JPS6179121A - Light intensity measuring instrument - Google Patents
Light intensity measuring instrumentInfo
- Publication number
- JPS6179121A JPS6179121A JP20259984A JP20259984A JPS6179121A JP S6179121 A JPS6179121 A JP S6179121A JP 20259984 A JP20259984 A JP 20259984A JP 20259984 A JP20259984 A JP 20259984A JP S6179121 A JPS6179121 A JP S6179121A
- Authority
- JP
- Japan
- Prior art keywords
- light
- circuit
- light intensity
- receiving element
- emitting element
- 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
Links
- 230000035945 sensitivity Effects 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、発光ダイオード等の発光素子からの光の光度
を測定する光度測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a photointensity measuring device for measuring the luminous intensity of light from a light emitting element such as a light emitting diode.
（ロ）従来技術
従来から発光ダイオード等の発光素子からの発光波長は
同一色であうでも若干界なる。従ってこのような発光素
子の光度を測定する受光素子はその光の波長により感度
特性がロット等によりそれぞれ異なるため、同じ発光素
子からの光を検出しても出力が大きくなったり小さくな
ったりする。(B) Prior Art Conventionally, the wavelengths of light emitted from light-emitting elements such as light-emitting diodes vary slightly even if they are of the same color. Therefore, the sensitivity characteristics of the light-receiving elements that measure the luminous intensity of such light-emitting elements vary depending on the wavelength of the light, depending on the lot, etc., so even if light from the same light-emitting element is detected, the output may become larger or smaller.
従って、このような受光素子を用いた従来の光度測定装
置は、被検出物である発光素子の発光波長を検出するこ
とができないので発光素子の光度分類をするとき誤分類
の原因となる。Therefore, the conventional photometry device using such a light receiving element cannot detect the emission wavelength of the light emitting element as an object to be detected, which causes misclassification when classifying the luminous intensity of the light emitting element.
（ハ）目的
本発明は、前述の技術的課題を解決し、被検出物である
発光素子の光度を正確に分類することができる光度測定
装置を提供することを目的とする。(C) Objective The object of the present invention is to solve the above-mentioned technical problems and provide a photointensity measuring device capable of accurately classifying the luminous intensity of a light emitting element as an object to be detected.
（ニ）構成
本発明は、発光素子からの光の波長に対する感度特性が
それぞれ異なる第１の受光素子と第２の受光素子と、前
記第１の受光素子と第２の受光素子との各出力のアナロ
グ信号をデジタル信号に変換するアナログ／デジタル変
換回路と、発光素子からの光の波長に対して前記第１の
受光素子の出力を補正するための補正値を予め記憶させ
る記憶回路と、前記発光素子からの光の波長を判定し光
の光度を表示させる表示信号を作成する処理回路とを含
み、前記発光素子の光度を測定することを特徴とする光
度測定装置である。(D) Structure The present invention provides a first light receiving element and a second light receiving element each having different sensitivity characteristics with respect to the wavelength of light from a light emitting element, and respective outputs of the first light receiving element and the second light receiving element. an analog/digital conversion circuit that converts an analog signal into a digital signal; a storage circuit that stores in advance a correction value for correcting the output of the first light receiving element with respect to the wavelength of light from the light emitting element; The present invention is a photometric measuring device characterized in that it measures the luminous intensity of the light emitting element, and includes a processing circuit that determines the wavelength of light from the light emitting element and creates a display signal for displaying the luminous intensity of the light.
（ポ）実施例
第１図は、本発明の一実施例の電気的な構成を示すブロ
ック図である。第１図において、被検出物である発光素
子３からの光は受光素子１及び受光素子２に与えられる
。切り換え回路４は、受光素子１及び受光素子２からの
出力をそれぞれ切り換えアナログ／デジタル変換回路５
に与えるものである。アナログ／デジタル変換回路５は
切り換え回路４からのアナログ信号をデジタル信号に変
換し、インターフェイス６に与える。インターフェイス
６の出力は、マイクロコンピュータ等で実現される処理
回路７に与えられる。記憶回路８は、受光素子１の出力
を補正するための補正値を予め記憶させたり、受光素子
１及び受光素子２の光度に対する出力感度を記憶させた
りするものである。(P) Embodiment FIG. 1 is a block diagram showing the electrical configuration of an embodiment of the present invention. In FIG. 1, light from a light-emitting element 3, which is an object to be detected, is applied to a light-receiving element 1 and a light-receiving element 2. The switching circuit 4 switches the outputs from the light receiving element 1 and the light receiving element 2, respectively, and an analog/digital conversion circuit 5.
It is given to The analog/digital conversion circuit 5 converts the analog signal from the switching circuit 4 into a digital signal and supplies it to the interface 6. The output of the interface 6 is given to a processing circuit 7 realized by a microcomputer or the like. The memory circuit 8 stores in advance a correction value for correcting the output of the light receiving element 1, and stores the output sensitivity of the light receiving element 1 and the light receiving element 2 with respect to luminous intensity.
ｌ１０（入出力）回路９は、処理回路７からの処理情報
を光度表示回路１０に与える。ランク表示回路１１は、
発光素子３の光度の分類を表示するものである。The l10 (input/output) circuit 9 provides processing information from the processing circuit 7 to the luminous intensity display circuit 10. The rank display circuit 11 is
The classification of the luminous intensity of the light emitting element 3 is displayed.
第２図は第１図に示す受光素子１及び受光素子２の感度
特性を示すグラフである。このグラフを参照して本装置
の動作を説明する。FIG. 2 is a graph showing the sensitivity characteristics of the light receiving element 1 and the light receiving element 2 shown in FIG. The operation of this device will be explained with reference to this graph.
第２図に於いてラインＡで示すグラフは受光素子１の感
度特性を示し、ラインＢで示すグラフは受光素子２の感
度特性を示す。In FIG. 2, the graph indicated by line A indicates the sensitivity characteristic of the light receiving element 1, and the graph indicated by line B indicates the sensitivity characteristic of the light receiving element 2.
まず処理回路７で発光素子７の発光波長を判別する動作
を説明する。例えば発光素子の発光波長がａ２であった
場合、第２図に示すように受光素子１および２の出力は
ともにｂ２となる。従って受光素子ｌの出力及び受光素
子２の出力がともにｂ２であれば発光素子３の発光波長
はａ２であることがわかる。First, the operation of determining the emission wavelength of the light emitting element 7 by the processing circuit 7 will be explained. For example, when the emission wavelength of the light emitting element is a2, the outputs of the light receiving elements 1 and 2 are both b2 as shown in FIG. Therefore, if the output of the light receiving element 1 and the output of the light receiving element 2 are both b2, it can be seen that the emission wavelength of the light emitting element 3 is a2.
記憶回路８では、前記発光波長ａ２に対応する受光素子
ｌの出力ｂ２と受光素子２の出力ｂ２とが予めデジタル
信号として記憶されている。In the storage circuit 8, the output b2 of the light receiving element 1 and the output b2 of the light receiving element 2 corresponding to the emission wavelength a2 are stored in advance as digital signals.
ここで被検出物の発光素子３の光度を測定する場合の動
作を説明する。被検出物である発光素子３からの光は受
光素子１及び２に与えられ、受光素子１の出力は第２図
に示すようにｂｌとなり、受光素子２の出力はｂ３とな
る。前記出力ｂ１はラインＡの下降領域の点ｅ１に対応
し、出力ｂ３はラインＢの上昇領域の点ｅ３に対応する
。従って処理回路７は点ｅ１と点ｅ３とにより発光素子
３からの光の波長はａｌと判定する。次に処理回路７は
発光素子３の発光波長が予め定めた波長の範囲内に入っ
ているか否かを判断するし、範囲内に入っていれば光度
表示回路１０に合格の表示を行う。Here, the operation when measuring the luminous intensity of the light emitting element 3 of the object to be detected will be explained. Light from the light-emitting element 3, which is the object to be detected, is given to the light-receiving elements 1 and 2, and the output of the light-receiving element 1 becomes bl, as shown in FIG. 2, and the output of the light-receiving element 2 becomes b3. The output b1 corresponds to the point e1 in the descending region of the line A, and the output b3 corresponds to the point e3 in the ascending region of the line B. Therefore, the processing circuit 7 determines that the wavelength of the light from the light emitting element 3 is al based on the points e1 and e3. Next, the processing circuit 7 determines whether the emission wavelength of the light emitting element 3 falls within a predetermined wavelength range, and if it falls within the range, displays a pass on the luminous intensity display circuit 10.
受光素子１の出力ｂ１に対応する光度は実際の光度より
高くなるため処理回路７は、記憶回路８に予め記憶され
ている受光素子１の出力を補正するための補正値によっ
て本来の光度を光度表示回路１０に表示させる。ランク
表示回路１１は、光度表示回路１０で表示された光度を
分類する。Since the luminous intensity corresponding to the output b1 of the light receiving element 1 is higher than the actual luminous intensity, the processing circuit 7 changes the original luminous intensity to the luminous intensity using a correction value for correcting the output of the light receiving element 1 stored in advance in the memory circuit 8. Displayed on the display circuit 10. The rank display circuit 11 classifies the luminous intensity displayed by the luminous intensity display circuit 10.
このように特性の異なる受光素子１及び２を用いること
によって発光素子３の発光波長を判別することができ、
又光度を測定することができる。By using the light receiving elements 1 and 2 having different characteristics in this way, the emission wavelength of the light emitting element 3 can be determined,
It is also possible to measure luminous intensity.
（へ）効果
本発明によれば、極端に波長の累なる発光素子の混入を
なくすることができ、同一色の光を発する発光素子でも
波長の異なるものは選別ができる。(f) Effects According to the present invention, it is possible to eliminate the mixing of light emitting elements with extremely different wavelengths, and it is possible to sort out light emitting elements that emit light of the same color but have different wavelengths.
また、予め定めた基準波長を中心として光度を選べるた
め人によって差のある視感度によらず選別ができる。In addition, since the luminous intensity can be selected around a predetermined reference wavelength, selection can be made without depending on the visibility, which varies from person to person.
【図面の簡単な説明】
第１図は本発明の一実施例の電気的な構成を示すプロ・
ツク図、第２図は第１図に示す受光素子１及°び２の感
度特性を示すグラフである。
１．２・・・受光素子、３・・・発光素子、５・・・ア
ナログ／デジタル変換回路、７・・・処理回路、８・・
・記憶回路。[Brief Description of the Drawings] Figure 1 is a professional diagram showing the electrical configuration of an embodiment of the present invention.
2 are graphs showing the sensitivity characteristics of the light receiving elements 1 and 2 shown in FIG. 1. 1.2... Light receiving element, 3... Light emitting element, 5... Analog/digital conversion circuit, 7... Processing circuit, 8...
・Memory circuit.
Claims (1)
なる第１の受光素子と第２の受光索子と、前記第１の受
光素子と第２の受光素子との各出力のアナログ信号をデ
ジタル信号に変換するアナログ／デジタル変換回路と、
発光素子からの光の波長に対して第１の受光素子の出力
を補正するための補正値を予め記憶させる記憶回路と、
前記発光素子からの光の波長を判定し、その光の光度を
表示させる表示信号を作成する処理回路とを含み、前記
発光素子の光度を測定することを特徴とする光度測定装
置。A first light-receiving element and a second light-receiving element each having different sensitivity characteristics with respect to the wavelength of light from the light-emitting element, and converting analog signals of respective outputs of the first light-receiving element and the second light-receiving element into digital signals. An analog/digital conversion circuit to convert,
a storage circuit that stores in advance a correction value for correcting the output of the first light receiving element with respect to the wavelength of light from the light emitting element;
A photometric measuring device characterized by comprising a processing circuit that determines the wavelength of light from the light emitting element and creates a display signal for displaying the luminous intensity of the light, and measures the luminous intensity of the light emitting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20259984A JPS6179121A (en) | 1984-09-26 | 1984-09-26 | Light intensity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20259984A JPS6179121A (en) | 1984-09-26 | 1984-09-26 | Light intensity measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6179121A true JPS6179121A (en) | 1986-04-22 |
Family
ID=16460125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20259984A Pending JPS6179121A (en) | 1984-09-26 | 1984-09-26 | Light intensity measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6179121A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967364A (en) * | 2011-08-31 | 2013-03-13 | 夏普株式会社 | Sensor circuit and electronic apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56111432A (en) * | 1980-02-08 | 1981-09-03 | Ricoh Co Ltd | Detector for quantity of light |
-
1984
- 1984-09-26 JP JP20259984A patent/JPS6179121A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56111432A (en) * | 1980-02-08 | 1981-09-03 | Ricoh Co Ltd | Detector for quantity of light |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967364A (en) * | 2011-08-31 | 2013-03-13 | 夏普株式会社 | Sensor circuit and electronic apparatus |
| CN102967364B (en) * | 2011-08-31 | 2014-11-05 | 夏普株式会社 | Sensor circuit and electronic apparatus |
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