Patent ID: 7788067

Claim:
A method for validating signals to determine sizes and velocities of spherical objects, comprising: receiving a light scattered from a spherical object that forms an interference fringe pattern; generating a time varying electrical signal associated with the spherical object in response to the receiving; partitioning the time varying electrical signal associated with the spherical object into at least a first timing segment associated with the spherical object and a second timing segment associated with the spherical object; processing the first timing segment to determine a first timing parameter of the time varying electrical signal associated with the spherical object; processing the second timing segment to determine a second timing parameter of the time varying electrical signal associated with the spherical object; verifying a consistency between the first timing parameter of the time varying electrical signal and the second timing parameter of the time varying electrical signal; and validating a periodicity of the time varying electrical signal associated with the spherical object based on the consistency.