Open AccessLaser expander design of highly efficient Blu-ray disc pickup head
Author(s) -
Wen Shing Sun,
Kun Di Liu,
Jui Wen Pan,
ChuenLin Tien,
Min Sheng Hsieh
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.002235
Subject(s) - pickup , beam expander , optics , collimator , beam (structure) , head (geology) , materials science , laser , laser beams , diode , physics , optoelectronics , computer science , geomorphology , artificial intelligence , image (mathematics) , geology
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.