Patent ID: 9127931
Filing Date: 2015-09-08
Classification: G01B,G02B

Abstract:
1. A thickness-information acquisition apparatus comprising: an image acquisition section configured to acquire a phase-difference image of a sample; a correlation-distribution computation section configured to compute a correlation distribution of an image in said phase-difference image with respect to pixels of another image in said phase-difference image; a thickness-information acquisition section configured to acquire information on a thickness of said sample in accordance with said correlation distribution; and a control section configured to determine a number of image taking layers to image the sample based on the determined thickness of the sample, the number of image taking layers being proportional to the determined thickness of the sample, wherein said thickness-information acquisition section is at least further configured to: wherein the correlation distribution is a quadratic distribution and the information regarding the thickness of the sample is based on a peak of the quadratic distribution.