Since off-axis wander results in images which have astigmatism when the prism is placed in a convergingbeam, Glan types have slightly better imaging qualities than Nicla types.
因为当棱镜置于会聚光束中时,离轴漂移造成有像散的像,格兰型棱镜的成像质量比尼·科尔型略好。
2
This paper presents the features of a lens designed for converging the laser beam onto the target and the solution of the aspherical lenses using equal optical path principle.