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Compact design for a unitary photo detector and single-path combo optical pickup head for Blu-ray disc, digital versatile disc and compact disc systems

机译:适用于蓝光光盘,数字多功能光盘和光盘系统的一体式光电探测器和单路径组合光学头的紧凑设计

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摘要

We present a compact design for a unitary photo detector and single-path combination optical pickup head (OPH) which can be used for Blu-ray Disc, digital versatile disc and compact disc systems. The number of components in the OPH design can be reduced by focusing three discrete wavelength laser beams on the photo detector. The three laser diode chips and a photo detector can be encapsulated within an integrated optical unit (IOU), which is then combined with a compensator and rhomboid beam-splitter prism. The blazed holographic optical elements (HOEs) are designed for concentrating the diffracted light power to the Oth-order and the lst-order to improve the round-trip efficiency. The simulation results, including the S-curve and optical efficiency, are compared for this combo-OPH with three IOUs. The optical efficiency of the proposed OPH for BD/DVD/CD systems as detected by the photo detector are 5.545%, 3.889%, and 3.517%, respectively. Our design results show that the combo-OPH with one IOU is better than the combo-OPH with three IOUs.
机译:我们为单一光电探测器和单路径组合光学拾取头(OPH)提供了一种紧凑型设计,可用于蓝光光盘,数字多功能光盘和光盘系统。通过将三个离散波长的激光束聚焦在光电检测器上,可以减少OPH设计中的组件数量。这三个激光二极管芯片和一个光电探测器可以封装在一个集成光学单元(IOU)中,然后与补偿器和菱形分束棱镜组合在一起。闪耀全息光学元件(HOE)用于将衍射光功率集中到Oth阶和lst阶,以提高往返效率。比较了具有三个IOU的该组合式OPH的仿真结果,包括S曲线和光学效率。由光电检测器检测到的用于BD / DVD / CD系统的OPH的光学效率分别为5.545%,3.889%和3.517%。我们的设计结果表明,具有一个IOU的组合式OPH优于具有三个IOU的组合式OPH。

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