CA2188642A1 - Method and apparatus for measuring the orientation of optical axes - Google Patents
Method and apparatus for measuring the orientation of optical axesInfo
- Publication number
- CA2188642A1 CA2188642A1 CA002188642A CA2188642A CA2188642A1 CA 2188642 A1 CA2188642 A1 CA 2188642A1 CA 002188642 A CA002188642 A CA 002188642A CA 2188642 A CA2188642 A CA 2188642A CA 2188642 A1 CA2188642 A1 CA 2188642A1
- Authority
- CA
- Canada
- Prior art keywords
- axes
- axis
- birefringent
- orientation
- light
- 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
- 230000003287 optical effect Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 230000010287 polarization Effects 0.000 abstract 3
- 238000005259 measurement Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/12—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving photoelectric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/241—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet by photoelastic stress analysis
Abstract
This invention provides an optical and computation system that does not utilize moving parts, which enables the angular orientation of the optical axes on the surface of a birefringent material to be determined and comparably, the orientation of the optical axes within light emerging from that surface. Further, since this invention considers the relative orientations of the preferred axis or axes of polarization within light, this method is also applicable for determining the angular orientation of the preferred axis of polarization of elliptically or linearly polarized light or the orientation of the polarizing axis of the material causing the preferred direction of polarization. For birefringent generated axes, this invention allows for the principal axis to be identified distinctly from the quadrature axis and without ambiguity. This is achieved by consideration of the relative intensities of the light emerging from the birefringent or polarizing material when observed through a plurality of linear or elliptical polarizers whose axes are set at known and distinct orientations to the reference direction of the measurement system, and with the ambiguities in the determination of the principal axis in the birefringent system removed by use of the phase of the interference patterns resulting when the light passing along the principal and quadrature axes within the birefringent material is combined by the linear or elliptical polarizers.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US822095P | 1995-12-05 | 1995-12-05 | |
US60/008,220 | 1995-12-05 | ||
US08/638,218 US5825492A (en) | 1996-04-26 | 1996-04-26 | Method and apparatus for measuring retardation and birefringence |
US08/638,218 | 1996-04-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2188642A1 true CA2188642A1 (en) | 1997-06-06 |
CA2188642C CA2188642C (en) | 2005-12-20 |
Family
ID=26677951
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002188642A Expired - Fee Related CA2188642C (en) | 1995-12-05 | 1996-10-23 | Method and apparatus for measuring the orientation of optical axes |
CA002190203A Expired - Fee Related CA2190203C (en) | 1995-12-05 | 1996-11-13 | Method and apparatus for measuring retardation and birefringence |
CA002190221A Expired - Fee Related CA2190221C (en) | 1995-12-05 | 1996-11-13 | Load meter employing birefringence to measure mechanical loads and stresses |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002190203A Expired - Fee Related CA2190203C (en) | 1995-12-05 | 1996-11-13 | Method and apparatus for measuring retardation and birefringence |
CA002190221A Expired - Fee Related CA2190221C (en) | 1995-12-05 | 1996-11-13 | Load meter employing birefringence to measure mechanical loads and stresses |
Country Status (2)
Country | Link |
---|---|
US (1) | US5917598A (en) |
CA (3) | CA2188642C (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4629869B2 (en) * | 1998-02-20 | 2011-02-09 | ハインズ インスツルメンツ インコーポレイテッド | Birefringence characteristic measuring method and apparatus |
US6697157B2 (en) * | 1999-05-24 | 2004-02-24 | Hinds Instruments | Birefringence measurement |
US6693710B1 (en) | 2000-06-16 | 2004-02-17 | Cambridge Research & Instrumentation Inc. | Polarization imaging system |
JP3679774B2 (en) * | 2002-03-29 | 2005-08-03 | キヤノン株式会社 | Birefringence measuring apparatus and method |
US7233395B2 (en) * | 2003-09-25 | 2007-06-19 | Georgia Tech Research Corporation | Performing retardation measurements |
US7075648B2 (en) * | 2003-09-25 | 2006-07-11 | Georgia Tech Research Corporation | Performing retardation measurements |
US7224457B2 (en) | 2003-09-25 | 2007-05-29 | Georgia Tech Research Corporation | Performing retardation measurements |
WO2005054825A1 (en) * | 2003-12-03 | 2005-06-16 | Pulp And Paper Reseach Institute Of Canada | Circularly polarized light method and device for determining wall thickness and orientations of fibrils of cellulosic fibres |
US9417050B2 (en) * | 2010-12-13 | 2016-08-16 | Paul Scherrer Institut | Tracking type laser interferometer for objects with rotational degrees of freedom |
US10054516B2 (en) * | 2016-08-29 | 2018-08-21 | The United States Of America As Represented By The Adiminstrator Of Nasa | System and method for optical frequency domain reflectometer |
CN113298863B (en) * | 2021-04-14 | 2022-12-09 | 清华大学 | Polarization main shaft direction calibration device and method in polarization image sensor of sub-focal plane |
CN113176032B (en) * | 2021-04-23 | 2022-04-05 | 天津大学 | Pressure measurement device and method based on orthogonal phase rapid demodulation and intensity compensation |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2347666A1 (en) * | 1976-04-09 | 1977-11-04 | France Etat | AUTOMATIC TWO WAVELENGTH PHOTOELASTICIMETER |
JPS58109859A (en) * | 1981-12-24 | 1983-06-30 | Sumitomo Electric Ind Ltd | Voltage and electric field measuring device using light |
US4973163A (en) * | 1988-10-08 | 1990-11-27 | Kanzaki Paper Manufacturing Co., Ltd. | Method for measuring birefringence |
FR2657163B1 (en) * | 1990-01-12 | 1992-05-07 | Bertin & Cie | SENSOR FOR DETECTION AND MEASUREMENT OF THE ROTATION ANGLE OF A LIGHT POLARIZATION PLAN. |
GB2265458A (en) * | 1992-03-28 | 1993-09-29 | Rover Group | Multi-wavelength photoelastic stress analysis |
-
1996
- 1996-10-23 US US08/736,325 patent/US5917598A/en not_active Expired - Fee Related
- 1996-10-23 CA CA002188642A patent/CA2188642C/en not_active Expired - Fee Related
- 1996-11-13 CA CA002190203A patent/CA2190203C/en not_active Expired - Fee Related
- 1996-11-13 CA CA002190221A patent/CA2190221C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2190221C (en) | 2003-05-27 |
CA2190221A1 (en) | 1997-06-06 |
CA2190203A1 (en) | 1997-06-06 |
CA2190203C (en) | 2005-02-08 |
CA2188642C (en) | 2005-12-20 |
US5917598A (en) | 1999-06-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |