Patent ID: 9103667
Filing Date: 2015-08-11
Classification: G01B,G02B

Abstract:
1. A method for aligning optical axes of a composite waveplate, for any two adjacent waveplates of the composite waveplate, the method comprising: a) fixing a first one of the two adjacent waveplates to be a fixed waveplate and arranging the second one of the two adjacent waveplates to be a rotatable waveplate in parallel to the fixed waveplate and capable of rotating about a central axis with respect to the fixed waveplate; b) vertically irradiating polarized light on the fixed waveplate, and allowing the light to sequentially pass through the fixed waveplate and the rotatable waveplate; c) detecting and analyzing a light intensity signal of the emitted light to obtain spectral parameters of a composite waveplate containing the fixed waveplate and the rotatable waveplate; d) comparing the spectral parameters of the composite waveplate with ideal spectral parameters to obtaining differences between the spectral parameters of the composite waveplate and the ideal spectral parameters; and e) rotating the rotatable waveplate rotating about a central axis with respect to the fixed waveplate and adjusting a rotation angle of the rotatable waveplate until the differences between the spectral parameters of the composite waveplate and the ideal spectral parameters are smaller than preset values.