Patent ID: 8244023

Claim:
A shape measuring device, comprising: a projection unit that projects a slit projection pattern formed of one slit light onto a test object; a slit image formation unit that forms a plurality of slit images, which is generated by the slit projection pattern projected from the projection unit is reflected by the test object, separated in a direction perpendicular to a slit base line direction; an imaging unit that picks up the plurality of slit images separately formed by the slit image formation unit to generate a plurality of slit picture images; a position adjustment unit that relatively moves the slit projection pattern and the test object in a direction different from the slit base direction of the slit projection pattern; a slit picture image selection unit that compares brightness of each pixel of slit picture image on the slit base line direction and selects, from the plurality of slit picture images acquired by the imaging unit, a slit picture image having an optimum brightness to determine the shape of the test object on the slit base line direction, and acquires slit image data for determining the shape of the test object; and a shape computing unit that computes a shape of the test object using a relative position of the slit projection pattern with respect to the test object, which has been relatively moved by the position adjustment unit, and the slit picture image data acquired by the slit picture image selection unit.