Acta Optica Sinica, Volume. 33, Issue 4, 423001(2013)
Depolarization Performance for Monochromatic Light of an Improved Lyot Depolarizer
In order to study the depolarization performance for monochromatic light of improved Lyot depolarizer, the method of superposition of multiple beam is proposed. The formula for depolarization degree D that is the function of vibration azimuth angle (VAA) and total retardation is deduced. It is shown by theoretical analysis that D is ideal for any VAA when retardation δ=(N+ 1/2)π (N is integer) on the basis of large enough wedge angle. And when δ=Nπ, VAA makes greatest impact on D. When δ is assigned to the other values, the impact on D made by VAA is between the former two. Using 405 nm diode laser whose beam is expanded and collimated, experiments to measure D of sample whose wedge angle is 6° are conducted. The theoretical results are well verified by experiments. D is over 98.8% when total retardation δ is nearly (N+ 1/2)π by changing incident angle.
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Ren Shufeng, Wu Fuquan, Wu Wendi. Depolarization Performance for Monochromatic Light of an Improved Lyot Depolarizer[J]. Acta Optica Sinica, 2013, 33(4): 423001
Category: Optical Devices
Received: Oct. 29, 2012
Accepted: --
Published Online: Mar. 22, 2013
The Author Email: Shufeng Ren (renshufeng7909@163.com)