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Tolerance allocation and auto alignment algorithm of focusing unit for near field recording system

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Abstract

A tolerance allocation and auto alignment algorithm for the optical head of the near-field recoding (NFR) system are presented. The optical head of the NFR system consists of a solid immersion lens (SIL) and an objective lens (OL). The effects of assembling and manufacturing tolerances of SIL and OL are simulated using CODE V. These analyses show that the tolerances are very tight. So we proposed to move the collimate lens (CL) back and forth to compensate and control these tolerances, especially in the optical axis direction. Also, we allocate the compound tolerance of decenter and tilt motions of the SIL and OL using the worst On worst analysis (WOW) model. In addition, to align SIL and OL under these tolerances, we propose an auto alignment algorithm between SIL and OL. The simulation results of the alignment algorithm are compared with the experimental results.

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Authors and Affiliations

  1. Department of Future Technology, Korea Institute of Machinery & Materials, 171 Jang-Dong, Yuseong-Gu, Daejon, 305-701, Korea

    Jun-Hee Lee

  2. Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusung-Dong, Yuseong-Gu, ME3265, Daejon, 305-701, Korea

    Dae-Gab Gweon, Hyun-Kil Youn & Jaehwa Jeong

  3. Digital Media Research Laboratory, LG Electronics, Seoul, 137-724, Korea

    Dae-Keun Jin

Authors
  1. Jun-Hee Lee
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  2. Dae-Gab Gweon
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  3. Dae-Keun Jin
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  4. Hyun-Kil Youn
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  5. Jaehwa Jeong
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Lee, JH., Gweon, DG., Jin, DK. et al. Tolerance allocation and auto alignment algorithm of focusing unit for near field recording system. Int J Adv Manuf Technol 29, 1041–1049 (2006). https://doi.org/10.1007/s00170-004-2141-4

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  • DOI: https://doi.org/10.1007/s00170-004-2141-4

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