90-degree deflecting beam-splitting polarizing prism provided with reference light window

The invention relates to the field of structural design and material selection of polarization optical elements, and particularly to a deflecting beam-splitting polarizing prism provided with a reference light window and combining iceland spar and glass. The present invention discloses a 90-degree deflecting beam-splitting polarizing prism provided with a reference light window and combining iceland spar and glass. The deflecting beam-splitting polarizing prism integrates a beam 90-degree deflecting and polarization beam-splitting functions, and has an output window for reference light. The reference light has no surface distortion with respect to the incident light. The incident light can be monitored or correspondingly modulated by analysis of a reference light signal. Finally, the polarizing prism can also save iceland spar crystal material and is reduced in production cost. 本发明属于偏振光学元件的结构设计和材料选用领域，特别涉及到种冰洲石与玻璃组合的带参考光窗口的转向分束偏光棱镜，本发明公开了种带参考光窗口的冰洲石与玻璃组合的90°转向分束偏光棱镜，该转向分束偏光棱镜集成了光束90°转向和偏振分束功能，同时棱镜还有个参考光的输出窗口，