US4988872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron probe microanalyzer having wavelength-dispersive x-ray spectrometer and energy-dispersive x-ray spectrometer
Assignee: Jeol Ltd
•
Filing: 1989-07-27
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Granted: 1991-01-29
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Expires: 2009-07-27
Abstract
Abstract An electron probe microanalyzer equipped with a wavelength-dispersive x-ray spectrometer and also with an energy-dispersive x-ray spectrometer. X-rays emanating from the same sample region are detected by these two spectrometers, and spectra are created from the detected x-rays. Cursors which can be moved at will are superimposed on the spectra. One of the cursors is moved in relation to the other. That is, when one cursor is moved into the position of a desired wavelength or energy, the other is moved into the position of the corresponding energy or wavelength. The use of the cursors enables one to precisely and easily find the existence of a certain element in the sample region from the spectra obtained by the two x-ray spectrometers.
Inventors
- 👤 Yoshitaka Nagatsuka
- 👤 Masayuki Ohtsuki
- 👤 Masaki Saito
- 👤 Koji Yoshida
- 👤 Kazuyasu Kawabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:12
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/225; G01N23/2251; G01N23/2252
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
An electron probe microanalyzer comprising: a means for irradiating the surface of a specimen with an electron beam; a wavelength-dispersive x-ray spectrometer and an energy-dispersive x-ray spectrometer which detect x-rays emanating from the specimen by the irradiation; display means on which first and second spectrum being two kinds of spectra created from the x-rays emitted from the same sample region under investigation and detected by the spectrometers are displayed; means for superimposing a first and a second cursor on the first and second spectrum respectively displayed on the display means to indicate the positions of the energies or wavelengths of characteristic xrays; a means for manually moving the position of the first cursor; and a means for automatically moving the second cursor in relation to the position indicated by the first cursor such that the energy indicated by one of the cursors corresponds to the wavelength indicated by the other.
Claim 2
Dependent Claim
150 words
An electron probe microanalyzer comprising: a means for irradiating the surface of a specimen with an electron beam; a wavelength-dispersive x-ray spectrometer and an energy-dispersive x-ray spectrometer which detect x-rays emanating from the specimen by the irradiation; display means on which first and second spectrum being two kinds of spectra created from the x-rays emitted from the same sample region under investigation and detected by the spectrometers are displayed; means for superimposing a first and a second cursor on the first and second spectrum respectively displayed on the display means to indicate the positions of the energies or wavelengths of characteristic xrays; a means for manually moving the position of the first cursor; and a means for automatically moving the second cursor in relation to the position indicated by the first cursor such that the energy indicated by one of the cursors corresponds to the wavelength indicated by the other.
Claim 3
Dependent Claim
78 words
The electron probe microanalyzer of claim 1, wherein said means for automatically moving the second cursor on the second spectrum in relation to the position indicated by the first cursor on the first spectrum comprises a conversion means that determines a position lying on the second spectrum corresponding to the position indicated by the first cursor on the first spectrum, and a means for bringing the second cursor into the position that is determined by the conversion means.
Claim 4
Dependent Claim
63 words
The electron probe microanalyzer of claim 1 or 2, further comprising a means for making an identification by reference to a stored table associating named elements and characteristic energies and wavelengths for emitted x-rays utilizing the wavelengths or energies corresponding to the positions indicated by the first and second cursors, and a means for displaying the result of the identification near the spectra.
Claim 5
Dependent Claim
159 words
An electron probe microanalyzer comprising: a means for irradiating the surface of a specimen with an electron beam; a wavelength-dispersive x-ray spectrometer and an energy-dispersive x-ray spectrometer which detect x-rays emanating from the specimen by the irradiation; display means on which spectra created from the xrays emitted from the same sample region under investigation and detected by the spectrometers are displayed; means for superimposing a first and a second cursor on the two kinds of spectra displayed on the display means to indicate the positions of energies or wavelengths of characteristic x-rays; a means for moving the first cursor; a means for moving the second cursor; a means which ascertains which of the cursors has been moved; and a means which automatically moves the cursor that has not been moved, in relation to the position indicated by the cursor already moved such that the energy indicated by one of the cursors corresponds to the wavelength indicated by the other.
Claim 6
Dependent Claim
159 words
An electron probe microanalyzer comprising: a means for irradiating the surface of a specimen with an electron beam; a wavelength-dispersive x-ray spectrometer and an energy-dispersive x-ray spectrometer which detect x-rays emanating from the specimen by the irradiation; display means on which spectra created from the xrays emitted from the same sample region under investigation and detected by the spectrometers are displayed; means for superimposing a first and a second cursor on the two kinds of spectra displayed on the display means to indicate the positions of energies or wavelengths of characteristic x-rays; a means for moving the first cursor; a means for moving the second cursor; a means which ascertains which of the cursors has been moved; and a means which automatically moves the cursor that has not been moved, in relation to the position indicated by the cursor already moved such that the energy indicated by one of the cursors corresponds to the wavelength indicated by the other.
Claim 7
Dependent Claim
89 words
The electron probe microanalyzer of claim 4, wherein said means for moving the cursor that has not been moved, in relation to the position indicated by the cursor already moved comprises a conversion means that determines a position lying on one spectrum and corresponding to the position indicated by the cursor already moved, the last-mentioned cursor lying on the other spectrum; and a means for bringing the cursor that has not been moved into the position which is determined by the conversion means and lies on the other spectrum.
Claim 8
Dependent Claim
47 words
The electron probe microanalyzer of claim 4 or 5, further comprising a means for making an identification utilizing the wavelengths or energies corresponding to the positions indicated by the first and second cursors, respectively; and a means for displaying the result of the identification near the spectra.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |