Investigation of certain diffraction effects in a double-layer optical disk

Jang-hoon Yoo; Chul Woo Lee; Dong-Ho Shin; Chanda L. Bartlett; Kit-Iu Cheong; James Kevin Erwin; Masud Mansuripur

doi:10.1117/12.280687

30 July 1997 Investigation of certain diffraction effects in a double-layer optical disk

Jang-hoon Yoo, Chul Woo Lee, Dong-Ho Shin, Chanda L. Bartlett, Kit-Iu Cheong, James Kevin Erwin, Masud Mansuripur

Proceedings Volume 3109, Optical Data Storage 1997 Topical Meeting; (1997) https://doi.org/10.1117/12.280687
Event: Optical Data Storage Topical Meeting '97, 1997, Tucson, AZ, United States

Abstract

We report certain diffraction effects that are pertinent to the operation of double-layer optical recording media. The diffraction of light from the out-of-focus layer and the resulting distribution on the in-focus layer are studied using computer simulations. The findings are then verified by direct measurements. We also describe a technique for analyzing (by computer simulation) the focus-error signa, FES, in systems that use the astigmatic method in conjunction with the double-layer disk. The results of our computer simulations of the FES are compared with those measured in an actual disk drive; good agreement between computation and measurement is obtained.

Citation Download Citation

Jang-hoon Yoo, Chul Woo Lee, Dong-Ho Shin, Chanda L. Bartlett, Kit-Iu Cheong, James Kevin Erwin, and Masud Mansuripur "Investigation of certain diffraction effects in a double-layer optical disk", Proc. SPIE 3109, Optical Data Storage 1997 Topical Meeting, (30 July 1997); https://doi.org/10.1117/12.280687

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