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Optical Engineering

Design and indoor testing of a compact optical concentrator
Author(s): Cheng Zheng; Qiyuan Li; Gary Rosengarten; Evatt Hawkes; Robert A. Taylor
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Paper Abstract

We propose and analyze designs for stationary and compact optical concentrators. The designs are based on a catadioptric assembly with a linear focus line. They have a focal distance of around 10 to 15 cm with a concentration ratio (4.5 to 5.9 times). The concentrator employs an internal linear-tracking mechanism, making it suitable for rooftop solar applications. The optical performance of the collector has been simulated with ray tracing software (Zemax), and laser-based indoor experiments were carried out to validate this model. The results show that the system is capable of achieving an average optical efficiency of around 66% to 69% during the middle 6 (sunniest) h of the day. The design process and principles described in this work will help enable a new class of rooftop solar thermal concentrators.

Paper Details

Date Published: 10 January 2017
PDF: 10 pages
Opt. Eng. 56(1) 015102 doi: 10.1117/1.OE.56.1.015102
Published in: Optical Engineering Volume 56, Issue 1
Show Author Affiliations
Cheng Zheng, The Univ. of New South Wales (Australia)
Qiyuan Li, The Univ. of New South Wales (Australia)
Gary Rosengarten, RMIT Univ. (Australia)
Evatt Hawkes, The Univ. of New South Wales (Australia)
Robert A. Taylor, The Univ. of New South Wales (Australia)


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