In the paper a new method to obtain the phase shift by adding adjustable polarize and 1/4 wave length plate is presented, which is simple and no influence with different phase value.

• 文中提出了一种在散光激光入射光路中用加入一可调偏振片和一可调1/4波片实现散光图象双折射相移的方法,该方法设备简单,能保证总体光强的一致性。