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US 4,255,656 AGranted
Apparatus for charged particle spectroscopy
AssigneeKratos LLC
InventorsAndrew Barrie, Quentin C. Herd
Life of this patent
Estimating the term…
Abstract
Charged-particle spectroscopy apparatus for the chemical analysis of a sample in which an apertured plate receives charged particles emitted from the sample and transmits them to an analyzer for analyzing the energies of the particles, the aperture of the plate being such as to restrict the particles passing therethrough to a pencil beam of particles from a selected area of the sample.
Claims4
Apparatus for charged-particle spectroscopy for chemical analysis of a sample comprising
- a laser or light directing means for irradiating a selected restricted area of a sample so as to release charged particles from the selected area by photon excitation, and to visibly identify the irradiated area of the sample,
- an apertured plate mounted adjacent the sample to receive charged particles therefrom and to transmit a pencil beam of said particles received from the selected restricted area,
- charged particle focusing means for forming a charged particle image of said selected area in an image plane, and
- an energy analyser for analysing the energies of the particles passing through the apertured plate.
1 more element
Apparatus for charged-particle spectroscopy for chemical analysis of a sample comprising
- means for irradiating an extended area of a sample so as to release charged particles from the whole of that extended area,
- an apertured plate mounted adjacent the sample to receive charged particles therefrom and to transmit a pencil beam of said particles received from a selected restricted part of that extended area,
- charged particle focusing means for forming a charged particle image of said selected area in an image plane,
- an energy analyser for analysing the energies of the particles passing through the apertured plate, and a laser, or light-directing means, arranged to direct a beam of radiation through the apertured plate on the axis of said pencil beam to form an illuminated spot on said selected area of the sample thereby providing a visual identification of said selected area.
1 more element
Dependencies are inferred from the claim text.