摘要
讨论了在光盘读写头设计中采用全息光学元件(HOE)及二极管激光器所涉及的技术问题及解决方法。双全息光学元件的应用可以校正二极管激光器输出的椭圆光束,可以补偿二极管激光输出波长变动对聚焦光斑的影响。采用光线追迹计算机模拟方法讨论了几种全息式光盘读写头结构。对双球面透镜双全息光学元件的读写头结构给出了实验结果。
This paper presents the techniques of the optical read/write head using holographic optical elements(HOEs). The multi-functional HOE having two HOEs, one element inclined relative to the other, changes the elliptical beam to a circular one and compensates the variation of the focus spot caused by wavelength shift. In addition, the aberration of the lens is designed to be eliminated by the HOEs. Two types of holographic optical read/write head with spherical or aspherical leneses are described. The computer simulation and experimental results of the two configurations are shown.
出处
《天津大学学报》
EI
CAS
CSCD
1990年第4期93-99,共7页
Journal of Tianjin University(Science and Technology)
基金
国家自然科学基金
关键词
光盘
读写头
全息光学元件
holographic optical element(HOE), optical read / write head, multi-functional HOE, wavelength compensation
