1 July 1991 Write noise from optical heads with nonachromatic beam expansion prisms
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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
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.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David B. Kay, David B. Kay, Scott B. Chase, Scott B. Chase, Edward C. Gage, Edward C. Gage, Barry D. Silverstein, Barry D. Silverstein, "Write noise from optical heads with nonachromatic beam expansion prisms", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); doi: 10.1117/12.45941; https://doi.org/10.1117/12.45941


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