INSTRUMENT FOR MEASURING PHYSICAL PROPERTY OF SAMPLE

Title:

INSTRUMENT FOR MEASURING PHYSICAL PROPERTY OF SAMPLE

Document Type and Number:

WIPO Patent Application WO/2001/061323

Kind Code:

A1

Abstract:

An instrument for measuring a physical property of a sample by optically detecting the response of the sample to projection of an ultra-short optical pulse. A Sagnac common-path optical interferometer for measuring a physical property at a vertical input angle is provided. The interferometer is a one-arm Sagnac type and has two beam splitters. A sample (14) is excited by an ultra-short optical pulse, and changes of the strength and phase of the optical beam caused by the excitation are measured. Therefore it is possible to measure a physical property in a wide range such as the thickness of an object, a sound speed, or a thermal property.

Inventors:

WRIGHT OLIVER (JP)
HURLEY DAVID (US)
MATSUDA OSAMU (JP)

Application Number:

PCT/JP2000/004033

Publication Date:

August 23, 2001

Filing Date:

June 21, 2000

Export Citation:

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Assignee:

JAPAN SCIENCE & TECH CORP (JP)
WRIGHT OLIVER (JP)
HURLEY DAVID (US)
MATSUDA OSAMU (JP)

International Classes:

G01B11/02; G01B11/06; G01B9/02; G01D5/26; G01J11/00; G01N21/45; G01N25/16; G01N29/00; G01J9/02; (IPC1-7): G01N21/45; G01B11/06

Foreign References:

JPH05172739A	1993-07-09
JPH049641A	1992-01-14
JPH11511240A	1999-09-28

Other References: