Optics: measuring and testing – With plural diverse test or art
Patent
1998-01-29
2000-08-22
Font, Frank G.
Optics: measuring and testing
With plural diverse test or art
324 731, G01N 2100
Patent
active
06108073&
ABSTRACT:
An electromagnetic wave detecting system free from restriction of shutter speed has a detector for detecting an electromagnetic wave having a specified wavelength generated from a device under test, a controller for outputting a drive signal for driving the device under test, for effecting the detector to detect an electromagnetic wave from the device under test for a first time interval from a predetermined time point to a detection start point during a first period to obtain a first detected value, and for effecting said detector to detect an electromagnetic wave from the device under test for a second time interval from the predetermined time point to a detection end point during a second period to obtain a second detected value, a first memory device for storing the first detected value, a second memory device for storing the second detected value, and a subtracter device for obtaining a third detected value which corresponds to a period from the detection start point to the detection end point by performing subtraction of the first detected value and the second detected value.
REFERENCES:
patent: 5196786 (1993-03-01), Usami et al.
patent: 5463226 (1995-10-01), Matsuzaki et al.
patent: 5682038 (1997-10-01), Hoffman
Font Frank G.
Kabushiki Kaisha Toshiba
Nguyen Tu T.
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