JPS63313119A - Light quantity control system - Google Patents

Light quantity control system

Info

Publication number
JPS63313119A
JPS63313119A JP15050687A JP15050687A JPS63313119A JP S63313119 A JPS63313119 A JP S63313119A JP 15050687 A JP15050687 A JP 15050687A JP 15050687 A JP15050687 A JP 15050687A JP S63313119 A JPS63313119 A JP S63313119A
Authority
JP
Japan
Prior art keywords
light
light receiving
receiving element
receiving elements
elements
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
Application number
JP15050687A
Other languages
Japanese (ja)
Inventor
Nobuhiro Tsuchida
土田　悦弘
Teruo Narukawa
成川　輝雄
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.)
NEC Corp
Toshin Electric Co Ltd
Original Assignee
NEC Corp
Toshin Electric Co Ltd
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 NEC Corp, Toshin Electric Co Ltd filed Critical NEC Corp
Priority to JP15050687A priority Critical patent/JPS63313119A/en
Publication of JPS63313119A publication Critical patent/JPS63313119A/en
Pending legal-status Critical Current

Links

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  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

PURPOSE:To reduce variance in the quantity of light controlled according to the variance among light receiving elements by placing plural light receiving elements nearby a light emission source and approximating the quantity of light to a target value by the light quantity feedback of the light receiving elements. CONSTITUTION:Control is performed by using the mean value of a light receiving element 1 and a light receiving element 2, so the quantity of light is A'. The light quantity feedback is performed by a single light receiving element in a conventional light quantity control system, so the light quantity of light is controlled to B at the time of using the light receiving element 1 if a light quantity feedback circuit is so formed that the quantity of light is A while the value of a reference light receiving element is (a). Further, when the light receiving element 2 is used, the quantity of light is controlled to C. For the purpose, plural light receiving elements (2 elements 1 and 2 in this example) are placed nearby the light emission source and the quantities of light of the light receiving elements are fed back to approximate the quantity of light to the target value.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、各種装置に使用する発光源の光景制御に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to sight control of light emitting sources used in various devices.

〔従来の技術〕[Conventional technology]

従来、この種の光量制御方式は、単一の受光素子による
光量フィードバックとなっていた。Conventionally, this type of light amount control system has provided light amount feedback using a single light receiving element.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述した従来の光量制御方式は、単一の受光素子による
光量フィードバックとなっているので、制御される光量
が受光素子のバラツキに直接左右されるという欠点があ
る。The conventional light amount control method described above uses a single light-receiving element to provide light amount feedback, and therefore has the drawback that the amount of light to be controlled is directly affected by variations in the light-receiving element.

〔問題点を解決するための手段〕[Means for solving problems]

本発明の光量制御方式は、光量フィードバッグを行う為
に、複数個の受光素子を有し、その複数個の受光素子の
平均の値によシ制御する。The light amount control system of the present invention has a plurality of light receiving elements in order to perform light amount feedback, and control is performed based on the average value of the plurality of light receiving elements.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

第１図は、本発明の一実施例の概略図である。FIG. 1 is a schematic diagram of one embodiment of the invention.

従来の光量制御方式では、単一の受光素子によって、光
量フィードバックを行うため、光量フィードバック回路
が基準受光素子において受光素子の値がａの時、光量が
人となる様に形成されていた場合、受光素子１を使用し
た場合に線光量はＢに制御されてしまう。又、受光素子
２を使用し九　　　−場合にはＣに制御されてしまう（
第２図）。本発明によると受光素子１と受光素子２の平
均の値によシ制御を行うため、光量はＡ′となる。In the conventional light amount control method, since light amount feedback is performed using a single light receiving element, if the light amount feedback circuit is formed so that when the value of the light receiving element is a in the reference light receiving element, the light amount becomes human. When the light receiving element 1 is used, the amount of light is controlled to B. In addition, if the light receiving element 2 is used, it will be controlled to C (
Figure 2). According to the present invention, since control is performed using the average value of the light receiving elements 1 and 2, the amount of light is A'.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は光量制御の光量フィードバ
ックにおいて、複数個の受光素子を使用することによシ
、受光素子のバラツキによる制御される光量のバラツキ
を少なくするという効果がある。As described above, the present invention has the effect of reducing variations in the amount of light to be controlled due to variations in the light receiving elements by using a plurality of light receiving elements in light quantity feedback for light quantity control.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例の概略図である。第２図は、
本発明に用いる受光素子の光量特性図である。 第１図FIG. 1 is a schematic diagram of an embodiment of the present invention. Figure 2 shows
FIG. 3 is a light quantity characteristic diagram of a light receiving element used in the present invention. Figure 1

Claims (1)

【特許請求の範囲】[Claims] 発光源の近傍に複数の受光素子を置き、その複数の受光
素子による光量フィード・バックによって、光量を目標
値に近づけることを特徴とする光量制御方式。A light amount control method characterized in that a plurality of light receiving elements are placed near a light emitting source, and the light amount is brought closer to a target value through light amount feedback by the plurality of light receiving elements.
JP15050687A 1987-06-16 1987-06-16 Light quantity control system Pending JPS63313119A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15050687A JPS63313119A (en) 1987-06-16 1987-06-16 Light quantity control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15050687A JPS63313119A (en) 1987-06-16 1987-06-16 Light quantity control system

Publications (1)

Publication Number Publication Date
JPS63313119A true JPS63313119A (en) 1988-12-21

Family

ID=15498355

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15050687A Pending JPS63313119A (en) 1987-06-16 1987-06-16 Light quantity control system

Country Status (1)

Country Link
JP (1) JPS63313119A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53121590A (en) * 1977-03-29 1978-10-24 Post Office Device for stabilizing injection laser output characteristic

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53121590A (en) * 1977-03-29 1978-10-24 Post Office Device for stabilizing injection laser output characteristic

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