High Performance Versatile Semiconductor Laser Diode Doppler Velocimeter

Abstract

Described is a new, compact vector-velocimeter setup using a self-mixing type laser diode, which without utilizing frequency-offset devices discriminates direction of target motion with velocity range of 23 mm/s to 3.2 m/s. The range of absolute value velocity measured is 0.2 mm/s to 34 m/s .