To establish a precise surface shape measurement technique, we improve our three dimensional measurement system using grating projection method. Improved points are 1) using a higher resolution camera, 2) setting supporting jigs with higher stiffness and higher accuracy, and 3) adjusting measurement parameters. Results of measurement experiments confirm effectiveness of our improvements. On the other hand, measurement results using optical method, such as grating projection method, are affected by optical characteristics of measured objects in general. Then, we apply the method to a surface shape measurement of a honeycomb sandwich panel which is widely used in space engineering. In this paper, to verify our measurement method we compare the measurement result with that using laser measurement equipment, and a good agreement is confirmed.
