Inventors:
Matthew T. O'Grady - Phoenixville PA, US
Assignee:
Sensors Unlimited, Inc. - Princeton NJ
International Classification:
G01J 1/44
H03F 3/08
H01J 40/14
Abstract:
A method and apparatus for providing enhanced resolution in photodetector arrays is provided. In a first pass, pixels of a photodetector array are set to low input impedance values, and measurements of each pixel value are taken. In a second pass, selected pixels are set to high input impedance levels and remaining pixels set to low input impedance level, and measurements are taken at The low input impedance pixels. In a third pass, input impedance levels are reversed, and measurements are taken at the low input impedance pixels. A sequence of mathematical calculations are then performed on the measurements taken in the first, second, and third passes to produce half-pixel values for each of the pixels of the array, thereby doubling the resolution of the array without requiring additional circuitry or modification thereto.
