Patent ID: 9464882
Filing Date: 2016-10-11
CPC Classification: G01B

Claim Text:
1. An interferometer, comprising: a beam splitter operative to split a source light beam into a reference beam and a measurement beam, the reference beam for striking a reference surface, and the measurement beam for striking a measurement sample; one-dimensional array of optical detector elements operative to receive a combination of light beams reflected from the reference surface and the measurement sample, respectively, and to detect interference fringes resulting from the combination of light beams, the one-dimensional array of optical detector elements being operative to detect an intensity signal, l(x,y,t), corresponding to an intensity of at least a portion of the combination of light beams at a pixel position, x,y, and at a time, t; a modulator operative to modulate a wavelength of the source light beam at a predetermined sinusoidal frequency, ω signal processing means including at least arctangent logic means and phase unwrapping logic means, the signal processing means being operative: