Share Email Print
cover

Proceedings Paper

Optimising efficiency in diamond turned Fresnel mould masters
Author(s): John L. Allsop; Arjen Mateboer; Paul Shore
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Radial and Linear Fresnel Lenses are finding application as light concentrators for Concentrated Photovoltaic and Concentrated Solar Thermal power applications. The efficiency of these diffractive lenses directly affects the yield of such systems. Peaks and valleys of the optical facets of the Fresnel lens must be sharp in order to prevent diffusion and transmission loss due to rounding. For diamond turned mould masters, optical facet tip sharpness is affected by machining accuracy, tool-path and tool wear/mileage. Strategies to optimise optical facet tip sharpness are presented which enable production of large lenses with minimal degradation of optical quality. Radial Fresnel produced with diameters over 500mm and Linear Fresnel over 1m long are discussed with data on structure fidelity and tool wear.

Paper Details

Date Published: 20 April 2011
PDF: 11 pages
Proc. SPIE 8065, SPIE Eco-Photonics 2011: Sustainable Design, Manufacturing, and Engineering Workforce Education for a Green Future, 806509 (20 April 2011); doi: 10.1117/12.882925
Show Author Affiliations
John L. Allsop, Cranfield Univ. (United Kingdom)
Arjen Mateboer, Cranfield Univ. (United Kingdom)
Paul Shore, Cranfield Univ. (United Kingdom)


Published in SPIE Proceedings Vol. 8065:
SPIE Eco-Photonics 2011: Sustainable Design, Manufacturing, and Engineering Workforce Education for a Green Future
Pierre Ambs; Dan Curticapean; Claus Emmelmann; Wolfgang Knapp; Zbigniew T. Kuznicki; Patrick P. Meyrueis, Editor(s)

© SPIE. Terms of Use
Back to Top