The Composite Polarizing Beam Splitter Design And Performance Testing

The polarizer is the key component in the treating of polarized information and the application of polarized technique. Polarizing prism talent showing itself for its high extinction ratio, good transmittance and powerful optical damage threshold, and it is unsubstituted as an important polarizer in laser polarization technology. At the psesent time, most of polarizing prism is made of Iceland spar which is a rare nature crystal. So the excellent polarizer isn't fit for application widely for its high price. Making polarizing prism by the means of combination of optical glass and Iceland spar can reduce the price apparently for the price of optical glass is cheap. Some similar ideas had been put forward previously, but only two type of them are worthy of reference, which are Feussner prism and Ammann-Massey prism. But only a few people pay attention to them for the lack of optical glass and glue and some inherent flaw, such as beam deflection angle,low extinction ratio,temperature scope of application etc.Our research work of combination of Iceland spar and glass polarizing prism is based on four points: select suitable material,calculation,machining and testing. Select suitable material means that select the optical glass and glue that can match with Iceland spar suitably; The optimal design scheme of prism is determined by calculation and analysis; The samples are machined, solving the technical problems, such as the matching of material and increasing transmittance; We pay attention to the transmittance and extinction ratio of prism which based on the good beam splitting in experimental test. Our thesis mostly includes thereinafter aspect:The first chapter is the introduction, which telling of the writing background and the writing purpose. And in this part, I narrate the innovation and mostly work i did in the studying.The second chapter is mainly telling of the traditional prism, including the studying history,the basis theory and some sutra designs of the traditional Iceland spar prism, especially describing and studying the mostly object of this textual—the beam splitting prism.The third chapter is started on the research of the optics glass, narrate the correlation theory and development history of the combination of Iceland spar and glass beam splitting polarizing prism, and include some sutra design of recent several years. According to the contrasting and research, advance several new practical redesigns.The fourth chapter mainly tell of the design theory of the combination of Iceland spar and glass beam splitting polarizing prism, the testing course of the sample,the testing result and the regard proceeding. And analyze the testing error.At last, contrasting of mainly optics parameters with traditional prism, indicate that: the design theory of the combination of Iceland spar and glass beam splitting polarizing prism is feasible, it saves the costly Iceland spar material and possesses the same optics capability. Also, it realizes the beam modulate and splitting which smart conveniences the optical building and assorting with else apparatus. This design will have the wide using foreground in the future.The main innovations of this article are the summing-up of the design theory and the new design of the combination of Iceland spar and glass beam splitting polarizing prism, which include parallel beam splitting prism and 90°beam splitting polarized prism. Detailed analysis are given about the mainly optics parameters of the new design, and the new designs are made into samples whose performance are tested by experiment. According to the contrasting and research, sum up the relation of every parameter and validate the practicability of the new design.