JP2005308592A - 変位検出装置 - Google Patents
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- 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
- G01D5/245—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 a variable number of pulses in a train
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/402—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position
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- G—PHYSICS
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- 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
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- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
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- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
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Abstract
【解決手段】 ヘッド1及び2がスケール4から検出した複数種類のアナログ周期性信号は処理回路8及び9に供給される。処理回路8及び処理回路9は、クロック端子10から供給される高速のクロックに同期してアナログ周期性信号をサンプリングしてから、現在の位置データと1回前の位置デートとの差分データΔ1及びΔ2を検出する。切り換えスイッチ11は、処理回路8及び処理回路9が検出した差分データΔ1又は差分データΔ2を選択的に切り換える。切り換えスイッチ11は、切り換え制御器12の制御に基づいて差分データΔ1又は差分データΔ2の切り換えを選択的に行う。切り換え制御器12は、スケール位置検出器7からの検出出力に応じて切り換えスイッチ11の切換を制御する。
【選択図】 図1
Description
λ/4波長板(WP2)と、光検出器(PD1〜4)とからなる。
y=rsinωt
x=rcosωt
の関係があるので、縦軸にsin、横軸にcosの値をとってある。
但し、下位アドレス≧上位アドレス又は
内挿データ=内挿数/4−arctan(上位アドレス/下位アドレス)・内挿数/2π
但し、下位アドレス<上位アドレス
この状態で得られる内挿データは、例えば、1周期移動したとしても、0〜1/4周期のデータが4回出力されるだけなので、1周期分のデータを得るにはオフセットを象限毎に加算すればよい。
Claims (10)
- 所定ピッチの目盛を記録したスケールと、
上記スケールに対して相対変位可能であり上記所定ピッチに応じたアナログの周期性信号を複数種類検出する第1のヘッドと、
上記スケールに対して相対変位可能であり上記所定ピッチに応じたアナログの周期性信号を複数種類検出する第2のヘッドと、
上記第1のヘッドが検出した複数種類のアナログ周期性信号を所定クロックに同期してサンプリングして得た1回前の位置データと現在の位置データとの第1の差分値を検出する第1の処理手段と、
上記第2のヘッドが検出した複数種類のアナログ周期性信号を上記所定クロックに同期してサンプリングして得た1回前の位置データと現在の位置データとの第2の差分値を検出する第2の処理手段と、
上記第1の処理手段が検出した第1の差分値又は上記第2の処理手段が検出した差分値を選択的に切り換える切り換え手段と、
上記第1のヘッド及び第2のヘッドに対して上記スケールが所定の位置に達したことを検出するスケール位置検出手段と、
上記スケール位置検出手段によって上記スケールが上記第1のヘッド及び第2のヘッドに対して所定の位置に達したことが検出されたときには上記切り換え手段に差分値の切り換えを選択的に行わせる切り換え制御手段と、
上記切り換え制御手段によって選択的に切り換えられて出力される第1の差分値又は第2の差分値を加算して位置情報を出力する加算手段と
を備えることを特徴とする変位検出装置。 - 上記第1のヘッドと上記第2のヘッドは、上記スケールの長さよりも短い間隔で離間されていることを特徴とする請求項1記載の変位検出装置。
- 上記スケール位置検出手段が上記第1のヘッド及び第2のヘッドに対して上記スケールが所定の位置に達したことを検出したとき、上記第1の処理手段及び第2の処理手段は第1の差分値及び第2の差分値を検出していることを特徴とする請求項2記載の変位検出装置。
- 所定ピッチの目盛を記録したスケールと、
上記スケールに対して相対変位可能であり上記所定ピッチに応じたアナログの周期性信号を複数種類検出する3個以上のヘッドと、
上記3個以上のヘッドに各々接続し、該3個以上のヘッドが検出した複数種類のアナログ周期性信号を所定クロックに同期してサンプリングして得た1回前の位置データと現在の位置データとの各差分値を検出する3個以上の処理手段と、
上記3個以上の処理手段が検出した各差分値を選択的に切り換える切り換え手段と、
上記3個以上のヘッドの内の隣合う2個のヘッドに対して上記スケールが所定の位置に達したことを検出するスケール位置検出手段と、
上記スケール位置検出手段によって上記スケールが上記隣合う2個のヘッドに対して所定の位置に達したことが検出されたときには上記切り換え手段に差分値の切り換えを選択的に行わせる切り換え制御手段と、
上記切り換え制御手段によって選択的に切り換えられて出力される差分値を加算して位置情報を出力する加算手段と
を備えることを特徴とする変位検出装置。 - 上記3個以上のヘッドの内の隣合う2個のヘッドは、上記スケールの長さよりも短い間隔で離間されていることを特徴とする請求項4記載の変位検出装置。
- 上記スケール位置検出手段が上記隣合う2個のヘッドに対して上記スケールが所定の位置に達したことを検出したとき、上記隣合う2個のヘッドに接続している2個の処理手段は差分値を検出していることを特徴とする請求項5記載の変位検出装置。
- 所定ピッチの目盛を記録した複数m(mは自然数)のスケールと、
上記複数のスケールに対して相対変位可能であり上記所定ピッチに応じたアナログの周期性信号を複数種類検出する複数n(nは自然数)のヘッドと、
上記複数nのヘッドに各々接続し、該nのヘッドが検出した複数種類のアナログ周期性信号を所定クロックに同期してサンプリングして得た1回前の位置データと現在の位置データとの各差分値を検出する複数nの処理手段と、
上記複数nの処理手段が検出した各差分値を選択的に切り換える切り換え手段と、
上記複数nのヘッドの内の隣合う2個のヘッドに対して上記複数mの内のいずれか一つのスケールが所定の位置に達したことを検出するスケール位置検出手段と、
上記スケール位置検出手段によって上記いずれか一つのスケールが上記隣合う2個のヘッドに対して所定の位置に達したことが検出されたときには上記切り換え手段に差分値の切り換えを選択的に行わせる切り換え制御手段と、
上記切り換え制御手段によって選択的に切り換えられて出力される差分値を加算して位置情報を出力する加算手段と
を備えることを特徴とする変位検出装置。 - 上記複数mのスケールは同じ測定長を有し、上記複数nのヘッドの内の隣合う2個のヘッドの間隔は、上記スケールの測定長よりも短い間隔で離間されていることを特徴とする請求項7記載の変位検出装置。
- 上記スケール位置検出手段が上記隣合う2個のヘッドに対して上記いずれかのスケールが所定の位置に達したことを検出したとき、上記隣合う2個のヘッドに接続している2個の処理手段は差分値を検出していることを特徴とする請求項8記載の変位検出装置。
- 上記複数mのスケールの内の隣合う二つのスケールは、上記隣合う2個のヘッドの間隔よりも短い間隔で離間されていることを特徴とする請求項8記載の変位検出装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004127205A JP4751032B2 (ja) | 2004-04-22 | 2004-04-22 | 変位検出装置 |
TW094112270A TWI260395B (en) | 2004-04-22 | 2005-04-18 | Displacement detecting device |
KR1020050032325A KR101117241B1 (ko) | 2004-04-22 | 2005-04-19 | 변위 검출 장치 |
US11/109,911 US7238931B2 (en) | 2004-04-22 | 2005-04-19 | Displacement detection apparatus |
DE102005018807.9A DE102005018807B4 (de) | 2004-04-22 | 2005-04-22 | Verschiebungsermittlungsvorrichtung |
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JP2004127205A JP4751032B2 (ja) | 2004-04-22 | 2004-04-22 | 変位検出装置 |
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JP2005308592A true JP2005308592A (ja) | 2005-11-04 |
JP4751032B2 JP4751032B2 (ja) | 2011-08-17 |
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JP2004127205A Expired - Fee Related JP4751032B2 (ja) | 2004-04-22 | 2004-04-22 | 変位検出装置 |
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US (1) | US7238931B2 (ja) |
JP (1) | JP4751032B2 (ja) |
KR (1) | KR101117241B1 (ja) |
DE (1) | DE102005018807B4 (ja) |
TW (1) | TWI260395B (ja) |
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WO2008026739A1 (fr) | 2006-08-31 | 2008-03-06 | Nikon Corporation | Procédé d'entraînement de corps mobile et système d'entraînement de corps mobile, procédé et appareil de mise en forme de motif, procédé et appareil d'exposition et procédé de fabrication de dispositif |
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DE102005018807B4 (de) | 2015-01-08 |
TW200608051A (en) | 2006-03-01 |
DE102005018807A1 (de) | 2005-11-10 |
US20050236558A1 (en) | 2005-10-27 |
KR101117241B1 (ko) | 2012-03-15 |
JP4751032B2 (ja) | 2011-08-17 |
US7238931B2 (en) | 2007-07-03 |
KR20060047223A (ko) | 2006-05-18 |
TWI260395B (en) | 2006-08-21 |
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