JP5142502B2 - 位置測定装置 - Google Patents
位置測定装置 Download PDFInfo
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- JP5142502B2 JP5142502B2 JP2006243505A JP2006243505A JP5142502B2 JP 5142502 B2 JP5142502 B2 JP 5142502B2 JP 2006243505 A JP2006243505 A JP 2006243505A JP 2006243505 A JP2006243505 A JP 2006243505A JP 5142502 B2 JP5142502 B2 JP 5142502B2
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- 230000003287 optical effect Effects 0.000 claims description 43
- 238000005259 measurement Methods 0.000 claims description 30
- 230000010363 phase shift Effects 0.000 claims description 11
- 230000002452 interceptive effect Effects 0.000 claims description 9
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- 238000011156 evaluation Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000013598 vector Substances 0.000 description 14
- 230000035945 sensitivity Effects 0.000 description 13
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- 230000001427 coherent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02015—Interferometers characterised by the beam path configuration
- G01B9/02017—Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations
- G01B9/02019—Interferometers characterised by the beam path configuration with multiple interactions between the target object and light beams, e.g. beam reflections occurring from different locations contacting different points on same face of object
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02015—Interferometers characterised by the beam path configuration
- G01B9/02022—Interferometers characterised by the beam path configuration contacting one object by grazing incidence
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02015—Interferometers characterised by the beam path configuration
- G01B9/02027—Two or more interferometric channels or interferometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B2290/00—Aspects of interferometers not specifically covered by any group under G01B9/02
- G01B2290/30—Grating as beam-splitter
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Transform (AREA)
Description
SP:位置測定装置の信号周期
ここで、感度ベクトル
dA1:第一の走査格子の格子定数
dA2:第二の走査格子の格子定数
dM :測定尺の格子定数
この実施構成に関する第一の一次的な位置数値ζ1 の感度ベクトルは、図6に図示されている。それに対応する第二の一次的な位置数値の感度ベクトルは、構造的な制限にもとづき、又もやそれに対して鏡面対称の方向を向いている。
2 回折格子
3 測定尺
4 +1次の回折次数の光束
4’ −1次の回折次数の光束
5,6 部分光束
7 走査板
8,9 第一の偏向構造
8’,9’ 偏向格子
10 測定尺
10,11 部分光束
12,13 ミラー
14,15 第二の偏向構造
16,17 λ/4位相板
18,19 部分光束
20 光束
21 回折格子
20.1,20.2,20.3 走査システム
22a,22b,22c,22d,22e,22f 光線
23a,23b,23c 偏光子
24a,24b,24c 検出器
30 測定尺
31,32,33,34,32’,33’,34’ 部分光束
35,35’ 第二の走査格子(混合格子)
36a,36b,36c 光束
37a,37b,37c 光検出器
70 走査板
110 光束
130 第一の回折格子
X,Y,Z 物体の移動方向
Z0 公称間隔
Claims (9)
- 二つの互いに相対的に動く物体の位置を検出するための位置測定装置であって、
両物体の一方と接続された測定尺(10,3,30)と、
両物体の他方と接続された、測定尺(10,3,30)を走査するための少なくとも一つの走査システム(20.1,20.2,20.3)であって、この走査システム(20.1,20.2,20.3)は、この走査システムによって、物体の少なくとも一つの横の移動方向(X,Y)と垂直の移動方向(Z)に沿った位置数値を同時に求めることが可能であるように構成されている走査システムと、
を備え、
走査システム(20.1,20.2,20.3)の側では、光源から出射された光束(1)が、走査板(7)に配置された第一の回折格子(2)によって、異なる回折次数の二つの部分光束(4,4’)に分割され、次に、それらの部分光束(4,4’)が、それぞれ第二の回折格子として構成された反射式測定尺(3)に到達し、測定尺(3)によって、走査板(7)の方向に反射されるとともに、異なる回折次数の二つの部分光束(5,6)に更に分割され、それらの部分光束(5,6)が、走査板(7)内で偏向及び反射されて、再び測定尺(3)の所に到達して重なり合った後、測定尺(3)によって、一つの光束(20)に纏められて、走査板(7)の方向に反射され、その光束(20)が、走査板(7)に配置された第三の回折格子(21)によって、少なくとも三つの個別の光線(22a,22b,22c)に分割されるか、或いは
光源から出射された光束(110)が、走査板(70)に配置された第一の回折格子(130)によって、異なる回折次数の三つの部分光束(31,32,32’)に分割され、次に、それらの部分光束(31,32,32’)が、それぞれ第二の回折格子として構成された反射式測定尺(30)に到達し、測定尺(30)によって、異なる回折次数の部分光束(33,33’;34,34’)として走査板(70)の方向に反射され、それらの部分光束(33,33’;34,34’)が、走査板(70)に配置された第三の回折格子(35,35’)の所に到達して重なり合うとともに、第三の回折格子(35,35’)によって、少なくとも三つの個別の光線(36a,36b,36c)に分割され、
これらの三つの個別の光線(22a,22b,22c;36a,36b,36c)が、それぞれ検出器(24a,24b,24c;37a,37b,37c)によって検出されて、一つのグループの位相のずれた電気信号S A0° ,S A120° ,S A240° ,S B0° ,S B120° ,S B240° に変換される、
位置測定装置。 - 各走査光路の両部分光束が、横の移動方向(X)に対して垂直な面(YZ)に関して非対称に延びており、
第二の光路が、横の移動方向(X)に対して垂直な面(YZ)面に関して、第一の光路に対して鏡面対称に延びており、
各走査光路の両部分光束が、測定尺(3,10,30)において、異なる回折次数の回折を受ける、
請求項2に記載の位置測定装置。 - 両グループの位相のずれた信号の補間から、横方向(X)と垂直方向(Z)の位置数値を検出することを可能とする一次的な位置数値を求めるための評価手段が更に配備されている請求項3に記載の位置測定装置。
- 横方向(X)と垂直方向(Z)の位置数値を検出することを可能とする一次的な位置数値の場合によっては起こる補間誤差を補償するための補償手段が更に配備されている請求項4に記載の位置測定装置。
- 当該の各走査光路には、干渉し合う部分光束の各々に対して、同じ光路長を保証するための光学的な手段が配置されている請求項2に記載の位置測定装置。
- 各走査光路の両部分光束が、測定尺(3,10,30)において、+1次又は−1次の回折次数の回折を受ける請求項3に記載の位置測定装置。
- 測定尺(3,10,30)が二次元の交差格子を有し、
互いに同一線上に無い位置に置かれた三つの走査システム(20.1,20.2,20.3)が配備されており、これら三つの走査システム(20.1,20.2,20.3)の位置数値の組み合わせから、六つの空間的な自由度のすべてにおける両物体の動きを検出する請求項1から7までのいずれか一つに記載の位置測定装置。 - 両物体が、半導体製造装置の構成部品である請求項8に記載の位置測定装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005043569A DE102005043569A1 (de) | 2005-09-12 | 2005-09-12 | Positionsmesseinrichtung |
DE102005043569.6 | 2005-09-12 |
Publications (2)
Publication Number | Publication Date |
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JP2007078687A JP2007078687A (ja) | 2007-03-29 |
JP5142502B2 true JP5142502B2 (ja) | 2013-02-13 |
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Application Number | Title | Priority Date | Filing Date |
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JP2006243505A Active JP5142502B2 (ja) | 2005-09-12 | 2006-09-08 | 位置測定装置 |
Country Status (6)
Country | Link |
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US (1) | US7573581B2 (ja) |
EP (2) | EP2660566B1 (ja) |
JP (1) | JP5142502B2 (ja) |
CN (1) | CN1932435B (ja) |
DE (1) | DE102005043569A1 (ja) |
ES (2) | ES2606318T3 (ja) |
Families Citing this family (138)
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DE10147987B9 (de) * | 2001-09-28 | 2006-05-24 | Osram Opto Semiconductors Gmbh | Optoelektronisches Bauelement |
DE10333772A1 (de) * | 2002-08-07 | 2004-02-26 | Dr. Johannes Heidenhain Gmbh | Interferenzielle Positionsmesseinrichtung |
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JP2005326232A (ja) * | 2004-05-13 | 2005-11-24 | Sendai Nikon:Kk | 光電式エンコーダ |
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CN1932435B (zh) | 2010-09-01 |
US7573581B2 (en) | 2009-08-11 |
EP1762828B1 (de) | 2014-11-19 |
ES2525203T3 (es) | 2014-12-18 |
EP1762828A2 (de) | 2007-03-14 |
EP2660566A3 (de) | 2014-02-19 |
US20070058173A1 (en) | 2007-03-15 |
JP2007078687A (ja) | 2007-03-29 |
DE102005043569A1 (de) | 2007-03-22 |
EP1762828A3 (de) | 2013-02-27 |
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