Jonathan W Murray

Author:

Jonathan Murray

ISBN #:

0786717874

Author:

Jonathan Murray

ISBN #:

0786719265

Author:

Jonathan Murray

ISBN #:

0852618182

Author:

Jonathan Murray

ISBN #:

1905222181

Author:

Jonathan Murray

ISBN #:

1905222718

US Patent:

20220229307, Jul 21, 2022

Filed:

Jan 17, 2022

Appl. No.:

17/577168

Inventors:

- Shizuoka, JP
Kosuke Saito - Hamamatsu-shi, JP
Alexander Cutler - Hopkinton MA, US
Jonathan P. Murray - Chelmsford MA, US
Donald L. McDaniel - North Andover MA, US
Huiling Zhu - Lexington MA, US

Assignee:

Hamamatsu Photonics K.K. - Shizuoka

International Classification:

G02B 27/10
G02B 26/00

Abstract:

A spectrally-shaped source includes a source that generates a round beam. An optical element transforms the round beam to a rectangular beam. An image forming dispersive device angularly disperses wavelengths and images the rectangular beam at a modulation plane. A pixelated SLM is illuminated by the dispersed wavelengths of the rectangular beam such that each column of illuminated pixels is illuminated by a different wavelength. Toroidal optics projects light directed from the SLM to an output plane and focuses the angularly dispersed wavelengths of the beam so that a selected portion of the optical beam is reflected toward the toroidal optic by the SLM. A controller instructs the pixelated SLM to selectively reflect the portion of the optical beam toward the toroidal optic and to selectively reflect another portion of the beam away from the toroidal optic so as to provide a desired spectral shape.

US Patent:

20180252760, Sep 6, 2018

Filed:

Mar 2, 2018

Appl. No.:

15/910106

Inventors:

- Shakopee MN, US
Jonathan P. Murray - Chelmsford MA, US
David J. Lane - Beverly MA, US
Thomas M. Cunneen - Beverly MA, US

International Classification:

G01R 31/14
G01R 31/12

Abstract:

A method of detecting a partial discharge in an electrical asset includes sensing of a discharge current in the electrical asset using a transducer and responsively providing a transducer output; processing the transducer output by comparing the transducer output to a baseline; calculating an accumulated amount by which the transducer output exceeds the baseline; decreasing the accumulated amount with time; detecting partial discharge in the electrical asset based upon the accumulated amount; and providing an output related to detected partial discharge. A partial discharge detection system for detecting a partial discharge in an electrical asset includes a transducer configured to receive a signal from the electrical asset generated due to an occurrence of partial discharging in the electrical asset and responsively providing a transducer output. Processing circuitry compares the transducer output to a baseline, calculates an accumulated amount by which the transducer output exceeds the baseline, decreases the accumulated amount with time, and detects partial discharge in the electrical asset based upon the accumulated amount. Output circuitry provides an output related to detected partial discharge.