Patent ID: 7519502
Filing Date: 2009-04-14
Classification: G01B,G01C,G01S,Y02A

Abstract:
1. A method for obtaining liquid surface profile information, the method comprising: recording plural calibration images of a liquid surface, said recording of calibration images including recording at least two said calibration images at different elevations relative to said liquid surface, each said calibration image including plural calibration laser spots projected onto said liquid surface by a stationary device for recording said calibration images; performing calibration with respect to said calibration images, each said calibration laser spot being characterized by two apparent coordinates (x recording plural measurement images of said liquid surface, said recording of measurement images being performed in a time-resolved manner whereby said measurement images are time-sequentially recorded of said liquid surface in a dynamically changing condition, each said measurement image including plural measurement laser spots projected onto said liquid surface by a stationary device for recording said measurement images; performing data processing with respect to said measurement images, each said measurement laser spot being characterized by said two apparent coordinates (x