JPH02121708U - - Google Patents

Info

Publication number
JPH02121708U
JPH02121708U JP1989031581U JP3158189U JPH02121708U JP H02121708 U JPH02121708 U JP H02121708U JP 1989031581 U JP1989031581 U JP 1989031581U JP 3158189 U JP3158189 U JP 3158189U JP H02121708 U JPH02121708 U JP H02121708U
Authority
JP
Japan
Prior art keywords
reflectance
lens
information
optical pattern
moving ring
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
JP1989031581U
Other languages
English (en)
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 filed Critical
Priority to JP1989031581U priority Critical patent/JPH02121708U/ja
Priority to US07/492,891 priority patent/US5061952A/en
Priority to GB9005864A priority patent/GB2231957B/en
Priority to FR9003457A priority patent/FR2644579B1/fr
Priority to DE4008948A priority patent/DE4008948C2/de
Publication of JPH02121708U publication Critical patent/JPH02121708U/ja
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/003—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring position, not involving coordinate determination
    • 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
    • G01D5/12—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 using electric or magnetic means
    • G01D5/244—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/249—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 using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
    • G01D5/2497—Absolute encoders
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer

Description

【図面の簡単な説明】
第１図は、本考案のレンズ情報読取り装置を適
用したパワーズームレンズを備えたカメラの実施
例の概要を示したブロツク図、第２図は、同実施
例の動作を示すフローチヤートである。 １２……ズーム環、１４……モータ駆動回路、
１６……ＤＣモータ、１８……コード板（光学パ
ターン）、２０……フオトリフレクタ（位置検出
手段）、２１……発光素子、２２……受光素子、
２６……Ａ／Ｄ変換回路、２８……マイコン（反
射率記憶手段、位置検出手段、変換手段）、３２
……テレスイツチ、３４……ワイドスイツチ。

Claims (1)

  1. 【実用新案登録請求の範囲】 (1) レンズ移動環の運動によりレンズ群を移動
    させるレンズにおいて、 上記レンズ環の運動方向に沿つて設けられた、
    徐々に反射率が変化する光学パターンと、 該光学パターンの反射率を検出する反射率検出
    手段と、 上記レンズ移動環の両運動限界位置に対応する
    光学パターンの反射率情報を記憶する反射率記憶
    手段と、 上記反射率検出手段の出力と上記反射率記憶手
    段が記憶した情報とを比較してレンズ移動環の位
    置を求める位置検出手段と、 該位置検出手段が検出した位置情報を対応する
    開放絞り値または焦点距離情報などの光学情報に
    変換する情報変換手段とを有することを特徴とす
    るレンズ情報読取り装置。 (2) 請求項１において、上記レンズ移動環の両
    運動限界位置に対応する光学パターンの反射率情
    報が、レンズに搭載された記憶手段に格納され、
    該記憶手段から反射率記憶手段に送られることを
    特徴とするレンズ情報読取り装置。 (3) 請求項１において、反射率検出手段が、光
    学パターンに検出光を投光してその反射光を受光
    するフオトリフレクタと、該フオトリフレクタの
    出力をデジタル変換するＡ／Ｄ変換回路とからな
    り、反射率記憶手段が、上記レンズ移動環の運動
    限界位置に対応する上記光学パターンにおける上
    記フオトリフレクタのＡ／Ｄ変換出力情報を記憶
    していることを特徴とするレンズ情報読取り装置
    。
JP1989031581U 1989-03-20 1989-03-20 Pending JPH02121708U (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1989031581U JPH02121708U (ja) 1989-03-20 1989-03-20
US07/492,891 US5061952A (en) 1989-03-20 1990-03-13 Position sensing device
GB9005864A GB2231957B (en) 1989-03-20 1990-03-15 Position sensing device
FR9003457A FR2644579B1 (fr) 1989-03-20 1990-03-19 Dispositif de detection de position pour appareil photographique
DE4008948A DE4008948C2 (de) 1989-03-20 1990-03-20 Verfahren zum Einstellen eines Varioobjektivs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989031581U JPH02121708U (ja) 1989-03-20 1989-03-20

Publications (1)

Publication Number Publication Date
JPH02121708U true JPH02121708U (ja) 1990-10-03

Family

ID=12335154

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989031581U Pending JPH02121708U (ja) 1989-03-20 1989-03-20

Country Status (5)

Country Link
US (1) US5061952A (ja)
JP (1) JPH02121708U (ja)
DE (1) DE4008948C2 (ja)
FR (1) FR2644579B1 (ja)
GB (1) GB2231957B (ja)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5280317A (en) * 1986-05-12 1994-01-18 Asahi Kogaku Kogyo Kabushiki Kaisha Lens shutter camera including zoom lens drive system
US5475456A (en) * 1986-05-12 1995-12-12 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens drive system for lens shutter type of camera
EP0510379B1 (en) 1986-05-12 1995-12-27 Asahi Kogaku Kogyo Kabushiki Kaisha Lens cap opening and closing mechanism
JP2881959B2 (ja) * 1990-05-21 1999-04-12 ソニー株式会社 カメラ用レンズ鏡筒
DE4232864A1 (de) * 1992-09-30 1994-03-31 Thomson Brandt Gmbh Drehwinkel-, Drehzahl- und Drehrichtungsmessung
DK135493A (da) * 1993-12-03 1995-06-04 Force Inst Følerarrangement
CN1178467C (zh) * 1998-04-16 2004-12-01 三星电子株式会社 自动跟踪运动目标的方法和装置
US20040189804A1 (en) * 2000-02-16 2004-09-30 Borden George R. Method of selecting targets and generating feedback in object tracking systems
DE10163444A1 (de) * 2001-12-21 2003-07-03 Hans Rosner & Sohn Gmbh Meßsystem
GB0413827D0 (en) 2004-06-21 2004-07-21 Renishaw Plc Scale reading apparatus
GB0428165D0 (en) * 2004-12-23 2005-01-26 Renishaw Plc Position measurement
ATE429663T1 (de) * 2006-01-17 2009-05-15 Leica Camera Ag Wechselobjektiv mit optisch lesbarer kennung
JP2009526256A (ja) * 2006-02-06 2009-07-16 ノキア コーポレイション 結像システムにおける光学要素の位置検出のための方法及び装置
DE102006053587B3 (de) * 2006-11-14 2008-03-27 Emz-Hanauer Gmbh & Co. Kgaa Optischer Wegaufnehmer und Verfahren zu dessen Herstellung
US8063367B2 (en) * 2009-04-23 2011-11-22 Fluke Corporation Lens position sensor for infrared cameras
JP6020583B2 (ja) * 2012-10-11 2016-11-02 ソニー株式会社 位置検出装置、レンズ鏡筒、撮像装置
EP3271732A1 (en) * 2015-03-18 2018-01-24 Exxonmobil Upstream Research Company Single sensor systems and methods for detection of reverse rotation
US11692854B2 (en) 2018-08-30 2023-07-04 Ams Sensors Singapore Pte. Ltd. Optical position encoder

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109389A (en) * 1976-03-08 1978-08-29 Cetec Corporation Shaft angle transducer
US4320293A (en) * 1978-08-30 1982-03-16 Harold Guretzky Angle-position transducer
US4236804A (en) * 1979-07-19 1980-12-02 Nippon Kogaku K.K. Lens information introducing device having corrected extraneous light
US4410852A (en) * 1980-08-22 1983-10-18 Harold Guretzky Angle-position transducer
US4446526A (en) * 1981-07-02 1984-05-01 Asahi Kogaku Kogyo Kabushiki Kaisha Control circuit for zooming device
JPS5877306U (ja) * 1981-11-19 1983-05-25 旭光学工業株式会社 ズ−ミング装置
ZA818126B (en) * 1981-11-23 1982-09-15 Dennis William Burt Optical fibre transmission instrumentation
EP0094754B1 (en) * 1982-05-08 1987-02-04 Etablissements Pierre Angénieux SA An improved zoom lens for cameras
GB2173898A (en) * 1983-04-26 1986-10-22 Central Electr Generat Board Apparatus for optically measuring a displacement
JPS6089709A (ja) * 1983-10-21 1985-05-20 Mitsubishi Electric Corp 絶対位置検出装置
JPH0754391B2 (ja) * 1984-02-14 1995-06-07 オリンパス光学工業株式会社 カメラの露出制御装置
US4750821A (en) * 1984-08-24 1988-06-14 Canon Kabushiki Kaisha Zoom lens assembly
DE3438322A1 (de) * 1984-10-19 1986-04-24 Ernst Leitz Wetzlar Gmbh, 6330 Wetzlar Verfahren und einrichtung zur uebertragung von signaldaten
FR2595461B1 (fr) * 1986-03-04 1991-08-16 Peugeot Procede de reperage angulaire d'une machine tournante
EP0510379B1 (en) * 1986-05-12 1995-12-27 Asahi Kogaku Kogyo Kabushiki Kaisha Lens cap opening and closing mechanism
JP2505192B2 (ja) * 1987-03-10 1996-06-05 オリンパス光学工業株式会社 ズ−ム機構
US4942394A (en) * 1987-12-21 1990-07-17 Pitney Bowes Inc. Hall effect encoder apparatus

Also Published As

Publication number Publication date
DE4008948C2 (de) 1999-12-23
FR2644579B1 (fr) 1993-06-25
GB9005864D0 (en) 1990-05-09
GB2231957B (en) 1992-12-16
US5061952A (en) 1991-10-29
FR2644579A1 (fr) 1990-09-21
GB2231957A (en) 1990-11-28
DE4008948A1 (de) 1990-09-27

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