Conference proceeding
Continuous variation in Fresnel lens focal length
Proceedings of LEOS'94, v 1, pp 136-137
1994
Abstract
An optical structure which combines a Fresnel zone plate with an induced convex lens on a PLZT substrate has been proposed to enable initial focusing under no applied potential, a continuous range of short focal distances, and the ability to switch the focal point to infinity. The transmitted optical field was analytically described and a simple formula was derived that demonstrated the dependence of the new focal length on each focusing mechanism. The numerical example provided showed a continuous change of focal length of about 16% while maintaining a good parabolic shape of the induced lens.
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Details
- Title
- Continuous variation in Fresnel lens focal length
- Creators
- F Castro - Drexel UniversityB Nabet
- Publication Details
- Proceedings of LEOS'94, v 1, pp 136-137
- Conference
- LEOS'94
- Publisher
- IEEE
- Number of pages
- 1
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Other Identifier
- 991019182778504721