Based on the scanned and processed yarn images, the fabric that uses real effect yarns is simulated through superposing the yarn axis with the position calculated by the fabric density.

This paper analyzes the fabric feature of optic axis of the sandstone in coalbearing series of Tonger well field in Fengfeng mining area by using of microscope.

The advantage is that simple device, easy adjustment and only revolving the column lens that can fabric various linear-defect in photonic lattices, they have different orientation relative toc-axis.