CA2236772C - Focusing-type calculating means - Google Patents

Focusing-type calculating means Download PDF

Info

Publication number
CA2236772C
CA2236772C CA002236772A CA2236772A CA2236772C CA 2236772 C CA2236772 C CA 2236772C CA 002236772 A CA002236772 A CA 002236772A CA 2236772 A CA2236772 A CA 2236772A CA 2236772 C CA2236772 C CA 2236772C
Authority
CA
Canada
Prior art keywords
shaped
focusing
tooth
lenses
calculating device
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.)
Expired - Fee Related
Application number
CA002236772A
Other languages
English (en)
French (fr)
Other versions
CA2236772A1 (en
Inventor
Ching Shun Wang
Cheng-Liang Hsieh
Shu Fang Lu
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.)
YANG YOU-YAN
Liu Yu Shian
Original Assignee
YANG YOU-YAN
Liu Yu Shian
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 YANG YOU-YAN, Liu Yu Shian filed Critical YANG YOU-YAN
Priority to CA002236772A priority Critical patent/CA2236772C/en
Priority to FR9807290A priority patent/FR2779815A1/fr
Priority to DE19826009A priority patent/DE19826009C2/de
Priority to GB9812912A priority patent/GB2338549A/en
Publication of CA2236772A1 publication Critical patent/CA2236772A1/en
Application granted granted Critical
Publication of CA2236772C publication Critical patent/CA2236772C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/28—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding
    • H03M1/30—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding incremental
    • H03M1/301—Constructional details of parts relevant to the encoding mechanism, e.g. pattern carriers, pattern sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36—Forming the light into pulses
    • G01D5/38—Forming the light into pulses by diffraction gratings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Transform (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Position Input By Displaying (AREA)
  • Length Measuring Devices By Optical Means (AREA)
CA002236772A 1998-06-02 1998-06-02 Focusing-type calculating means Expired - Fee Related CA2236772C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CA002236772A CA2236772C (en) 1998-06-02 1998-06-02 Focusing-type calculating means
FR9807290A FR2779815A1 (fr) 1998-06-02 1998-06-10 Moyens de calcul de type a focalisation
DE19826009A DE19826009C2 (de) 1998-06-02 1998-06-10 Optischer Kodierer
GB9812912A GB2338549A (en) 1998-06-02 1998-06-15 A Rotary Encoder

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002236772A CA2236772C (en) 1998-06-02 1998-06-02 Focusing-type calculating means
FR9807290A FR2779815A1 (fr) 1998-06-02 1998-06-10 Moyens de calcul de type a focalisation
DE19826009A DE19826009C2 (de) 1998-06-02 1998-06-10 Optischer Kodierer
GB9812912A GB2338549A (en) 1998-06-02 1998-06-15 A Rotary Encoder

Publications (2)

Publication Number Publication Date
CA2236772A1 CA2236772A1 (en) 1999-12-02
CA2236772C true CA2236772C (en) 2003-07-29

Family

ID=32966513

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002236772A Expired - Fee Related CA2236772C (en) 1998-06-02 1998-06-02 Focusing-type calculating means

Country Status (4)

Country Link
CA (1) CA2236772C (de)
DE (1) DE19826009C2 (de)
FR (1) FR2779815A1 (de)
GB (1) GB2338549A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101514909B (zh) * 2008-02-22 2011-07-27 鸿富锦精密工业（深圳）有限公司 光学编码盘以及相应的光学编码器
CN101709982B (zh) * 2009-11-05 2011-06-15 无锡鑫亚电子有限公司 一种旋转编码器

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR77221E (fr) * 1960-02-23 1962-02-02 Levallois Optique Et Prec Appareil photo-électrique pour la vérification ou la commande de positions
GB991873A (en) * 1961-12-04 1965-05-12 Hensoldt & Soehne Optik Equipment for indicating the amount of the displacement of a moving part
DE2543668A1 (de) * 1974-10-10 1976-04-22 Papst Motoren Kg Inkremental regelbarer antrieb
GB2049165A (en) * 1979-05-08 1980-12-17 Pye Ltd Dual beam spectrophotometer
US4528448A (en) * 1982-05-13 1985-07-09 Benson, Inc. Plane linear grating for optically encoding information
JPS5963517A (ja) * 1982-10-04 1984-04-11 Nippon Kogaku Kk <Nikon> 光電式エンコ−ダ
JPS6070311A (ja) * 1983-09-27 1985-04-22 Mitsubishi Electric Corp 光学式エンコ−ダ
JPH087082B2 (ja) * 1990-09-05 1996-01-29 松下電器産業株式会社 光学式エンコーダ
JP3170902B2 (ja) * 1992-09-30 2001-05-28 キヤノン株式会社 信号処理方法及びそれを用いたエンコーダ
JPH08201114A (ja) * 1995-01-24 1996-08-09 Matsushita Electric Ind Co Ltd 光学式エンコーダ
JPH10239108A (ja) * 1997-02-21 1998-09-11 Fanuc Ltd 光学式エンコーダ

Also Published As

Publication number Publication date
DE19826009C2 (de) 2002-06-20
GB9812912D0 (en) 1998-08-12
GB2338549A (en) 1999-12-22
DE19826009A1 (de) 1999-12-16
CA2236772A1 (en) 1999-12-02
FR2779815A1 (fr) 1999-12-17

Similar Documents

Publication Publication Date Title
US5498870A (en) Rotation information detection apparatus
US8658964B2 (en) Photoelectric encoder with optical grating
EP0248479B1 (de) Optische Messanordnung des Abstands zwischen einer Oberfläche und einer Bezugsebene
US11852852B2 (en) Patterned mirror edge for stray beam and interference mitigation
KR970050402A (ko) 광 픽업 장치 , 광 픽업용 대물 렌즈, 광 픽업용 집광 광학계 및 광 디스크 장치
JP2003515738A (ja) 特に不透明液滴といったような実質的に球形の粒子のサイズを回折によって測定するための装置
US6100519A (en) Photo-detector based calculating means having a grating wheel with integrated lenses
CN1388960A (zh) 光学元件、光半导体装置及使用它们的光学式信息处理装置
US5408450A (en) Optical pickup apparatus
CA2236772C (en) Focusing-type calculating means
US6194708B1 (en) Focus-type encode device
JPH0882677A (ja) 反射測定装置
KR200190808Y1 (ko) 광엔코더
JPS5922992B2 (ja) 情報読取装置
JP2001074632A (ja) 光スポット形成装置の光射出部の形成方法
JP2812072B2 (ja) 情報読み取り装置
JPS6121707Y2 (de)
JP3494148B2 (ja) フォーカス検出装置及びレーザ検査加工装置
JP2541947B2 (ja) 絶対位置検出装置
JPH11203708A (ja) 光記録・再生装置および光記録・再生方法
JPH07182665A (ja) 光ピックアップシステム
JP2795293B2 (ja) バーコード読取り装置
WO2003073085A1 (fr) Dispositif d&#39;inspection superficielle de corps etrangers
JPH0552523A (ja) 光学式寸法測定器
US7041964B2 (en) Method and apparatus for improved collection efficiency of speckle based navigation sensors using lightpipes and reflectors

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed