Back to Search
Start Over
Micro-optic lens for data storage
- Source :
- Research Studies on Advanced Optical Module(Head Designs for Optical Devices.
- Publication Year :
- 1991
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1991.
-
Abstract
- A new type of microlens for data storage applications that has improved off-axis performance is described. 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.
- Subjects :
- Documentation And Information Science
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Journal :
- Research Studies on Advanced Optical Module(Head Designs for Optical Devices
- Publication Type :
- Report
- Accession number :
- edsnas.19920005694
- Document Type :
- Report