Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1976-03-10
1977-07-26
Evans, F. L.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356 98, G01J 330
Patent
active
040379620
ABSTRACT:
An apparatus for spectroscopically analyzing the composition of a workpiece comprises a support on which is mounted a sleeve having an open end engageable with the surface of the workpiece and formed with a laterally open cutout. An electrode is mounted on the support and has an electrode tip limitedly displaceable in the sleeve adjacent the open end thereof. A laterally extending screw is engaged between an insulating tube constituting part of the support and the electrode and serves to fix the electrode in the sleeve with the electrode tip spaced inwardly of the open end of the sleeve. A power supply is connected to the electrode for sparking between the surface of the workpiece and the tip when the two are spaced apart and the open end of the sleeve abuts the surface. A lens on the support is directed through the cutout at the space between the electrode tip and the workpiece surface and cooperates with a primary slit to transmit into the support the light of a spark in the space between the electrode tip and the workpiece surface. A Rowland grating having a plurality of secondary slits is provided in the support for breaking the light received from the lens and primary slit down into an analyzable spectrum.
REFERENCES:
patent: 2723590 (1955-11-01), Berthold
patent: 2837959 (1958-06-01), Saunderson et al.
patent: 3645628 (1972-02-01), Bojic et al.
patent: 3909133 (1975-09-01), Hobson et al.
patent: 3942892 (1976-03-01), Ambrose et al.
Berstermann Wilhelm
Grisar Ulrich
Evans F. L.
Klockner-Werke AG
Striker Michael J.
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