Author Affiliations
Abstract
Department of Optoelectronic Engineering, Ji'nan University, Guangzhou 510632
We present a simple but effective method for small-angle measurement based on optical feedback interferometry (or laser self-mixing interferometry). The absolute zero angle can be defined at the biggest fringe amplitude point, so this method can also achieve absolute angle measurement. In order to verify the method, we construct an angle measurement system. The Fourier-transform method is used to analysis the interference signal. Rotation angles are experimentally measured with a resolution of 10^{-6} rad and a measurement range of approximately from -0.0007 to +0.0007 rad.
角度测量 光回馈干涉 绝对测量 120.3180 Interferometry 120.1680 Collimation 120.3940 Metrology Chinese Optics Letters
2008, 6(11): 830