JPS59144517U - optical scale reader - Google Patents

optical scale reader

Info

Publication number
JPS59144517U
JPS59144517U JP3952783U JP3952783U JPS59144517U JP S59144517 U JPS59144517 U JP S59144517U JP 3952783 U JP3952783 U JP 3952783U JP 3952783 U JP3952783 U JP 3952783U JP S59144517 U JPS59144517 U JP S59144517U
Authority
JP
Japan
Prior art keywords
scale
positive
wave signal
reading device
hold circuit
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
Application number
JP3952783U
Other languages
Japanese (ja)
Other versions
JPH0233132Y2 (en
Inventor
浩二 秋山
秀人 岩岡
Original Assignee
横河電機株式会社
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 横河電機株式会社 filed Critical 横河電機株式会社
Priority to JP3952783U priority Critical patent/JPS59144517U/en
Publication of JPS59144517U publication Critical patent/JPS59144517U/en
Application granted granted Critical
Publication of JPH0233132Y2 publication Critical patent/JPH0233132Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Optical Transform (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第１図は従来装置の構成を示す図、第２図は受、光素子
の構成を示す図、第３図は出力正弦波の波′　形を示す
図、第４図はパルス化の方法を示す図、第５図は本考案
の一実施例を示す構成ブロック図、第６図は本考案の具
体的構成を示す電気回路図、第７図、第８図は各部の動
作波形を示すタイミングチャート、第９図、１１図は本
考案の他の実施例を示す電気回路図、第１０図はスイッ
チ駆動波形を示すタイミングチャートである。 １・・・レーザ駆動回路、１′・・・半導体レーザ、２
・・・スケール、３・・・受光素子、４．５・・・増幅
器、６゜７・・・比較器、８・・・４分割回路、９・・
・カウンタ、１０・・・表示部、Ｌ□、Ｌ２・・・レン
ズ、ＨＭ・・・ハーフミラ−１１１，１２・・・ピーク
値検出回路、１３・・・比較器、１４・・・ダウン検出
回路、１５・・・アップ検出回路ζＲ□ｓ　Ｒ２・・・
抵抗、２１．２２・・・アナログホールド回路、２３・
・・スイッチ制御回路、３１・・・Ａ／Ｄ変換器、３２
・・・マイクロプロセッサ、３３・・・Ｄ／Ａ変換器、
３４・・・メモリ。 請 １ ６０Figure 1 shows the configuration of a conventional device, Figure 2 shows the configuration of the receiving and optical elements, Figure 3 shows the waveform of the output sine wave, and Figure 4 shows the method of pulsing. 5 is a configuration block diagram showing an embodiment of the present invention, FIG. 6 is an electric circuit diagram showing a specific configuration of the present invention, and FIGS. 7 and 8 are timing diagrams showing operating waveforms of each part. 9 and 11 are electrical circuit diagrams showing other embodiments of the present invention, and FIG. 10 is a timing chart showing switch drive waveforms. 1... Laser drive circuit, 1'... Semiconductor laser, 2
... Scale, 3... Light receiving element, 4.5... Amplifier, 6°7... Comparator, 8... 4-division circuit, 9...
・Counter, 10...Display section, L□, L2...Lens, HM...Half mirror 111, 12...Peak value detection circuit, 13...Comparator, 14...Down detection circuit , 15...up detection circuit ζR□s R2...
Resistor, 21.22...Analog hold circuit, 23.
...Switch control circuit, 31...A/D converter, 32
...Microprocessor, 33...D/A converter,
34...Memory. 1 60

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 可干渉性光源をスケールに照射し反射回折光同志の干渉
光から位相の異なる２つの正弦波をつくり、この正弦波
をディジタル処理してスケールの移動方向及び移動距離
を算出するようにした光学式スケール読敢装置において
、読取ヘッドから出力される繰り返し正弦波信号の正負
のピーク値を検出して保持するピークホールド回路を具
備し、前記正弦波信号をパルス化する比較回路の基準電
圧として前記ピークホールド回路から取出した正負ピー
ク値の差電圧に応じた電圧を用いるようにしたことを特
徴とする光学式スケール読取装置。An optical system that irradiates a scale with a coherent light source, creates two sine waves with different phases from the interference light of the reflected diffracted light, and digitally processes these sine waves to calculate the moving direction and distance of the scale. The scale reading device includes a peak hold circuit that detects and holds the positive and negative peak values of a repetitive sine wave signal output from the reading head, and uses the peak as a reference voltage of a comparison circuit that pulses the sine wave signal. An optical scale reading device characterized in that a voltage corresponding to a voltage difference between positive and negative peak values taken out from a hold circuit is used.
JP3952783U 1983-03-18 1983-03-18 optical scale reader Granted JPS59144517U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3952783U JPS59144517U (en) 1983-03-18 1983-03-18 optical scale reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3952783U JPS59144517U (en) 1983-03-18 1983-03-18 optical scale reader

Publications (2)

Publication Number Publication Date
JPS59144517U true JPS59144517U (en) 1984-09-27
JPH0233132Y2 JPH0233132Y2 (en) 1990-09-06

Family

ID=30170170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3952783U Granted JPS59144517U (en) 1983-03-18 1983-03-18 optical scale reader

Country Status (1)

Country Link
JP (1) JPS59144517U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010019676A (en) * 2008-07-10 2010-01-28 Ono Sokki Co Ltd Comparator circuit, encoder, combustion analyzing system, and method for controlling comparator circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621715U (en) * 1979-07-26 1981-02-26

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2007737B (en) * 1977-11-14 1982-03-31 Reiners Verwaltungs Gmbh Method and device for joining textile therads

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621715U (en) * 1979-07-26 1981-02-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010019676A (en) * 2008-07-10 2010-01-28 Ono Sokki Co Ltd Comparator circuit, encoder, combustion analyzing system, and method for controlling comparator circuit

Also Published As

Publication number Publication date
JPH0233132Y2 (en) 1990-09-06

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