Micro-optic lens for data storage

Tomas D. Milster; Robert M. Trusty; Mark Shi Wang; Fred Franklin Froehlich; James Kevin Erwin

doi:10.1117/12.45900

1 July 1991 Micro-optic lens for data storage

Tomas D. Milster, Robert M. Trusty, Mark Shi Wang, Fred Franklin Froehlich, James Kevin Erwin

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45900
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

Abstract

We describe a new type of microlens for data storage applications that has improved off-axis performance. The lens consists of a micro-Fresnel pattern on a curved substrate. The radius of the substrate is equal to the focal length of the lens. If the pattern and substrate are thin, the combination satisfies the Abbe sine condition. Therefore, the lens is free of coma. We analyze a 0.5 numerical aperture, 0.50 mm focal length lens in detail. A 0.16 numerical aperture lens was fabricated holographically, and results are presented.

Citation Download Citation

Tomas D. Milster, Robert M. Trusty, Mark Shi Wang, Fred Franklin Froehlich, and James Kevin Erwin "Micro-optic lens for data storage", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45900

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