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US4467199A Expired / Lapsed US ⏱️ 0.0 years remaining

Macroanalyzer system

Assignee: Seiko Instruments Inc
•
Filing: 1981-06-03
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Granted: 1984-08-21
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Expires: 2001-06-03
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Abstract

Abstract Macroanalyzer system comprising in combination: a crystal for separating X-ray emitted from a sample, an X-ray detector for detecting X-ray which are separated by the crystal, and a solar slit member located between the crystal, sample and X-ray detector. An operation circuit receives the output of said X-ray detector to eliminate the effect of the X-ray passing through the solar slit.

Inventors

  • 👤 Mitsuyoshi Sato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 00:55
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/20; G01N23/207; G01N23/2076

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 219 words
A macroanalyzer comprising: an electron gun for emitting an electron beam; an electron lens positionsed for collimating the electron beam to a very small diameter which is small relative to the size of a target object to be analyzed and for scanning the collimated electron beam across a target object while maintaining the very small diameter of the beam; a flat diffraction crystal for diffracting secondary X-rays emitted from the target object as the electron beam is scanned thereacross; a first solar slit member positioned to collimate the secondary X-rays emitted from the target object before the secondary X-rays reach said diffraction crystal; a second solar slit member positioned to collimate X-rays diffracted from the diffraction crystal; the first and second solar slit members each comprising a plurality of stacked parallel plates with a slit formed between each two adjoining plates; an X-ray detector positioned to detect X-rays passed through said second solar slit member and to generate an output signal representative of the detected X-rays; and circuit means receptive of the X-ray detector output signal for discriminating between detected characteristic X-rays and a detected continuous X-ray spectrum and for dividing the respective discrimination X-ray values to eliminate X-ray intensity irregularities in the detected values of the characteristic X-rays caused by the X-rays passing through said solar slit members.
Claim 2
Dependent Claim 219 words
A macroanalyzer comprising: an electron gun for emitting an electron beam; an electron lens positionsed for collimating the electron beam to a very small diameter which is small relative to the size of a target object to be analyzed and for scanning the collimated electron beam across a target object while maintaining the very small diameter of the beam; a flat diffraction crystal for diffracting secondary X-rays emitted from the target object as the electron beam is scanned thereacross; a first solar slit member positioned to collimate the secondary X-rays emitted from the target object before the secondary X-rays reach said diffraction crystal; a second solar slit member positioned to collimate X-rays diffracted from the diffraction crystal; the first and second solar slit members each comprising a plurality of stacked parallel plates with a slit formed between each two adjoining plates; an X-ray detector positioned to detect X-rays passed through said second solar slit member and to generate an output signal representative of the detected X-rays; and circuit means receptive of the X-ray detector output signal for discriminating between detected characteristic X-rays and a detected continuous X-ray spectrum and for dividing the respective discrimination X-ray values to eliminate X-ray intensity irregularities in the detected values of the characteristic X-rays caused by the X-rays passing through said solar slit members.
Claim 3
Dependent Claim 69 words
A macroanalyzer according to claim 1, wherein said circuit means is comprised of: a pair of wave height discriminators each receptive of the X-ray detector output signal, and each set to discriminate a different wave height; a pair of counters each connected for counting the output of a respective one of said wave height discriminators; and dividing means for dividing the respective counts developed by said pair of counters.
Claim 4
Dependent Claim 73 words
A macroanalyzer according to claim 1, wherein said circuit means is comprised of: a pair of wave height discriminators each receptive of the X-ray detector output signal, and each set to discriminate a different wave height; a pair of rate meters each connected for counting the output of a respective one of said wave height discriminators; and an analog divider circuit for dividing the respective outputs developed by said pair of rate meters.

References Cited (Backward Citations)

US3160747A Cited
US3204095A Cited
US4037099A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-08-21 1988-02-20 1988-08-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-08-21 1992-02-20 1992-08-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-08-21 1996-02-20 1996-08-21 $7700.00 Window Closed / Lapsed

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