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US 2015/0029507 A1Published application
Alignment method for optical axes of composite waveplate
AssigneeHuazhong University of Science and Technology
InventorsShiyuan LIU, Honggang GU, Xiuguo CHEN, Chuanwei ZHANG, Weiqi LI, Weichao DU
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Abstract
An alignment method for optical axes of a composite waveplate includes rotating a rotatable waveplate, which rotates about a central axis with respect to a fixed waveplate, and adjusting the rotation angle thereof until the differences between the spectral parameters of the composite waveplate and ideal spectral parameters are smaller than preset values.
Claims8
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.
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