KR101085014B1 - 광학식 표면 측정 장치 및 방법 - Google Patents
광학식 표면 측정 장치 및 방법 Download PDFInfo
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- KR101085014B1 KR101085014B1 KR1020090017175A KR20090017175A KR101085014B1 KR 101085014 B1 KR101085014 B1 KR 101085014B1 KR 1020090017175 A KR1020090017175 A KR 1020090017175A KR 20090017175 A KR20090017175 A KR 20090017175A KR 101085014 B1 KR101085014 B1 KR 101085014B1
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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
- G01B9/02055—Reduction or prevention of errors; Testing; Calibration
- G01B9/02062—Active error reduction, i.e. varying with time
- G01B9/02067—Active error reduction, i.e. varying with time by electronic control systems, i.e. using feedback acting on optics or light
- G01B9/02068—Auto-alignment of optical elements
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
- G01B11/0608—Height gauges
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/2441—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures using interferometry
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
-
- 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
-
- 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
- G01B9/02055—Reduction or prevention of errors; Testing; Calibration
- G01B9/02062—Active error reduction, i.e. varying with time
- G01B9/02063—Active error reduction, i.e. varying with time by particular alignment of focus position, e.g. dynamic focussing in optical coherence tomography
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- Radiology & Medical Imaging (AREA)
- Automation & Control Theory (AREA)
- Optics & Photonics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Description
Claims (11)
- 측정대상물(1) 표면에 레이저광을 조사하고 상기 표면에서 반사된 레이저광을 입력받아 표면과의 거리에 따른 간섭신호를 출력하는 간섭계(13)와;상기 간섭계(13)에서 조사된 레이저광을 투과시켜 측정대상물 표면의 측정지점에 초점을 형성하기 위한 오브젝트 렌즈(3)와;측정대상물(1)의 위치 조정을 위한 전동스테이지(2)와;측정대상물 표면에서 반사된 레이저광을 분리하는 빔스플리터(4)와;상기 빔스플리터(4)에서 분리된 레이저광을 집광시키는 콜리매터 렌즈(5)와;상기 콜리매터 렌즈(5)에 의해 집광된 레이저광을 통과시켜 비점수차를 발생시키는 비점수차 렌즈(6)와;상기 비점수차 렌즈(6)를 통과한 레이저광을 입력받아 측정대상물 표면과의 거리에 따른 FE(Focus Error) 신호를 출력하는 FE 신호출력부와;상기 간섭계(13)로부터 출력되는 간섭신호와 상기 FE 신호출력부에서 출력되는 FE 신호를 입력받아 이를 기초로 거리변화를 연산하고 그로부터 표면 단차를 포함하는 표면 상태 정보를 획득하는 제어부(12);를 포함하는 광학식 표면 측정 장치.
- 청구항 1에 있어서,상기 FE 신호출력부는,상기 측정대상물 표면과의 거리에 따른 광량을 검출하는 PSD(Position Seinsitive Detector)와;상기 PSD에서 검출된 광량 신호를 FE 신호로 변환시키는 연산자(8,9,10)와;상기 연산자(8,9,10)를 통해 출력되는 아날로그 FE 신호를 디지털 신호로 변환하여 출력하는 A/D 컨버터(11);를 포함하는 것을 특징으로 하는 광학식 표면 측정 장치.
- 청구항 2에 있어서,상기 PSD는 광량 검출을 위한 4분할 포토다이오드(4D-PD)(7)를 포함하고, 상기 4분할 포토다이오드에서 분할된 포토다이오드 영역별로 출력되는 신호가 상기 연산자(8,9,10)에 의해 조합되어 FE 신호를 생성하는 것을 특징으로 하는 광학식 표면 측정 장치.
- 청구항 2에 있어서,상기 PSD는 4분할 가능한 포토다이오드 어레이 또는 CCD 어레이를 포함하고, 4분할된 각 영역의 소자로부터 출력되는 신호가 상기 연산자(8,9,10)에 의해 조합되어 FE 신호를 생성하는 것을 특징으로 하는 광학식 표면 측정 장치.
- 청구항 1에 있어서,상기 제어부(12)로부터 출력되는 표면 상태 정보를 표시하여 주는 디스플레이(14)를 더 포함하는 것을 특징으로 하는 광학식 표면 측정 장치.
- (a) 간섭계로부터 전동스테이지에 고정된 측정대상물 표면 내 기준점으로 레이저광이 조사되는 단계와;(b) 오브젝트 렌즈를 통해 측정대상물 표면의 기준점에 레이저광의 초점이 형성된 상태에서 상기 전동스테이지에 고정된 측정대상물을 광축 방향으로 이동시키는 단계와;(c) 측정대상물의 이동 동안 상기 표면에서 반사된 레이저광이 빔스플리터를 거쳐 간섭계로 입력되고, 동시에 상기 빔스플리터에서 분리된 레이저광이 콜리매터 렌즈 및 비점수차 렌즈를 통과하여 FE 신호출력부로 입력되는 단계와;(d) 표면상태 획득을 위한 제어부가 상기 간섭계에서 표면과의 거리에 따른 간섭신호와 상기 FE 신호출력부에서 표면과의 거리에 따른 FE(Focus Error) 신호를 동시에 입력받아 두 신호로부터 참조데이터를 획득하여 저장하는 단계와;(e) 레이저광을 조사하되, 측정대상물을 광축 방향의 수직방향으로 이동시켜 표면 내에서의 측정지점을 이동하는 동시에 상기 제어부가 간섭계의 간섭신호와 FE 신호출력부의 FE 신호를 입력받아 상기 간섭신호 및 FE 신호, 상기 참조데이터를 기초로 거리변화를 연산하고 그로부터 표면 단차를 포함하는 표면 상태 정보를 획득하는 단계;를 포함하는 광학식 표면 측정 방법.
- 청구항 6에 있어서,상기 제어부는 상기 간섭계의 간섭신호로부터 얻어지는 일정 주기를 갖는 거리변화 신호를 상기 FE 신호와 중첩시켜 두 신호값이 일치하는 값들을 상기 참조데이터로 획득하는 것을 특징으로 하는 광학식 표면 측정 방법.
- 청구항 7에 있어서,상기 두 신호값이 일치하는 값들은 상기 거리변화 신호의 각 주기마다 얻어지는 것을 특징으로 하는 광학식 표면 측정 방법.
- 청구항 7에 있어서,상기 제어부는 (d) 단계에서 상기 두 신호값이 일치하는 값들을 임계값으로 사용하여 FE 신호값을 임계값들과 비교한 후 특정 상, 하 임계값 사이에 위치됨을 판별하여, 임계값 사이의 각 구간별로 미리 정해진 n 값들 중 판별된 상, 하 임계값 사이 구간에 상응하는 n 값을 산출하고, 산출된 상기 n 값과 상기 간섭신호로부터 얻은 거리변화값을 이용하여 실제 거리변화값을 연산하는 것을 특징으로 하는 광학식 표면 측정 방법.
- 청구항 9에 있어서,상기 n 값과 상기 간섭신호로부터 얻은 거리변화값을 이용하여 하기 식(1)로부터 실제 거리변화값을 연산하는 것을 특징으로 하는 광학식 표면 측정 방법.식(1) : 실제 거리변화값 = λ/4×n + 간섭신호의 거리변화값
- 청구항 6에 있어서,측정자로 하여금 측정결과를 확인할 수 있도록 디스플레이에 의해 상기 제어부로부터 출력되는 표면 상태 정보가 표시되는 단계를 더 포함하는 것을 특징으로 하는 광학식 표면 측정 방법.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090017175A KR101085014B1 (ko) | 2009-02-27 | 2009-02-27 | 광학식 표면 측정 장치 및 방법 |
| US12/561,671 US8289525B2 (en) | 2009-02-27 | 2009-09-17 | Optical surface measuring apparatus and method |
| GB0918220A GB2468177B (en) | 2009-02-27 | 2009-10-16 | Optical surface measuring apparatus and method |
| JP2009240766A JP2010204085A (ja) | 2009-02-27 | 2009-10-19 | 光学式表面測定装置及び方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090017175A KR101085014B1 (ko) | 2009-02-27 | 2009-02-27 | 광학식 표면 측정 장치 및 방법 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20100098152A KR20100098152A (ko) | 2010-09-06 |
| KR101085014B1 true KR101085014B1 (ko) | 2011-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| KR1020090017175A Expired - Fee Related KR101085014B1 (ko) | 2009-02-27 | 2009-02-27 | 광학식 표면 측정 장치 및 방법 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8289525B2 (ko) |
| JP (1) | JP2010204085A (ko) |
| KR (1) | KR101085014B1 (ko) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6438209B2 (ja) * | 2014-04-07 | 2018-12-12 | 株式会社荏原製作所 | 検査装置において撮像装置用のタイミング信号を生成するための制御装置、撮像装置にタイミング信号を送出する方法 |
| JP6482888B2 (ja) * | 2015-02-05 | 2019-03-13 | 中国塗料株式会社 | 粗面の摩擦抵抗予測方法および表面性能評価装置 |
| KR101867316B1 (ko) * | 2016-07-28 | 2018-07-19 | 한국기계연구원 | 초점위치 오차 검출 장치 및 방법 |
| CN109269417A (zh) * | 2018-07-25 | 2019-01-25 | 孝感锐创机械科技有限公司 | 一种基于反射镜的非接触式振动位移传感器 |
| CN109141223B (zh) * | 2018-09-25 | 2020-06-16 | 成都飞机工业(集团)有限责任公司 | 一种基于psd的激光干涉仪光路高效精确校准方法 |
| CN114942079B (zh) * | 2022-05-05 | 2024-08-30 | 西安应用光学研究所 | 菲索干涉型波长计中柱面成像压缩系统的匹配调试方法 |
| CN118032288B (zh) * | 2024-02-06 | 2025-01-07 | 广州德擎光学科技有限公司 | 光学标定方法及相关装置 |
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| JPH11175987A (ja) | 1997-12-09 | 1999-07-02 | Ricoh Co Ltd | 光ディスク原盤露光機のフォーカス光学系 |
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| JPS6318207A (ja) * | 1986-07-11 | 1988-01-26 | Canon Inc | 面形状測定装置 |
| DE4219311C2 (de) * | 1991-06-13 | 1996-03-07 | Sony Magnescale Inc | Verschiebungsdetektor |
| US5208451A (en) * | 1992-05-04 | 1993-05-04 | Zygo Corporation | Method and apparatus for automated focusing of an interferometric optical system |
| JPH1068616A (ja) * | 1996-08-28 | 1998-03-10 | Fuji Xerox Co Ltd | 形状計測装置 |
| US8353948B2 (en) * | 1997-01-24 | 2013-01-15 | Celonova Stent, Inc. | Fracture-resistant helical stent incorporating bistable cells and methods of use |
| JP3401783B2 (ja) * | 1998-06-23 | 2003-04-28 | 株式会社高岳製作所 | 表面形状計測装置 |
| US6677565B1 (en) * | 1998-08-18 | 2004-01-13 | Veeco Tucson Inc. | High speed autofocus and tilt for an optical imaging system |
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| JP2000221013A (ja) * | 1999-02-03 | 2000-08-11 | Fuji Xerox Co Ltd | 干渉計測方法および干渉計測装置 |
| JP4154713B2 (ja) * | 2003-06-30 | 2008-09-24 | 関東自動車工業株式会社 | 車両用シート |
| AU2007227000A1 (en) * | 2006-03-20 | 2007-09-27 | Xtent, Inc. | Apparatus and methods for deployment of linked prosthetic segments |
| US7247827B1 (en) * | 2006-05-31 | 2007-07-24 | Academia Sinica | System for measurement of the height, angle and their variations of the surface of an object |
| EP1992905A1 (en) * | 2007-05-16 | 2008-11-19 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Optical sensor with tilt error correction |
| JP2009258022A (ja) * | 2008-04-18 | 2009-11-05 | Sony Corp | 変位検出装置 |
-
2009
- 2009-02-27 KR KR1020090017175A patent/KR101085014B1/ko not_active Expired - Fee Related
- 2009-09-17 US US12/561,671 patent/US8289525B2/en not_active Expired - Fee Related
- 2009-10-19 JP JP2009240766A patent/JP2010204085A/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117908A (ja) | 1984-07-05 | 1986-01-25 | Canon Inc | 3次元形状測定装置 |
| JPS63317705A (ja) | 1987-06-19 | 1988-12-26 | Sanyo Electric Co Ltd | 形状測定機 |
| JPH11175987A (ja) | 1997-12-09 | 1999-07-02 | Ricoh Co Ltd | 光ディスク原盤露光機のフォーカス光学系 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20100220337A1 (en) | 2010-09-02 |
| JP2010204085A (ja) | 2010-09-16 |
| US8289525B2 (en) | 2012-10-16 |
| KR20100098152A (ko) | 2010-09-06 |
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