Design of Astigmatic Lens with Compensating Optical Aberra tion
WANG Yu-xing, GONG Ma-li,YAN Ping, CUI Rui-zhen, JIA Wei-pu, ZHANG Hai-tao (Digital Photonics Lab. Department of Precision Instruments, Tsin ghua University, Beijing 100084, China)
We analyzed coma and astigmatism aberration cause d by optical flat plate which is common used in optical pickup systems. According the result we got, we designed an cylindrical lens which can not only help to ge nerate focusing error signal but also compensate the optical aberration mentione d above. Tested and verified in practical optical pickup head, this lens can ful fill the requirement of digital versatile disk pickup systems.
【CateGory Index】： TQ591