US Patent 7355701 Spectroscopy analysis apparatus

A spectroscopy analysis apparatus contains a focusing unit which focuses light from a light source on a sample, an optical scanner which scans the light on the sample, an optical detector which detects light intensity of the light emitted from the sample, and a cross-correlation calculating unit which calculates cross-correlation between the measurement points by associating light intensity with scanning position of the optical scanner, light intensity, which is detected with the optical detector, from plural measurement points on the sample, whose position is controlled with the optical scanner.