JP2001513899A - 回折測距システム用可変ピッチ格子 - Google Patents
回折測距システム用可変ピッチ格子Info
- Publication number
- JP2001513899A JP2001513899A JP53250099A JP53250099A JP2001513899A JP 2001513899 A JP2001513899 A JP 2001513899A JP 53250099 A JP53250099 A JP 53250099A JP 53250099 A JP53250099 A JP 53250099A JP 2001513899 A JP2001513899 A JP 2001513899A
- Authority
- JP
- Japan
- Prior art keywords
- grating
- diffraction
- pitch
- distance
- target
- 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.)
- Granted
Links
Classifications
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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
- G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1828—Diffraction gratings having means for producing variable diffraction
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1866—Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Optical Distance (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Electron Beam Exposure (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.可変ピッチ格子と、 前記可変ピッチ格子により形成される回折像の受像器とを有し、 標的の距離を測定する標的測定システム。 2.可変ピッチ格子がピッチを連続的に変える、請求項1記載の標的測定システ ム。 3.格子ピッチの連続的変化が線形である、請求項2記載の標的測定システム。 4.回折距離計の受像器内の遠近短縮を回折格子を使用して克服する手段。 5.回折格子が可変ピッチ格子である、請求項4記載の受像器内の遠近短縮を克 服する手段。 6.回折距離計において、任意の標的距離に対する任意の変位により受像器内の 高次回折像がその関連する0次像から分離されるピッチの変動を有するチャープ 回折格子。 7.請求項6記載の回折距離計において、ピッチの変動が連続的に変化するチャ ープ回折格子。 8.請求項7記載の回折距離計において、ピッチの変動が線形であるチャープ回 折格子。 9.請求項6記載の回折距離計において、ピッチの変動が平面回折格子アセンブ リからなる複合格子におけるように不連続ステップで生じるチャープ回折格子。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3411296P | 1996-12-30 | 1996-12-30 | |
US60/034,112 | 1996-12-30 | ||
PCT/US1997/023841 WO1999044013A1 (en) | 1996-12-30 | 1997-12-29 | Variable pitch grating for diffraction range finding system |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2001513899A true JP2001513899A (ja) | 2001-09-04 |
JP2001513899A5 JP2001513899A5 (ja) | 2005-09-08 |
JP3902796B2 JP3902796B2 (ja) | 2007-04-11 |
Family
ID=21874378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53250099A Expired - Fee Related JP3902796B2 (ja) | 1996-12-30 | 1997-12-29 | 回折測距システム用可変ピッチ格子 |
Country Status (7)
Country | Link |
---|---|
US (1) | US6490028B1 (ja) |
EP (1) | EP0963541B1 (ja) |
JP (1) | JP3902796B2 (ja) |
CA (1) | CA2277211C (ja) |
DE (1) | DE69723110T2 (ja) |
ES (1) | ES2196397T3 (ja) |
WO (1) | WO1999044013A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011209262A (ja) * | 2010-03-26 | 2011-10-20 | Ind Technol Res Inst | 調整式レンジファインダー及びその距離測定方法 |
WO2012063463A1 (ja) * | 2010-11-09 | 2012-05-18 | パナソニック株式会社 | 距離計測装置および距離計測方法 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6603561B2 (en) | 2001-02-20 | 2003-08-05 | Thomas D. Ditto | Chromatic diffraction range finder |
US20030002043A1 (en) | 2001-04-10 | 2003-01-02 | Kla-Tencor Corporation | Periodic patterns and technique to control misalignment |
US20060056028A1 (en) * | 2004-09-13 | 2006-03-16 | Wildnauer Kenneth R | Apodized diffraction grating with improved dynamic range |
US8903670B2 (en) * | 2005-07-13 | 2014-12-02 | Venkata Guruprasad | Distance-dependent spectra with uniform sampling spectrometry |
US20100110445A1 (en) * | 2008-09-05 | 2010-05-06 | 3Dewitt, Llc | Slit aperture for diffraction range finding system and method for using the slit aperture to form a focused image |
US8520191B2 (en) * | 2008-09-05 | 2013-08-27 | 3Dewitt, Llc | Slit aperture for diffraction range finding system |
TW201115183A (en) * | 2009-10-20 | 2011-05-01 | Ind Tech Res Inst | Stereovision system and calculation method for the distance between object and diffractive optical element |
CN102221340A (zh) * | 2010-04-19 | 2011-10-19 | 财团法人工业技术研究院 | 可调式影像判距装置及方法 |
CN106104318B (zh) * | 2014-04-09 | 2019-05-03 | 拉姆伯斯公司 | 低功率图像改变检测器 |
JP2016150081A (ja) * | 2015-02-17 | 2016-08-22 | ソニー株式会社 | 光学ユニット、測定システムおよび測定方法 |
GB201610647D0 (en) | 2016-06-17 | 2016-08-03 | Univ York | Improved sensor and associated methods |
US10021372B2 (en) * | 2016-09-16 | 2018-07-10 | Qualcomm Incorporated | Systems and methods for improved depth sensing |
CN110118971B (zh) * | 2019-04-26 | 2020-12-18 | 华中科技大学 | 基于光栅多级衍射ccd分段复用的激光三角测距装置及方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4678324A (en) * | 1985-12-04 | 1987-07-07 | Thomas De Witt | Range finding by diffraction |
JP2619566B2 (ja) * | 1990-11-20 | 1997-06-11 | オ−クマ株式会社 | 光学式位置検出器 |
US5227625A (en) * | 1992-09-16 | 1993-07-13 | International Business Machines Corporation | Retro-reflective variable-pitch diffraction grating for use in a rotary actuator disk file |
US5422723A (en) * | 1992-09-21 | 1995-06-06 | Texas Instruments Incorporated | Diffraction gratings for submicron linewidth measurement |
US5349183A (en) * | 1993-07-12 | 1994-09-20 | Rockwell International Corporation | Diffraction grating rotary speed sensor having a circumferentially variable pitch diffraction grating |
-
1997
- 1997-12-29 EP EP97955059A patent/EP0963541B1/en not_active Expired - Lifetime
- 1997-12-29 DE DE69723110T patent/DE69723110T2/de not_active Expired - Lifetime
- 1997-12-29 WO PCT/US1997/023841 patent/WO1999044013A1/en active IP Right Grant
- 1997-12-29 ES ES97955059T patent/ES2196397T3/es not_active Expired - Lifetime
- 1997-12-29 CA CA002277211A patent/CA2277211C/en not_active Expired - Fee Related
- 1997-12-29 US US09/331,348 patent/US6490028B1/en not_active Expired - Fee Related
- 1997-12-29 JP JP53250099A patent/JP3902796B2/ja not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011209262A (ja) * | 2010-03-26 | 2011-10-20 | Ind Technol Res Inst | 調整式レンジファインダー及びその距離測定方法 |
WO2012063463A1 (ja) * | 2010-11-09 | 2012-05-18 | パナソニック株式会社 | 距離計測装置および距離計測方法 |
US9121702B2 (en) | 2010-11-09 | 2015-09-01 | Panasonic Corporation | Distance measurement apparatus and distance measurement method |
JP5833546B2 (ja) * | 2010-11-09 | 2015-12-16 | パナソニック株式会社 | 距離計測装置および距離計測方法 |
Also Published As
Publication number | Publication date |
---|---|
CA2277211A1 (en) | 1999-09-02 |
ES2196397T3 (es) | 2003-12-16 |
DE69723110D1 (de) | 2003-07-31 |
EP0963541A4 (en) | 2001-07-25 |
EP0963541B1 (en) | 2003-06-25 |
DE69723110T2 (de) | 2004-05-06 |
CA2277211C (en) | 2008-10-07 |
US6490028B1 (en) | 2002-12-03 |
WO1999044013A1 (en) | 1999-09-02 |
EP0963541A1 (en) | 1999-12-15 |
JP3902796B2 (ja) | 2007-04-11 |
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