Patent ID: 6271513
Filing Date: 2001-08-07
Classification: B82Y,G01Q

Abstract:
A shear force feedback system capable of scanning a large area of a sample comprising:a first laser for providing a laser beam;a cylinder lens for converting the laser beam from the first laser into a uniformly distributed beam in a large area along a plane parallel to the sample;a probe, disposed on a vibration apparatus and able to vibrate on the plane parallel to the sample, wherein the probe has a tip and the tip of the probe is placed in the uniformly distributed beam;a moving apparatus for moving the probe along the plane parallel to the sample so as to scan the sample;a detecting apparatus for detecting a variation of light intensity distribution due to a variation of the vibration angle around the probe, so as to use feedback to control the distance between the probe and the surface of the sample according to the variation of the light intensity.