JPS61289785A - Dot light source position detector - Google Patents
Dot light source position detectorInfo
- Publication number
- JPS61289785A JPS61289785A JP13087885A JP13087885A JPS61289785A JP S61289785 A JPS61289785 A JP S61289785A JP 13087885 A JP13087885 A JP 13087885A JP 13087885 A JP13087885 A JP 13087885A JP S61289785 A JPS61289785 A JP S61289785A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- image
- point light
- position detection
- shaped
- 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.)
- Pending
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- Closed-Circuit Television Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はLED (発光ダイオード)又はハロゲンラン
プ40点光源の位置を検出する点光源位置検出装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a point light source position detection device for detecting the position of 40 point light sources of LEDs (light emitting diodes) or halogen lamps.
点光源の位置を検出する装置としては種々のものがある
が、以下に従来の点光源位置検出装置について説明する
。第1の装置として、テレビジョンカメラとデジタル画
像処理回路を組み合わせたものがある。点光源の位置検
出精度は、測定視野を画素数で除した分解能によって定
まり、通常のテレビジョンカメラでは水平方向及び垂直
方向とも11512である。又、テレビジョンカメ2の
代わシに固体撮像素子、即ち光電変換素子を縦横に並べ
た二次元フォトマトリックスイメージセンサ(例えば、
CODカメラなど)では1/400である。又、テレビ
ジョンカメラは7オトマトリクスイメージセンサによっ
て得られた画像信号に基づいて点光源の位置を検出する
には数秒の時間を要す。Although there are various devices for detecting the position of a point light source, a conventional point light source position detection device will be described below. The first device is a combination of a television camera and digital image processing circuitry. The position detection accuracy of a point light source is determined by the resolution obtained by dividing the measurement field of view by the number of pixels, and is 11512 in both the horizontal and vertical directions for a normal television camera. In addition, instead of the television camera 2, a two-dimensional photo matrix image sensor (for example,
COD cameras, etc.), it is 1/400. In addition, it takes several seconds for a television camera to detect the position of a point light source based on the image signal obtained by the seven omatrix image sensors.
第2の装置として、テレビジョンカメラとアナログ光点
検出器を組み合せたものがある。点光源の位置検出精度
は第1の装置と同じであシ、又位置検出時間は1/60
秒程度である。A second device is a combination of a television camera and an analog light spot detector. The position detection accuracy of the point light source is the same as the first device, and the position detection time is 1/60.
It is about seconds.
第3の装置として、光電子倍増管を用いたイメージディ
セクタ一方式と言われているものがある。A third type of device is one called an image dissector type using a photomultiplier tube.
これは光電子倍増管上に結像した光点位置から発生する
電子ビームをアパーチャに集束させるものであシ、電子
ビームの集束のために偏向コイルに印加する電圧の大き
さとして点光源の位置が検出されるようになっている。This focuses the electron beam generated from the position of the light spot imaged on the photomultiplier tube onto the aperture, and the position of the point light source is determined by the magnitude of the voltage applied to the deflection coil to focus the electron beam. It is now detected.
この装置の位置検出精度は第1の装置とほぼ同程度の1
1500である。The position detection accuracy of this device is approximately the same as that of the first device.
It is 1500.
第4の装置として、半導体装置検出器を用いたものがあ
る。これは半導体装置検出器上に点光源儂を結像させ、
その結像位置に対応する光電流から点光源の位置を検出
するものである。位置検出精度は1/100程度である
。A fourth device uses a semiconductor device detector. This images a point source onto the semiconductor device detector,
The position of the point light source is detected from the photocurrent corresponding to the imaging position. The position detection accuracy is about 1/100.
従来の点光源位置検出装置は位置検出精度が1/100
〜11512、位置検出時間が数秒〜1/60秒なので
、高精度でしかも短時間で点光源の位置を検出できない
という問題があった。The position detection accuracy of conventional point light source position detection devices is 1/100.
~11512, the position detection time is several seconds to 1/60 seconds, so there was a problem that the position of the point light source could not be detected with high precision and in a short time.
又、7オトマトリクスイメージセンサを用いた第1の装
置線分解能を1桁上げるためには光電変換素子を100
倍以上に増やさなければならない。In addition, in order to increase the linear resolution of the first device using a 7-otomatrix image sensor by one order of magnitude, the number of photoelectric conversion elements must be increased by 100.
It has to be more than doubled.
そのような7オトマトリクスイメージセンサの製造は歩
留シが悪く、分解能を上げるための効果的な手段とは言
い難い。Manufacturing such a 7-otomatrix image sensor has a poor yield, and it cannot be said to be an effective means for increasing resolution.
又、第3の装置に用いる光電子倍増管は特殊なものであ
シ、衝撃に弱い。測定範囲を左右するレンズは通常のC
CTV用のレンズを使用できないので、測定範囲に制限
が生じる。Furthermore, the photomultiplier tube used in the third device is a special type and is susceptible to shocks. The lens that affects the measurement range is a regular C lens.
Since a CTV lens cannot be used, the measurement range is limited.
又、第4の装置は外光の影響を受は易いという欠点があ
る。Furthermore, the fourth device has the disadvantage that it is easily affected by external light.
本発明は以上実情に鑑みてなされたもので、位置検出時
間が短カ<、位置検出精度が高い点光源位置検出装置を
提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide a point light source position detection device that has a short position detection time and high position detection accuracy.
そこで本発明では、略V字状又は略U字状の溝が格子状
に形成され、点光源の点状光源像を略十文字状光像に変
化させるクロスフィルタと、方形状に配置され、略十文
字状光像の4つの突起部分がそれぞれ結像される4個の
フォトアレイイメージセンサと、各フォトアレイイメー
ジセンナの各光電変換出力に基づいて、略十文字状光像
の各突起部分の各フォトアレイイメージセンサへのそれ
ぞれの結像位置を検出する結像位置検出回路と、対向す
る7オトアレイイメージセンナから得られる結像位置の
平均値をそれぞれ算出して、点光源の位置を検出すゐ点
光源位置検出回路とから点光源位置検出装置を構成する
。Therefore, in the present invention, substantially V-shaped or substantially U-shaped grooves are formed in a lattice pattern, and a cross filter that changes a point light source image of a point light source into a substantially cross-shaped light image is arranged in a substantially rectangular shape. Four photo array image sensors each form an image of the four protruding parts of the cross-shaped optical image, and each photo of each protruding part of the approximately cross-shaped optical image is determined based on each photoelectric conversion output of each photo array image sensor. The image forming position detection circuit detects each image forming position on the array image sensor, and the average value of the image forming positions obtained from the 7 opposing automatic array image sensors is calculated to detect the position of the point light source. A point light source position detection device is constructed from the point light source position detection circuit.
上記構成の点光源位置検出装置は、クロスフィルタが点
光源の点状光源像を略十文字状光像に変化させ、この略
十文字状光像を方形状に配置された4つのフォトアレイ
センナに入射させる。次いでN入射位置検出回路が各フ
ォトアレイセンサの各光電変換出力に基づいて略十文字
光像の各突起部分の各フォトセンサアレイへのそれぞれ
の入射位置を検出し、点光源位置検出回路が対向するフ
ォトアレイセンサから得られる入射位置の平均値を算出
して、点光源の位置を検出する。In the point light source position detection device with the above configuration, the cross filter changes the point light source image of the point light source into a substantially cross-shaped light image, and this substantially cross-shaped light image is incident on four photo array sensors arranged in a rectangular shape. let Next, an N incident position detection circuit detects the respective incident positions of each protruding portion of the approximately cross-shaped light image on each photo sensor array based on each photoelectric conversion output of each photo array sensor, and a point light source position detection circuit faces the N incident position detection circuits. The position of the point light source is detected by calculating the average value of the incident positions obtained from the photo array sensor.
〔実施例〕
以下、本発明の一実施例を添付図面を参照して詳細に説
明する。[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.
第1図は本発明に係る点光源位置検出装置のブロック図
である。第1図において、1拡点光源、2は略V字状又
は略U字状の溝が格子状に形成されておシ、点光源1の
点状光源像を略十文字状光像に変化させるクロスフィル
タ、6はレンズ、4゜5.6及び7は方形状に配置され
ておシ、それぞれ複数の光電変換素子が一列に並べられ
た。フォトアレイイメージセンサ、8.9.10及び1
1は略十文字状光像の4つの突起部分がそれぞれフォト
アレイイメージセンサ4,5.6及び7のどの位置にあ
る光電変換素子に結像されたかをそれぞれ検出すること
によって、略十文字状光像の各突起部分の各フォトアレ
イイメージセンサへのそれぞれの結像位置をそれぞれ検
出する結像位置検出回路、12及び13はそれぞれ対向
するフォトアレイイメージセンサ4と6及びフォトアレ
イイメージセンサ5と7の結像位置の平均を算出して点
光源1の水平方向及び垂直方向の位置を検出する点光源
位置検出回路である。FIG. 1 is a block diagram of a point light source position detection device according to the present invention. In FIG. 1, 1 is a wide point light source, 2 is a substantially V-shaped or substantially U-shaped groove formed in a lattice shape, and changes the point light source image of the point light source 1 into a substantially cross-shaped light image. A cross filter, 6 is a lens, 4°5.6 and 7 are arranged in a rectangular shape, each of which has a plurality of photoelectric conversion elements arranged in a line. Photo array image sensor, 8.9.10 and 1
1, a substantially cross-shaped optical image is generated by detecting which positions of the photoelectric conversion elements of the photo array image sensors 4, 5, 6, and 7 each of the four protruding portions of the substantially cross-shaped optical image are imaged. Imaging position detection circuits 12 and 13 respectively detect the respective imaging positions of the protrusions of the photo array image sensors 4 and 6 and the photo array image sensors 5 and 7 facing each other. This is a point light source position detection circuit that calculates the average of the image formation positions and detects the horizontal and vertical positions of the point light source 1.
次に、本発明に係る点光源位置検出装置の全体の動作に
ついて説明する。まず、点光源10点状光源像はクロス
フィルタ2によって略十文字状光像に変化され、レンズ
6によってフォトアレイセンサ4〜7上に結像される。Next, the overall operation of the point light source position detection device according to the present invention will be explained. First, the point light source 10 point light source image is changed into a substantially cross-shaped light image by the cross filter 2, and the image is formed on the photo array sensors 4 to 7 by the lens 6.
この略十文字状光像は第2図に示すように4つの突起部
分がそれぞれフォトアレイイメージセンサ4〜7上に結
像することになる。各フォトアレイイメージセンサ4〜
7はそれぞれ略十文字状光像の突起部分の結像された光
電変換素子がこれを検出する。次いで、結像位置検出回
路8〜11はそれぞれフォトアレイイメージセンサ4〜
7のそれぞれの光電変換出力Klづいて1路中文字状光
偉の各突起部分ノ各フォトアレイイメージセンサ4〜7
への結像位置を検出する。この結像位置は水平方向に置
かれたフォトアレイイメージセンサ4及び6については
1各センサ4及び6の左端からの距離X、及びXtとし
て検出する。又、垂直方向に置かれたフォトアレイイメ
ージセンサ5及び7については、各センサ5及び7の下
端からの距離Y、及びY、として結像位置を検出する。As shown in FIG. 2, this substantially cross-shaped optical image is formed by four protrusions formed on the photo array image sensors 4 to 7, respectively. Each photo array image sensor 4~
7, a photoelectric conversion element on which a protruding portion of a substantially cross-shaped optical image is formed detects this. Next, the imaging position detection circuits 8 to 11 respectively correspond to the photo array image sensors 4 to 11.
Each photo array image sensor 4 to 7 is connected to each protruding portion of the letter-shaped light beam in one path according to each photoelectric conversion output Kl of 7.
Detect the imaging position. For the photo array image sensors 4 and 6 placed in the horizontal direction, this imaging position is detected as distances X and Xt from the left end of each sensor 4 and 6, respectively. Further, for the photo array image sensors 5 and 7 placed in the vertical direction, the imaging positions are detected as distances Y and Y from the bottom ends of the respective sensors 5 and 7.
次いで、点光源位置検出回路12は結像位置検出回路8
及び10が検出した結像位置X、及びXtの平均Xs
(Xs ” (X+ +xt ) / 2 )を算出し
て点光源1の水平方向の位置を検出する。同様にして点
光源位置検出回路16は結像位置検出回路5及び7の結
像位置Y、及びY、よシ点光源1の垂直方向の位置Ys
(Ys −(Y+ +Yt ) / 2 )を検出す
る。Next, the point light source position detection circuit 12 is connected to the imaging position detection circuit 8.
and the imaging position X detected by 10, and the average Xs of Xt
(Xs '' (X+ +xt) / 2) to detect the horizontal position of the point light source 1.Similarly, the point light source position detection circuit 16 calculates the imaging position Y of the imaging position detection circuits 5 and 7, and Y, vertical position Ys of point light source 1
(Ys - (Y+ + Yt) / 2) is detected.
なお、本実施例では各フォトセンサアレイ4〜7に対応
して結像位置検出回路8〜11を設けたので、点光源1
の位置を短時間で検出できるようにしたが、多少時間が
かかつても良いときは、結像位置検出回路を1つにし、
スイッチの切シ換えによシアオドセンサアレイ4〜7の
光電変換出力が結像位置検出回路に顆次入力されるよう
にしても良い。In addition, in this embodiment, since the imaging position detection circuits 8 to 11 are provided corresponding to each of the photosensor arrays 4 to 7, the point light source 1
The position of the image can be detected in a short time, but if it is okay if it takes a little time, it is possible to use only one imaging position detection circuit.
The photoelectric conversion outputs of the shear odometer arrays 4 to 7 may be sequentially input to the imaging position detection circuit by switching a switch.
以上説明したように本発明によれば、クロスフィルタに
よって点光源の点状光源像を略十文字状光像に変化させ
ることによって点状光源像が上下左右に拡大され、略十
文字状光像の各突起部分が方形状に配置された7オトア
レイイメージセンナに結像された位置を結像位置検出回
路によって検出し、点光源位置検出回路によって結像位
置の平均値を点光源の位置として検出するようにしたの
で、点光源の位置が高精度に検出できる点光源位置検出
装置を得る。As explained above, according to the present invention, the point light source image of the point light source is changed into a substantially criss-cross light image by the cross filter, so that the point light source image is enlarged vertically and horizontally, and each of the substantially crisscross-shaped light images is An imaging position detection circuit detects the position imaged on a 7-photo array image sensor with protrusions arranged in a rectangular shape, and a point light source position detection circuit detects the average value of the imaging positions as the position of the point light source. As a result, a point light source position detection device capable of detecting the position of a point light source with high accuracy is obtained.
又、点光源の位置は結像位置の検出及び結像位置の平均
値の算出によシ短時間で検出できる。Further, the position of the point light source can be detected in a short time by detecting the image formation position and calculating the average value of the image formation position.
第1図は本発明に係る点光源位置検出装置のブロック図
、第2図は略十文字状光像の7オトアレイ゛イメージセ
ンナへの結像を示す説明図である。
1・・・点光源、 2・・・クロスフィルタ、 3
−3.レンズ、4.5.6.7・・・フォトアレイイメ
ージセンサ、8,9.10.11・・・結像位置検出回
路、12.13・・・点光源位置検出回路。FIG. 1 is a block diagram of a point light source position detection device according to the present invention, and FIG. 2 is an explanatory diagram showing the formation of a substantially cross-shaped light image on a 7-auto array image sensor. 1... Point light source, 2... Cross filter, 3
-3. Lens, 4.5.6.7... Photo array image sensor, 8, 9.10.11... Imaging position detection circuit, 12.13... Point light source position detection circuit.
Claims (3)
点光源の点状光源像を略十文字状光像に変化させるクロ
スフィルタと、方形状に配置され、前記略十文字状光像
の4つの突起部分がそれぞれ結像される4個のフォトア
レイイメージセンサと、該フォトアレイイメージセンサ
の各光電変換出力に基づいて、前記略十文字状光像の各
突起部分の前記各フォトアレイイメージセンサへのそれ
ぞれの結像位置を検出する結像位置検出回路と、対向す
る前記フォトアレイイメージセンサから得られる結像位
置の平均値をそれぞれ算出して、前記点光源の位置を検
出する点光源位置検出回路とを備えたことを特徴とする
点光源位置検出装置。(1) Approximately V-shaped or approximately U-shaped grooves are formed in a lattice shape,
a cross filter that changes a point light source image of a point light source into a substantially cross-shaped light image; and four photo array image sensors that are arranged in a rectangular shape and image each of the four protrusions of the substantially cross-shaped light image. and an imaging position detection circuit that detects the imaging position of each protrusion portion of the substantially cross-shaped optical image on each of the photo array image sensors based on each photoelectric conversion output of the photo array image sensor; A point light source position detection device comprising: a point light source position detection circuit that calculates an average value of image formation positions obtained from the opposing photo array image sensors to detect the position of the point light source.
ンサのそれぞれに対応して設けられている特許請求の範
囲第1項記載の点光源位置検出装置。(2) The point light source position detection device according to claim 1, wherein the incident position detection circuit is provided corresponding to each of the four photo array sensors.
ンサの検出出力が順次入力されるように切換スイッチを
有している特許請求の範囲第1項記載の点光源位置検出
装置。(3) The point light source position detecting device according to claim 1, wherein the incident position detecting circuit has a changeover switch so that the detection outputs of the four photo array sensors are sequentially input.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087885A JPS61289785A (en) | 1985-06-18 | 1985-06-18 | Dot light source position detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13087885A JPS61289785A (en) | 1985-06-18 | 1985-06-18 | Dot light source position detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61289785A true JPS61289785A (en) | 1986-12-19 |
Family
ID=15044802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13087885A Pending JPS61289785A (en) | 1985-06-18 | 1985-06-18 | Dot light source position detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61289785A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8096661B2 (en) * | 2006-06-29 | 2012-01-17 | Sanyo Electric Co., Ltd. | Projector having a cross-shaped light beam |
-
1985
- 1985-06-18 JP JP13087885A patent/JPS61289785A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8096661B2 (en) * | 2006-06-29 | 2012-01-17 | Sanyo Electric Co., Ltd. | Projector having a cross-shaped light beam |
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