Apparatus for detecting distribution of electric surface potenti

Details Apparatus for detecting distribution of electric surface potenti Apparatus for detecting distribution of electric surface potenti

1989-05-05

1991-11-12

Wieder, Kenneth A.

Electricity: measuring and testing

A material property using electrostatic phenomenon

324 725, G01N 2760

Patent

active

050651021

ABSTRACT:
A voltage is electrostatically induced at a sensing device in correspondence with a surface potential of a measured object. In the case where the sensing device uses a field effect transistor in transferring detected information, there are some factors decreasing the accuracy of detection. Various new arrangements prevent such decreases in the accuracy of detection. In the case of the surface potential of the measured object corresponds to an optical image, new arrangements ensure accurate detection of the optical image. In some cases, color component signals are obtained on the basis of a detection signal.

REFERENCES:
patent: 3590343 (1971-06-01), Nathanson
patent: 3828256 (1974-08-01), Liu
patent: 4084134 (1978-04-01), Nagano
patent: 4150389 (1989-04-01), Roessler
patent: 4330749 (1982-05-01), Eda et al.
patent: 4423371 (1983-12-01), Senturia et al.
patent: 4646002 (1987-02-01), Tuszyski
Western Electric Technical Digest No. 45, Jan. 1977, pp. 27-29, Maddox.

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