Patent ID: 7667857
Filing Date: 2010-02-23
Classification: G01B

Abstract:
1. An optical displacement meter for measuring a displacement of an object to be measured, comprising: a projector for irradiating an object to be measured with spot-shaped light and scanning in a first direction, a one-dimensional light receiving device having a plurality of pixel construction parts extending a second direction perpendicular to the first direction for receiving reflection light image of the spot-shaped light line by line and for outputting a reception light signal corresponding to amount of the reflection light image of the spot-shaped light at each line; amplifier for amplifying the reception light signal from the one-dimensional light receiving device; a profile computing means for calculating a position of the reflection light image in the second direction at each line on the one-dimensional light receiving device based on the amplified reception light signal, and for computing displacement of the object at a position in the second direction at each line as the profile shape of the object to be measured on the basis of the position of the reflection light image along the second direction on the one-dimensional light receiving device; a display unit capable of displaying the profile shape of the object to be measured computed by the profile computing means; registered-profile designating means for designating at least part of the profile shape displayed on the display unit as a registered profile; a profile matching means for computing matching amount between the profile shape of the object to be measured computed by the profile computing means and the registered profile designated by the registered-profile designating means under a plurality of inspection conditions, and for computing an inspection condition where the matching amount is high; and an outputting means for rotating or shifting the inspected profile shape based on the inspection condition where the matching amount is high computed by the profile matching means and for outputting the rotated or shifted inspected profile shape.