讨论了液晶相位可变延迟器(liquidcrystalvariableretarder,LCVR)在自旋极化电子产生方面的应用.LCVR控制入射光子的偏振度,从而实现对自旋极化电子束极化方向的调制.采用LCVR代替14波片和Pockels盒的优点在于其对入射光方向不敏感,传输直径大,不需要机械转动即可大波长范围的延迟,且易于校准.另外,还研制了旋转检偏器,通过示波器读出,对光子偏振性进行检测并对LCVR进行校准. The application of LCVR in the generation of spin-polarized electrons is discussed. The LCVR controls the polarization degree of the incident photons so as to modulate the polarization direction of spin-polarized electron beams. LCVR is used instead of LCVR The advantage of the 14-wave plate and Pockels box is that it is insensitive to the direction of the incident light, has a large transmission diameter, does not require mechanical rotation, and has a large wavelength range of retardation and is easy to calibrate. In addition, a rotary analyzer is also developed, Out, detect the photon polarization and calibrate the LCVR.