US5479256A
Expired / Lapsed
US
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Transient grating spectroscopy
Assignee: Japan Science and Technology Agency
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Filing: 1993-11-09
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Granted: 1995-12-26
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Expires: 2013-11-09
Abstract
Abstract To derive spectrum information on chemical intermediates in photochemical reactions during transitional periods, a transient grating spectroscopy uses white light as the probe light in the pico-second region and monochromatic light in the microsecond region. According to the procedure, it is possible to analyze the photochemical reaction of thin films and interface layers as a function of time at a high precision.
Inventors
- 👤 Naoto Tamai
- 👤 Takashi Ito
- 👤 Tsuyoshi Asahi
- 👤 Hiroshi Masuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:47
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/1717; G01N21/62; G01N21/63; G01N21/636
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A transient grating spectroscopy method comprising: irradiating a plurality of excitation radiations simultaneously onto a sample to generate resultant interference fringes; irradiating a white probe light onto said interference fringes to generate resultant diffracted probe light; measuring an intensity of said diffracted probe light; and, deriving spectrum information of a chemical intermediate of the sample from said intensity of said diffracted probe light.
Claim 2
Dependent Claim
63 words
A transient grating spectroscopy method comprising: irradiating a plurality of excitation radiations simultaneously onto a sample to generate resultant interference fringes; irradiating a white probe light onto said interference fringes to generate resultant diffracted probe light; measuring an intensity of said diffracted probe light; and, deriving spectrum information of a chemical intermediate of the sample from said intensity of said diffracted probe light.
Claim 3
Dependent Claim
25 words
A method as claimed in claim 1, wherein said white probe light is femto-second white light and said spectrum information is in a pico-second region.
Claim 4
Dependent Claim
22 words
A method as claimed in claim 1, wherein said plurality of excitation radiations are totally reflected from an interface of said sample.
Claim 5
Dependent Claim
25 words
A method as claimed in claim 1, wherein said plurality of excitation radiations and said white probe light are obtained from a same light source.
Claim 6
Dependent Claim
25 words
A method as claimed in claim 2, wherein said plurality of excitation radiations and said white probe light are obtained from a same light source.
Claim 7
Dependent Claim
25 words
A method as claimed in claim 3, wherein said plurality of excitation radiations and said white probe light are obtained from a same light source.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-25 | 1999-06-26 | 1999-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-25 | 2003-06-26 | 2003-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-25 | 2007-06-26 | 2007-12-26 | $7700.00 | Window Closed / Lapsed |