Optimising efficiency in diamond turned Fresnel mould masters

John L. Allsop; Arjen Mateboer; Paul Shore

doi:10.1117/12.882925

19 April 2011 Optimising efficiency in diamond turned Fresnel mould masters

John L. Allsop, Arjen Mateboer, Paul Shore

Proceedings Volume 8065, SPIE Eco-Photonics 2011: Sustainable Design, Manufacturing, and Engineering Workforce Education for a Green Future; 806509 (2011) https://doi.org/10.1117/12.882925
Event: SPIE Eco-Photonics, 2011, Strasbourg, France

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.

Citation Download Citation

John L. Allsop, Arjen Mateboer, and Paul Shore "Optimising efficiency in diamond turned Fresnel mould masters", Proc. SPIE 8065, SPIE Eco-Photonics 2011: Sustainable Design, Manufacturing, and Engineering Workforce Education for a Green Future, 806509 (19 April 2011); https://doi.org/10.1117/12.882925

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