Browse > Article
http://dx.doi.org/10.5228/KSPP.2003.12.8.730

A Study on the Rotation-Induced Birefringence in Plastic Disk Substrate  

김종선 (단국대학교 대학원 기계공학과)
윤경환 (단국대학교 기계공학과)
Publication Information
Transactions of Materials Processing / v.12, no.8, 2003 , pp. 730-737 More about this Journal
Abstract
Extensive studies have been conducted for reducing the residual stresses and birefringence in injection-molded optical disk substrate Flow-induced and thermally-induced stresses and birefringence have been found as two main sources during injection molding process. However, high speed rotation also induces extra stresses and birefringence in real operation of disk drives. In the present paper rotation-induced in-plane birefringence has been measured and presented for CD and DVD substrates at different radial position. About 10 - 15 nm of extra retardation in one pass has been measured up to 4,800 rpm. The distribution of extra rotation-induced birefringence will be valuable data for designing an optimal optical disk substrate. Finally, experimental results were compared with the extra stresses calculated from simple formulation.
Keywords
Birefringence; Residual Stresses; Rotation-Induced Birefringence; CD; DVD;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Philips Technical Review, 1985, "A review of technology for the Laser-Vision videodiscs and the Compacy Disc", Royal Philips Electronics.
2 Ugural, A. C. and Fenster, S. K., 1995, Advanced Strength and Applied Elasticity, Prentice Hall PTR, New Jersey, pp. 327-350.
3 윤경환, 1996, "광디스크 기판의 성형에 관하여", 고분자 과학과 기술, Vol. 7, No. 3, pp. 284-290.
4 Janeschitz-Kriegl, 1983, Polymer Melt Rheology and Flow Birefringence., Springer-Verlag, Berlin.
5 Otani H., 1998, "2-D Birefringence measurement using Phase Shift", J. J. of Optics., Vol. 27, No. 12, pp. 698-703.
6 Baddour, N. and Zu, Z. W., 2001, "A revisit of spinning disk models. Part I: derivation of equations of motion", Appl. Mathematical Modelling, Vol 25, pp. 541-559.   DOI   ScienceOn
7 Kim, J. S. and Yoon, K. H., 2003, "A Study on the Prediction of Thermally-Induced Residual Stress and Birefringence in Quenched Polystyrene Plate Including Free Volume Theory", KSME (A), Vol. 27, No. 1, pp.77-87.   과학기술학회마을   DOI   ScienceOn
8 Mansuripur, M., "The Physical Principles of Magneto-optical Recording", Cambridge, Cambridge University Press, 1995.
9 DeGroot. P. J., Dergevorkian A and Erickson T., 1998, "Interferomatic analysis of stress induced birefringence in a rotating disk", Proc. SPIE, pp. 227-233.
10 Lee, Y. B., Kwon, T. H. and Yoon, K. H., 2002, "Numerical Prediction of Residual Stresses and Birefringence in Injection/ Compression molded Center-Gated Disk. Part I and Part II", Polym. Eng. Sci., Vol. 42, No. 11, pp. 2246-2272 & 2273-2292.   DOI   ScienceOn