Method for measuring three-dimension shape

Abstract

A method of measuring a 3D shape, which can measure a 3D shape of target objects on a board by searching a database for bare board information when a measuring object is not set to a normal inspection mode or by performing bare board teaching when the board is supplied from a supplier having not the bare board information is provided. The method of measuring a 3D shape includes operation S 100 of measuring a brightness of a first illumination source 41 a, operation S 200 of measuring a phase-to-height conversion factor, operation S 300 of determining whether the measurement is performed in a normal inspection mode, operation S 400 of measuring a 3D shape of a board 62 according to the normal inspection mode, operation S 500 of determining whether bare board information about the board 62 is included, operation S 600 of performing bare board teaching when the bare board information is excluded, operation S 700 of measuring the 3D shape of target objects on the board 62 when the bare board information is included or bare board teaching information is generated, and operation S 800 of analyzing whether the board 62 is normal or abnormal by using 3D shape information. Therefore, the 3D shape of target objects on the board may be more readily measured.

1 . A method of measuring a 3 dimensional (3D) image, the method comprising:
 measuring a brightness of a first illumination source by controlling, by a central control unit, a module control unit and an image acquisition unit;   measuring a phase-to-height conversion factor by controlling, by the central control unit, the module control unit and the image acquisition unit when the brightness of the first illumination source is measured;   determining by the central control unit whether the measurement is performed in a normal inspection mode when the brightness of the first illumination source and the phase-to-height conversion factor are measured;   measuring a 3D shape of target objects on a board according to the normal inspection mode by controlling, by the central control unit, the module control unit and the image acquisition unit when it is the normal inspection mode as a result of the determination;   searching a database and determining, by the central control unit, whether bare board information about the board is included in the database when it is not the normal inspection mode but teaching-based inspection mode as a result of the determination;   performing bare board teaching by controlling, by the central control unit, the module control unit and the image acquisition unit when the bare board information is excluded in the database;   measuring the 3D shape of target objects on the board according to a teaching-based inspection mode by controlling, by the central control unit, the module control unit and the image acquisition unit when the bare board information is included in the database or when bare board teaching information is generated in the performing of the bare board teaching; and   analyzing by the central control unit whether the board is normal or abnormal by using information about the measured 3D shape of target objects on the board when the 3D shape of target objects is measured according to the normal inspection mode and the teaching-based inspection mode.