Apparatus for detecting surface potential distribution

Details Apparatus for detecting surface potential distribution Apparatus for detecting surface potential distribution

1989-06-28

1991-06-18

Boudreau, Leo H.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

350356, 350384, G01R 3100, G02F 103

Patent

active

050252097

ABSTRACT:
An apparatus for detecting a distribution of a surface potential on a measured object comprises a reading head opposing the measured object. The reading head includes an optical modulator subjected to an electric field representative of the surface potential distribution. The electric field applied to the optical modulator is varied in an alternating manner.

REFERENCES:
patent: 3691484 (1972-09-01), Dore
patent: 4761607 (1988-08-01), Shiragasawa et al.
patent: 4855591 (1989-08-01), Nakamura et al.
patent: 4891579 (1990-01-01), Aoshima et al.
patent: 4894607 (1990-01-01), Kumada
patent: 4906922 (1990-03-01), Takahashi et al.
Applied Optics, vol. 18, No. 12, Jun. 1979, New York, pp. 1895-1899, S. Jost and B. J. Pernick: "Temporal Measurements in the Spatial Frequency Spectrum of Liquid Crystal Image Transducers".

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