US4798463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrofluorophotometer
Assignee: Hitachi Ltd
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Filing: 1987-07-24
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Granted: 1989-01-17
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Expires: 2007-07-24
Abstract
Abstract This invention is for obtaining ratios of Raman spectrum by using a referential sample representing at least two of Raman spectral lines, and for correcting fluorescence intensities of the sample to measured on the basis of the obtained ratios of Raman spectrum.
Inventors
- 👤 Hiroyuki Koshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/28; G01J3/44; G01J3/4406
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
A spectrofluorophotometer comprising a light source, an excitation side spectroscope for separating a light ray from the light source, a sample cell having a sample to be irradiated with excitation light from the excitation side spectroscope, a fluorescence side spectroscope for separating a fluoroescence generated from the sample by irradiating with the excitation light, detecting means for detecting the intensity of the fluorescence from the fluorescence side spectroscope, and calculation means for processing signals from the detecting means, wherein when a standard sample representing at least two Raman spectral lines is disposed in the sample cell, said detecting means detects the intensity for each Raman spectral line and provides output signals thereof, the calculation means including means for obtaining a ratio of the Raman spectrum in accordance with the at least two Raman spectral lines and for calculating a correction coefficient in accordance therewith, the calculating means further including means for correcting the intensity of the fluorescence detected by the detecting means when a sample to be measured is provided in the sample cell in accordance with the correction coefficient of the ratio of the Raman spectrum.
Claim 2
Dependent Claim
187 words
A spectrofluorophotometer comprising a light source, an excitation side spectroscope for separating a light ray from the light source, a sample cell having a sample to be irradiated with excitation light from the excitation side spectroscope, a fluorescence side spectroscope for separating a fluoroescence generated from the sample by irradiating with the excitation light, detecting means for detecting the intensity of the fluorescence from the fluorescence side spectroscope, and calculation means for processing signals from the detecting means, wherein when a standard sample representing at least two Raman spectral lines is disposed in the sample cell, said detecting means detects the intensity for each Raman spectral line and provides output signals thereof, the calculation means including means for obtaining a ratio of the Raman spectrum in accordance with the at least two Raman spectral lines and for calculating a correction coefficient in accordance therewith, the calculating means further including means for correcting the intensity of the fluorescence detected by the detecting means when a sample to be measured is provided in the sample cell in accordance with the correction coefficient of the ratio of the Raman spectrum.
Claim 3
Dependent Claim
12 words
A spectrofluorophotometer according to claim 1, wherein the standard sample is benzene.
Claim 4
Dependent Claim
35 words
A spectrofluorophotometer according to claim 1, wherein the calculating means calculates ratios of area integrating values of the at least two Raman spectral lines of the Raman spectrum as the ratios of the Raman spectrum.
Claim 5
Dependent Claim
26 words
A spectrofluorophotometer according to claim 1, wherein the standard sample representing at least to Raman spectral lines provides an intensity therefor which is almost the same.
Claim 6
Dependent Claim
70 words
A spectrofluorophotometer according to claim 1, wherein the detecting means provides analogue output signals, and further comprising A/D converter means for converting the analogue output signals from the detecting means to digital signals, the calculation means including processing means for arithmetically processing the digital signals from the A/D converter means, and pulse motor means coupled to the calculation means for driving the excitation side spectroscope and the fluorescence side spectroscope.
Claim 7
Dependent Claim
12 words
A spectrofluorophotometer according to claim 5, wherein the standard sample is benzene.
Claim 8
Dependent Claim
35 words
A spectrofluorophotometer according to claim 5, wherein the calculating means calculates ratios of area integrating values of the at least two Raman spectral lines of the Raman spectrum as the ratios of the Raman spectrum.
Claim 9
Dependent Claim
26 words
A spectrofluorophotometer according to claim 5, wherein the standard sample representing at least two Raman spectral lines provides an intensity therefor which is almost the same.
References Cited (Backward Citations)
DE3623052A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |