中大機構典藏-NCU Institutional Repository-提供博碩士論文、考古題、期刊論文、研究計畫等下載:Item 987654321/51047
English  |  正體中文  |  简体中文  |  Items with full text/Total items : 67783/67783 (100%)
Visitors : 23086818      Online Users : 206
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/51047


    Title: Optical Design and Analysis of a Laser Expander for a Blu-ray Pickup Head for Synchronous Detection of the Tilt Angle and Displacement on the Test Plane
    Authors: Sun,WS;Lin,YN;Chang,JY
    Contributors: 光電科學與工程學系
    Keywords: DISK PICKUP;OBJECTIVE LENS;COMPACT;PROFILOMETER;CANTILEVER
    Date: 2011
    Issue Date: 2012-03-27 18:16:40 (UTC+8)
    Publisher: 國立中央大學
    Abstract: An optical design is developed for a Blu-ray pickup head with a laser expander that can synchronously detect the linear displacement and two-dimensional angular tilts at the test plane. To improve the signal accuracy of the photo detector, a laser expander is used to transform the shape of the laser beam from elliptical to circular. A quadrant detector as used to detect the relative relationship between the V(A), V(B), V(C), V(D) signals, can be used to measure the tilt angle and displacement at the test plane. Measurement detection and analysis is based on one normalized focus error signal (NFES) and two angular signals. The optical efficiency of the Blu-ray pickup head with laser expander is 59.29%. The optical efficiency of the currently used commercial pickup head is only 8.08%. Tolerance analysis is also considered in the performance requirements. (C) 2011 The Japan Society of Applied Physics
    Relation: JAPANESE JOURNAL OF APPLIED PHYSICS
    Appears in Collections:[Department of Optics and Photonics] journal & Dissertation

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML324View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明