Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1984-05-29
1987-12-08
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158R, 250341, 250234, G01R 3126, H01J 314
Patent
active
047120630
ABSTRACT:
A laser scanning system for scanning the surface of a photovoltaic cell in a precise, stepped raster pattern includes electric current detecting and measuring equipment for sensing the current response of the scanned cell to the laser beam at each stepped irradiated spot or pixel on the cell surface. A computer is used to control and monitor the raster position of the laser scan as well as monitoring the corresponding current responses, storing this data, operating on it, and for feeding the data to a graphic plotter for producing a visual, color-coded image of the current response of the cell to the laser scan. A translation platform driven by stepper motors in precise X and Y distances holds and rasters the cell being scanned under a stationary spot-focused laser beam.
REFERENCES:
patent: 3437929 (1969-04-01), Glenn
patent: 4051437 (1977-09-01), Lile et al.
patent: 4254552 (1981-03-01), Samis
patent: 4455485 (1984-06-01), Hosaka et al.
Gauthier et al; "Solar Cell Defect Analyzer"; NASA Tech. Briefs; Fall 1979; pp. 398-399.
Emery Keith A.
Osterwald Carl R.
Albrecht John M.
Eisenzopf Reinhard J.
Hightower Judson R.
Nguyen Vinh P.
Richardson Kenneth L.
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