Patent ID: 6271924
Filing Date: 2001-08-07
Classification: G01B,G01H,G11B

Abstract:
A method for measuring the dynamic parameters of micro and macro objects, which comprises the steps of:illuminating the object with a beam from a coherent source of light having at least a single wavelength and stabilized frequency, said beam being split into two orthogonal polarized beams, the first polarized beams striking a surface of the object of investigation and being reflected, the second polarized beam impinging on a reference surface and being reflected, wherein at least one acousto optic deflector is used for scanning the first polarized beam along a measuring path and for scanning the second polarized beam along a reference path;combining the beam reflected from the surface of the object of investigation and the beam from the reference surface and causing them to interfere with each other;determining the phase or frequency shift between the beam striking the object of investigation and the beam striking the reference surface, as a result of the difference in the reference and measuring paths; anddetermining from the phase or frequency shift the dynamic parameters of the object under investigation.