Patent ID: 6075605
Filing Date: 2000-06-13
Classification: G01B

Abstract:
A shape measuring device comprising:light beam illuminating means for illuminating an object to be measured with a first set of light beams each having distribution of integrated illumination intensity of a stripe pattern in accordance with a predetermined code and with a second set of light beams having distribution of integrated illumination intensity of sine-wave like patterns in random order, said distributions of integrated illumination intensity being possessed, respectively, by the first and second sets of light beams illuminating within a time period for picking up one field or one frame;pickup means for picking up, by an integrating pickup member, an optical image formed on a surface of said object to be measured by said light beams; andimage information operating means for calculating a shape of said object to be measured by operating image information of a plurality of fields or a plurality of frames outputted from said pickup means,wherein said image information operating means calculates the shape of said object to be measured from space-coded image information and phase-shifted image information, said space-coded image information is obtained by illuminating said object to be measured with said first set of light beams in accordance with said predetermined codes thereof, and said phase-shifted image information is obtained by illuminating said object to be measured with the sine-wave like pattern of said second set of light beams.