Patent ID: 7046373
Filing Date: 2006-05-16
Classification: G01B,G01N

Abstract:
1. A system for measuring an index of refraction and a thickness of a transparent material, the system comprising: a laser source suitable for producing an emission; a power supply connected to said laser source; a collimator cooperative with said laser source so as to collimate the emission of said laser source; a sample of the transparent material; a rotating stage supporting said sample thereon at a select angle with respect to the collimated emission of said laser source; a photodiode means positioned on an opposite side of said rotating stage from said laser source, said photodiode means for receiving the collimated emission as passed through said sample; a oscilloscope means connected to said photodiode means, said oscilloscope means for producing an interferometric signal from the collimated emission received by said photodetector means; a control bus electrically connecting said oscilloscope means to said power supply; and a computing means connected to said control bus, said computing means for varying a wavelength of the emission of said laser source through said power supply, said computing means for determining a measurement of an optical path of the collimated emission of said sample so as to determine a thickness of said sample, said computing means being a personal computer.