Analyses Of Optical Anisotropy Of Pc Substrate For M-0 Disc And Its Effect On Cnr.

Akihiko Yoshizawa; Nobuhide Matsubayashi

doi:10.1117/12.936822

14 January 1987 Analyses Of Optical Anisotropy Of Pc Substrate For M-0 Disc And Its Effect On Cnr.

Akihiko Yoshizawa, Nobuhide Matsubayashi

Proceedings Volume 0695, Optical Mass Data Storage II; (1987) https://doi.org/10.1117/12.936822
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

Abstract

One of the problems to be solved for the development of magneto-optical disc drivers is how to detect signals with a good carrier to noise ratio. The birefringence observed in the disc substrate is one of the factors which give serious effect on the ratio.1 We have studied the optical anisotropy of injection molded polycarbonate substrate and found that the optic axis representing the birefringence is almost perpendicular to the disc surface though it has been widely believed that the axis is parallel to the surface. Based upon the newly found fact, we have calculated the effect of the birefringence upon the carrier to noise ratio.

Citation Download Citation

Akihiko Yoshizawa and Nobuhide Matsubayashi "Analyses Of Optical Anisotropy Of Pc Substrate For M-0 Disc And Its Effect On Cnr.", Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); https://doi.org/10.1117/12.936822

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