Patent ID: 8539814

Claim:
A material measure for use in evaluating performance of a measuring instrument for measuring surface texture, comprising a measurement area having a plurality of grooves in a predetermined direction, wherein: each of the grooves has a simple cross-sectional shape at a cross-section along the predetermined direction; a length of the cross-sectional shape in the predetermined direction is different for a predetermined number of adjacent grooves in the predetermined direction, the plurality of grooves are linear grooves formed in parallel with a direction orthogonal to the cross-section, in the cross-section, a maximum inclination angle of a profile of the cross-sectional shape to the predetermined direction is constant between the plurality of grooves arranged in the predetermined direction, and, when a direction orthogonal to the predetermined direction in the cross-section is a depth direction and the direction orthogonal to the cross-section is a linear direction, in each of the grooves, a depth of the groove and the maximum inclination angle are different in the linear direction.