Write noise from optical heads with nonachromatic beam expansion prisms

David B. Kay; Scott B. Chase; Edward C. Gage; Barry D. Silverstein

doi:10.1117/12.45941

1 July 1991 Write noise from optical heads with nonachromatic beam expansion prisms

David B. Kay, Scott B. Chase, Edward C. Gage, Barry D. Silverstein

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45941
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

Abstract

The purposes for achromatizing the optics in an optical recording head are: (a) to reduce focal shifts of the spot at the disk and in the focus sensing system, and (b) to eliminate lateral shifts of the spot at the disk when the laser wavelength shifts. Reference 1 discusses the use of a very low dispersion glass in the fabrication of molded singlet lenses for use in optical data storage. This paper discusses an effect of a lateral shift of the focal spot that occurs, due to the dispersion in the beam expansion prism, when the laser mode hops.

Citation Download Citation

David B. Kay, Scott B. Chase, Edward C. Gage, and Barry D. Silverstein "Write noise from optical heads with nonachromatic beam expansion prisms", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45941

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