Laser expander design of highly efficient Blu-ray disc pickup head.
We present a collimator design with a horizontal beam expander for a Blu-ray Disc pickup head. The design transforms the shape of a laser diode beam from an elliptical into circular which achieves higher efficiency in the pickup head system. In this research, we suggest two ways to do the beam expander. One way is to use two cylindrical lenses, and the other is to use two prisms.
Sun
Wen-Shing
WS
Department of Optics and Photonics, National Central University, 32001 Chung-Li, Taiwan, R.O.C. wssun@dop.ncu.edu.tw
Liu
Kun-Di
KD
Pan
Jui-Wen
JW
Tien
Chuen-Lin
CL
Hsieh
Min-Sheng
MS
D016250:Compact Disks; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014159:Transducers