US4209697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing selected mass spectra
Assignee: Helmholtz Zentrum München
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Filing: 1978-01-26
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Granted: 1980-06-24
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Expires: 1998-01-26
Abstract
Abstract In a method for producing selected mass spectra by directing electromagnetic radiation through an optical system onto sample material for vaporization, destruction, excitation and/ or ionization in the microrange, setting the expanse of the irradiation region of the sample by selection of the energy density of the radiation, and detecting the released particles, the radiation power density is varied for producing mass spectra having respectively different proportions of atom and molecule spectra.
Inventors
- 👤 Gerhard Renner
- 👤 Eberhard Unsold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:26
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/16; H01J49/161
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
In a method for producing selected mass spectra by directing electromagnetic radiation through an optical system onto sample material for vaporization, destruction, excitation and/or ionization in the microrange, setting the expanse of the irradiated region of the sample by selection of the energy density of the radiation, and detecting the released particles, the improvement comprising varying the radiation power density for producing mass spectra having respectively different proportions of atom and molecule spectra.
Claim 2
Dependent Claim
73 words
In a method for producing selected mass spectra by directing electromagnetic radiation through an optical system onto sample material for vaporization, destruction, excitation and/or ionization in the microrange, setting the expanse of the irradiated region of the sample by selection of the energy density of the radiation, and detecting the released particles, the improvement comprising varying the radiation power density for producing mass spectra having respectively different proportions of atom and molecule spectra.
Claim 3
Dependent Claim
33 words
Method according to claim 1 further comprising, for purposes of indicating the total ion number forming the mass spectra, directly measuring the released particles or measuring the electrical current generated by the particles.
Claim 4
Dependent Claim
33 words
Method according to claim 2 wherein said step of varying the power density of the electromagnetic radiation is carried out by supplying radiation from various selected ones of a plurality of radiation sources.
Claim 5
Dependent Claim
33 words
Method according to claim 2 wherein said step of varying the power density of the electromagnetic radiation is carried out by subjecting the radiation to control by an electrooptical and/or optical pulse generator.
Claim 6
Dependent Claim
34 words
Method according to claim 2 wherein the radiation is supplied by a radiation source and said step of varying the power density of the electromagnetic radiation is carried out by adjusting the radiation source.
References Cited (Backward Citations)
US3813544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |