US3697180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically recording the hedepolarization ratios of raman bands
Assignee: Jeol Ltd
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Filing: 1970-12-07
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Granted: 1972-10-10
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Expires: 1990-12-07
Abstract
Abstract Two rays of light polarized parallel and perpendicular with respect to a plane are produced from a single ray of light generated by a laser. By alternately illuminating a sample with the said two rays of light, two Raman scattering light rays having different intensities are produced and in turn applied to a monochromator where they are dispersed according to wave length. After dispersion, the rays are detected by a photomultiplier and the resultant signals applied to a division circuit where the depolarization ratio is automatically calculated. This process is repeated for subsequent sets of signals, thereby effecting a continuous operational sequence.
Inventors
- 👤 Hajime Mori
- 👤 Mamoru Irizuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:50
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/21; G01J; G01J3/00; G01J3/28; G01J3/44; G01J4/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
165 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising: A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample; C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating electrical signals indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. an analyzing circuit for providing a signal indicative of the ratio of the intermittent electrical signals resulting from the two differently polarized rays of light; and, H. means for recording the output signals of said detecting means and said analyzing circuit simultaneously.
Claim 2
Independent Claim
165 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising: A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample; C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating electrical signals indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. an analyzing circuit for providing a signal indicative of the ratio of the intermittent electrical signals resulting from the two differently polarized rays of light; and, H. means for recording the output signals of said detecting means and said analyzing circuit simultaneously.
Claim 3
Dependent Claim
19 words
An apparatus according to claim 1 wherein said light source comprises a laser providing a plane polarized monochromatic output.
Claim 4
Dependent Claim
39 words
a control circuit and a circuit means for feeding back the differential voltage observed in the comparing circuit to control the intensity of both electrical signals maintaining the signal based on the parallel polarized incident rays of light constant;
Claim 5
Dependent Claim
39 words
a control circuit and a circuit means for feeding back the differential voltage observed in the comparing circuit to control the intensity of both electrical signals maintaining the signal based on the parallel polarized incident rays of light constant;
Claim 6
Dependent Claim
51 words
circuit means for producing a signal being the difference between the signal voltage of the Raman light resulting from the perpendicular polarized incident rays of light, said signal being indicative of the depolarization ratios; and, H. means for recording the depolarization ratios and the output signal of the detecting means simuLtaneously.
Claim 7
Dependent Claim
51 words
circuit means for producing a signal being the difference between the signal voltage of the Raman light resulting from the perpendicular polarized incident rays of light, said signal being indicative of the depolarization ratios; and, H. means for recording the depolarization ratios and the output signal of the detecting means simuLtaneously.
Claim 8
Independent Claim
143 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising: A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample; C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating an electrical signal indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. an analyzing circuit for providing a signal indicative of the ratio of the intermittent electrical signals supplied thereto comprising:
Claim 9
Independent Claim
143 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising: A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample; C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating an electrical signal indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. an analyzing circuit for providing a signal indicative of the ratio of the intermittent electrical signals supplied thereto comprising:
Claim 10
Independent Claim
192 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample, C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating an electrical signal indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. means for producing a differential signal of said electrical signals; H. means for attenuating the intensity of the incident light polarized parallel to the plane according to said differential signal so as to equalize the intensities of the two Raman light rays; and, I. means for recording the attenuation coefficient of the incident light polarized parallel to the plane and the output signal of said detecting means simultaneously.
Claim 11
Independent Claim
192 words
An apparatus for automatically recording the Raman Spectrum and the depolarization ratios of Raman bands of a sample comprising A. a monochromatic light source; B. means for obtaining two incident rays of light polarized respectively parallel and perpendicular to a reference plane, said means being located in the optical path between said light source and said sample, C. means for alternately illuminating said sample with said two incident rays of light; D. a monochromator for dispersing the resultant scattered Raman light rays; E. means for creating an electrical signal indicative of the intensity of the dispersed Raman light rays; F. detecting means for detecting the intensity of either one of the electrical signals resulting from the two differently polarized incident rays of light; G. means for producing a differential signal of said electrical signals; H. means for attenuating the intensity of the incident light polarized parallel to the plane according to said differential signal so as to equalize the intensities of the two Raman light rays; and, I. means for recording the attenuation coefficient of the incident light polarized parallel to the plane and the output signal of said detecting means simultaneously.
References Cited (Backward Citations)
US3414354A
Cited
US3572938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |