Laser scanners have emerged as a powerful instrument for high-precision 3-D geometry measurement. However, such attractive laser scanners have failed to address to drop of receiving power due to laser's interaction with the surface of the object under measurement. This is a serious weakness of laser scanning systems since it can result in data deterioration and data loss in the acquired 3-D point clouds. Numerous studies have been carried out on laser illumination on rough surfaces and have shown that interference between backscattered lights within the laser beam spot forms speckles that affect the level of the receiving power. In this article, we propose a laser scanner having a rapid and continuous polarization scrambling function and cope with the drop in the receiving power. This is the first report of speckle reduction with the depolarization approach in laser scanning used for industrial measurement.