライトの前方に配置する筒体と、該筒体内
に、該筒体の互に交差する少なくとも２つの内壁面に対
するヘッドライト光の入反射を許容する隙間を存して設
けるスクリーンと、前記内壁面におけるヘッドライト光
の反射像と該スクリーンに対するヘッドライト光の照射
像とが視野内に収まるように設ける撮像手段と、前記反
射像に基いてヘッドライトの光源の位置を割出すと共に
前記照射像に基いてヘッドライトの光軸の位置を割出
す、前記撮像手段に接続される処理手段とを備えること
を特徴とする。In order to achieve the first object, the light source position measuring device of the present invention comprises a cylindrical body arranged in front of the headlight and at least two cylindrical bodies intersecting each other. Image pickup means provided so that the reflected image of the headlight light on the inner wall surface falls within the field of view, and processing means connected to the image pickup means for indexing the position of the light source of the headlight based on these reflected images Is characterized by. In order to achieve the second object, the optical axis measuring device of the present invention is provided with a tubular body arranged in front of the headlight and at least two inner wall surfaces of the tubular body that intersect with each other. A screen provided with a gap that allows the entrance and reflection of the headlight light with respect to the screen, and an imaging means provided so that the reflected image of the headlight light on the inner wall surface and the irradiation image of the headlight light on the screen fall within the visual field. And a processing unit connected to the image pickup unit for indexing the position of the light source of the headlight based on the reflected image and indexing the position of the optical axis of the headlight based on the irradiation image. And
【０００５】[0005]
【作用】本発明の作用を上記光軸測定装置に基いて説明
する。撮像手段で撮像される筒体内壁面におけるヘッド
ライト光の反射像は、撮像手段のレンズとヘッドライト
の光源との結線を含む筒体内壁面に直角な面上で筒体内
壁面に対し入反射した光線の像となり、筒体内壁面の筒
体軸線に直交する面方向を幅方向として、光源が筒体内
壁面の幅方向に変位すれば撮像される反射像の位置も該
内壁面の幅方向に変位する。従って、筒体の互に交差す
る少なくとも２つの内壁面における反射像の位置から光
源の位置を幾向学的に割出すことができる。そして、上
記従来技術のように多数の照射区域の夫々について画像
処理を施す必要がないため、処理時間が短くなる。ま
た、撮像手段によって撮像されるスクリーンに対するヘ
ッドライト光の照射像の画像情報に基いて該照射像の照
度重心を求める等の公知の方法でヘッドライトの光軸の
位置を割出すことができ、かくて１台の撮像手段を用い
るだけで光源と光軸の位置を測定できる。The operation of the present invention will be described based on the above optical axis measuring device. The reflected image of the headlight light on the inner wall surface of the cylinder imaged by the image pickup means is a light beam which is reflected on the inner wall surface of the cylinder on a plane perpendicular to the inner wall surface of the cylinder including the connection between the lens of the image pickup means and the light source of the headlight. When the light source is displaced in the width direction of the inner wall surface of the cylinder, the position of the reflected image to be imaged is also displaced in the width direction of the inner wall surface. . Therefore, the position of the light source can be indexed from the positions of the reflection images on at least two inner wall surfaces of the cylindrical body intersecting each other. Since it is not necessary to perform image processing on each of a large number of irradiation areas as in the above-mentioned conventional technique, the processing time is shortened. Further, the position of the optical axis of the headlight can be determined by a known method such as obtaining the illuminance gravity center of the irradiation image based on the image information of the irradiation image of the headlight light on the screen imaged by the imaging means, Thus, the position of the light source and the optical axis can be measured by using only one image pickup means.
【０００６】[0006]
【実施例】図１を参照して、１は定位置に停止させる自
動車ａのヘッドライトｂの前方の２．５ｍ程度の近距離
に配置した筒体を示し、該筒体１内にすりガラス等から
成る半透明のスクリーン２を設けると共に、スクリーン
２の前方（ヘッドライトＢと逆側）に撮像手段たるＣＣ
Ｄカメラ３を対設し、該カメラ３からの画像信号を画像
処理回路を内蔵するコンピュータ４に入力し、ヘッドラ
イトｂの上下方向と左右方向の向きを調整する１対の工
具５、５を有するサーボドライバーユニット６を該コン
ピュータ４により制御して、ヘッドライトｂの光軸調整
を行うようにした。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, reference numeral 1 denotes a cylinder arranged at a short distance of about 2.5 m in front of a headlight b of an automobile a to be stopped at a fixed position. Is provided with a semi-transparent screen 2, and a CC as an imaging means is provided in front of the screen 2 (on the side opposite to the headlight B).
A D camera 3 is provided in a pair, an image signal from the camera 3 is input to a computer 4 having an image processing circuit built therein, and a pair of tools 5 and 5 for adjusting the vertical direction and the horizontal direction of the headlight b are installed. The servo driver unit 6 included therein is controlled by the computer 4 so that the optical axis of the headlight b is adjusted.
【０００７】筒体１は四角形筒で構成されており、前記
スクリーン２を、図２に示す如く、筒体１の左右両側の
縦内壁面１０と下側の横内壁面１１との間に隙間を存し
て配置し、ヘッドライトｂからの光線の一部がこの隙間
を通して該各内壁面１０、１１で入反射されてカメラ３
のレンズ３ａに到達するようにした。尚、該各内壁面１
０、１１には、スクリーン２と同一の前後方向位置で反
射したヘッドライト光がカメラ３のレンズ３ａに到達す
るように、図３に示す如く前後方向の傾斜が付けてあ
り、また、スクリーン２で散乱した光線が内壁面１０、
１１で反射されてカメラ３のレンズ３ａに到達すること
のないように、スクリーン２の前面側（カメラ３側の
面）に遮光筒７を設けた。As shown in FIG. 2, the cylindrical body 1 is formed of a quadrangular cylinder, and a gap is formed between the vertical inner wall surfaces 10 on the left and right sides of the cylindrical body 1 and the lower horizontal inner wall surface 11 of the screen body 1 as shown in FIG. A portion of the light beam from the headlight b is reflected and reflected by the inner wall surfaces 10 and 11 through this gap.
To reach the lens 3a. Incidentally, each inner wall surface 1
Nos. 0 and 11 are inclined in the front-rear direction as shown in FIG. 3 so that the headlight light reflected at the same front-rear position as the screen 2 reaches the lens 3a of the camera 3. Rays scattered by the inner wall surface 10,
A light-shielding tube 7 is provided on the front side of the screen 2 (the surface on the side of the camera 3) so that the light is not reflected by 11 and reaches the lens 3a of the camera 3.
【０００８】以上の構成により、カメラ３の画面には、
図４に示す如く、スクリーン２に対するヘッドライト光
の照射像Ａと、縦内壁面１０と横内壁面１１とにおける
ヘッドライト光の反射像Ｂ、Ｃとが結像され、スクリー
ン２上の照射像Ａをコンピュータ４で画像処理して、ヘ
ッドライトｂの光軸のスクリーン２上の位置Ｏ1を割出
す。光軸位置の割出し方はヘッドライトｂの機種によっ
て異なるもので、その具体的な方法は特開昭６１−１７
９３４号公報や特公平２−２５１３２号公報等で公知で
あり、その詳細な説明は省略する。With the above configuration, the screen of the camera 3 is
As shown in FIG. 4, the irradiation image A of the headlight light on the screen 2 and the reflection images B and C of the headlight light on the vertical inner wall surface 10 and the horizontal inner wall surface 11 are formed, and the irradiation image A on the screen 2 is formed. Is subjected to image processing by the computer 4, and the position O 1 of the optical axis of the headlight b on the screen 2 is determined. The method of indexing the optical axis differs depending on the model of the headlight b, and the specific method is disclosed in Japanese Patent Laid-Open No. 61-17.
It is known in Japanese Patent Publication No. 934, Japanese Patent Publication No. 2-25132, etc., and detailed description thereof will be omitted.
【０００９】また、各反射像Ｂ、Ｃとして結像されるの
は、図３に示す如く、カメラ３のレンズ３ａとヘッドラ
イトｂの光源（フィラメント）との結線Ｌを含む各内壁
面１０、１１に垂直な面上で該各内壁面１０、１１に対
し入反射される光線Ｂ′、Ｃ′であり、光源が上下方向
に変位すると縦内壁面１０における反射像Ｂが所定の比
率で上下方向に変位し、同様に光源が左右方向に変位す
ると横内壁面１１における反射像Ｃが所定の比率で左右
方向に変位する。かくて、縦内壁面１０における反射像
Ｂの位置から光源のスクリーン２上の上下方向位置と、
横内壁面１１における反射像Ｃの位置から光源のスクリ
ーン２上の左右方向位置とを割出すことができる。尚、
各反射像Ｂ、Ｃは縦内壁面１０では上下方向、横内壁面
１１では左右方向に間延びした像になるが、各反射像
Ｂ、Ｃを画像処理して該各反射像Ｂ、Ｃの最高照度点Ｂ
Ｏ、ＣＯを求めることにより各反射像Ｂ、Ｃの位置を特
定でき、ＢＯを通る水平線とＣＯを通る鉛直線との交点
として光源の位置Ｏ2を正確に割出すことができる。As shown in FIG. 3, the reflected images B and C are formed on the inner wall surfaces 10 including the connection L between the lens 3a of the camera 3 and the light source (filament) of the headlight b. Rays B'and C'which are reflected and reflected on the inner wall surfaces 10 and 11 on a plane perpendicular to 11, and when the light source is displaced in the vertical direction, the reflection image B on the vertical inner wall surface 10 rises and falls at a predetermined ratio. When the light source is similarly displaced in the left-right direction, the reflection image C on the lateral inner wall surface 11 is displaced in the left-right direction at a predetermined ratio. Thus, from the position of the reflected image B on the vertical inner wall surface 10 to the vertical position of the light source on the screen 2,
The horizontal position of the light source on the screen 2 can be determined from the position of the reflected image C on the lateral inner wall surface 11. still,
The reflected images B and C are images that extend vertically in the vertical inner wall surface 10 and in the horizontal direction in the horizontal inner wall surface 11. The reflected images B and C are image-processed and the maximum illuminance of the reflected images B and C is increased. Point B
By obtaining O and CO, the positions of the reflected images B and C can be specified, and the light source position O 2 can be accurately determined as the intersection of the horizontal line passing through BO and the vertical line passing through CO.
【００１０】そして、割出された光軸位置Ｏ1と光源位
置Ｏ2とを比較し、光源位置Ｏ2に基いて定められる所定
範囲に光軸が位置しているか否かを判定し、光軸が所定
範囲からずれているときは、そのずれ量に応じてサーボ
ドライバーユニット６を駆動し、光軸調整を行う。尚、
本実施例においては、光軸位置Ｏ1と光源位置Ｏ2との比
較判定作業をコンピュータ４で自動的に行うようにした
が、ＣＲＴ等の表示装置に両位置Ｏ1、Ｏ2を表示し、作
業者が表示装置を見て判定し、手動で光軸調整を行うよ
うにしても良い。[0010] Then, by comparing the indexed optical axis position O 1 and the light source position O 2, to determine whether the optical axis is positioned in a predetermined range defined on the basis of the light source position O 2, light When the axis is deviated from the predetermined range, the servo driver unit 6 is driven according to the amount of deviation to adjust the optical axis. still,
In this embodiment, the computer 4 automatically performs the comparison / judgment work between the optical axis position O 1 and the light source position O 2 , but both positions O 1 and O 2 are displayed on the display device such as a CRT. Alternatively, an operator may make a judgment by looking at the display device and manually perform the optical axis adjustment.
【００１１】また、上記実施例では、筒体１を四角形筒
とし、左右両側の縦内壁面１０、１０と下側の横内壁面
１１とにおける計３箇所の反射像Ｂ、Ｂ、Ｃを撮像し、
左右両側の反射像Ｂ、Ｂの位置の平均値として光源の上
下方向位置を割出すようにしたが、片側の反射像Ｂは省
略しても良い。また、筒体１は四角形筒に限られるもの
ではなく、例えば３角形筒として互に交差する２つの内
壁面における反射像を撮像し、各反射像の最高照度点を
通る各内壁面の法線の交点から光源の位置を割出すこと
もできる。Further, in the above embodiment, the cylindrical body 1 is a quadrangular cylinder, and the reflection images B, B, C at three positions on the vertical inner wall surfaces 10 and 10 on the left and right sides and the lower horizontal inner wall surface 11 are imaged. ,
Although the vertical position of the light source is indexed as the average value of the positions of the reflection images B on both the left and right sides, the reflection image B on one side may be omitted. Further, the cylindrical body 1 is not limited to a quadrangular cylinder, and for example, as a triangular cylinder, a reflection image on two inner wall surfaces intersecting with each other is taken, and a normal line of each inner wall surface passing through the highest illuminance point of each reflection image. It is also possible to determine the position of the light source from the intersection of.
【００１２】[0012]
【発明の効果】以上の説明から明らかなように、請求項
１、２の発明によれば、ヘッドライトの光源の位置を短
時間で正確に測定することができ、更に、請求項３乃至
５の発明によれば、１台の撮像手段で光源の位置と光軸
の位置とを測定できて設備費が安価になると共に、測定
に要する時間も短くなり、ヘッドライトの光軸調整を実
際の光源の位置に合わせて能率良く正確に行い得られる
効果を有する。As is apparent from the above description, according to the inventions of claims 1 and 2, it is possible to accurately measure the position of the light source of the headlight in a short time. According to the invention of claim 1, the position of the light source and the position of the optical axis can be measured by one imaging means, the facility cost is low, the time required for the measurement is short, and the optical axis adjustment of the headlight is practical. It has the effect that it can be performed efficiently and accurately according to the position of the light source.
【図１】 本発明の光軸測定装置の一例の概略側面図FIG. 1 is a schematic side view of an example of an optical axis measuring device of the present invention.
【図２】 図１のII-II線截断面図FIG. 2 is a sectional view taken along the line II-II of FIG.
【図３】 筒体内壁面でのヘッドライト光の反射形態を
示す斜視図FIG. 3 is a perspective view showing how the headlight light is reflected on the inner wall surface of the cylinder.
【図４】 撮像手段による画像を示す図FIG. 4 is a diagram showing an image by an image pickup means.
１ 筒体 １０、１１ 内壁面 ２ スクリーン ３ カメラ（撮像手
段） ４ コンピュータ（処理手段、判定手段） Ａ 照射像 Ｂ、Ｃ 反射像 ｂ ヘッドライトDESCRIPTION OF SYMBOLS 1 Cylindrical body 10, 11 Inner wall surface 2 Screen 3 Camera (imaging means) 4 Computer (processing means, determination means) A Irradiation image B, C Reflection image b Headlight
Claims (5)
筒体の互に交差する少なくとも２つの内壁面におけるヘ
ッドライト光の反射像を撮像し、これら反射像に基いて
ヘッドライトの光源の位置を割出すことを特徴とするヘ
ッドライトの光源位置測定方法。1. A cylindrical body is arranged in front of a headlight, and a reflected image of headlight light is taken on at least two inner wall surfaces of the cylindrical body intersecting each other. Based on these reflected images, a light source of the headlight. A method for measuring the position of a light source of a headlight, which comprises:
該筒体の互に交差する少なくとも２つの内壁面における
ヘッドライト光の反射像が視野内に収まるように設ける
撮像手段と、これら反射像に基いてヘッドライトの光源
の位置を割出す、前記撮像手段に接続される処理手段と
を備えることを特徴とするヘッドライトの光源位置測定
装置。2. A cylindrical body arranged in front of the headlight,
Image pickup means provided so that reflected images of the headlight light on at least two inner wall surfaces of the cylindrical bodies intersecting with each other fall within the field of view, and the position of the light source of the headlight is determined based on these reflected images. A light source position measuring device for a headlight, comprising: a processing means connected to the means.
光源の位置を割出すと共に、前記筒体内に設けたスクリ
ーンに対するヘッドライト光の照射像を撮像し、この照
射像に基いてヘッドライトの光軸の位置を割出し、光源
の位置に基いて定められる所定範囲に光軸が位置してい
るか否かを判定することを特徴とするヘッドライトの光
軸測定方法。3. The position of the light source of the headlight is indexed by the method according to claim 1, an irradiation image of headlight light is taken on a screen provided in the cylinder, and the headlight is based on the irradiation image. The method for measuring an optical axis of a headlight, wherein the position of the optical axis of the headlight is indexed, and it is determined whether or not the optical axis is located within a predetermined range determined based on the position of the light source.
該筒体内に、該筒体の互に交差する少なくとも２つの内
壁面に対するヘッドライト光の入反射を許容する隙間を
存して設けるスクリーンと、前記内壁面におけるヘッド
ライト光の反射像と該スクリーンに対するヘッドライト
光の照射像とが視野内に収まるように設ける撮像手段
と、前記反射像に基いてヘッドライトの光源の位置を割
出すと共に前記照射像に基いてヘッドライトの光軸の位
置を割出す、前記撮像手段に接続される処理手段とを備
えることを特徴とするヘッドライトの光軸測定装置。4. A cylindrical body arranged in front of the headlight,
A screen provided in the cylinder with a gap allowing at least two inner wall surfaces of the cylinder intersecting and reflecting headlight light, a reflection image of the headlight light on the inner wall surface, and the screen. An image pickup means provided so that the irradiation image of the headlight light with respect to the field of view is located within the field of view, and the position of the light source of the headlight is indexed based on the reflection image and the position of the optical axis of the headlight is determined based on the irradiation image. An optical axis measuring device for a headlight, comprising: processing means connected to the image pickup means for indexing.
に光軸が位置しているか否かを判定する判定手段を備え
ることを特徴とする請求項４に記載のヘッドライトの光
軸測定装置。5. The optical axis measuring device for a headlight according to claim 4, further comprising a determining means for determining whether or not the optical axis is positioned within a predetermined range determined based on the position of the light source. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1097493A JP2881671B2 (en) | 1993-01-26 | 1993-01-26 | Headlight light source position measuring method, optical axis measuring method, and measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1097493A JP2881671B2 (en) | 1993-01-26 | 1993-01-26 | Headlight light source position measuring method, optical axis measuring method, and measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06221960A true JPH06221960A (en) | 1994-08-12 |
| JP2881671B2 JP2881671B2 (en) | 1999-04-12 |
Family
ID=11765135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1097493A Expired - Fee Related JP2881671B2 (en) | 1993-01-26 | 1993-01-26 | Headlight light source position measuring method, optical axis measuring method, and measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2881671B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008151733A (en) * | 2006-12-20 | 2008-07-03 | Altia Co Ltd | Method for measuring for headlight tester and headlight tester |
| WO2014192347A1 (en) * | 2013-05-31 | 2014-12-04 | 本田技研工業株式会社 | Optical sensor inspection system and optical sensor inspection method |
-
1993
- 1993-01-26 JP JP1097493A patent/JP2881671B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008151733A (en) * | 2006-12-20 | 2008-07-03 | Altia Co Ltd | Method for measuring for headlight tester and headlight tester |
| WO2014192347A1 (en) * | 2013-05-31 | 2014-12-04 | 本田技研工業株式会社 | Optical sensor inspection system and optical sensor inspection method |
| JP5897213B2 (en) * | 2013-05-31 | 2016-03-30 | 本田技研工業株式会社 | Optical sensor inspection system and optical sensor inspection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2881671B2 (en) | 1999-04-12 |
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