2016/3 Ke-Fang Hsu, Chih-Wei Lin, Mei-Wen Chen, Jung-Min Hwang, Li-Ling Lee
Abstract:
A high-quality museum
lighting system should demonstrate optimal color rendering and high light
source efficiency. In addition, an adequate lighting management system is
required for energy saving and visual comfort. However, symmetrical total
internal reflection (TIR) lenses typically applied in lighting fixtures are
inadequate for providing a comfortable lighting experience for museum visitors.
This paper presents a new optical lens that forms a novel asymmetrical
triangular light distribution for improving the vertical illuminance uniformity
of museum exhibits. Moreover, the proposed lens can reduce the reflective glare
caused by the glass covering exhibits. Monte Carlo ray tracing simulation
techniques were used to develop various lens structures and numerous
microstructures, which enabled changing the light distribution from a
traditional symmetrical to an asymmetrical triangle. Finally, an asymmetrical
TIR lens with a microstructure surface was constructed and applied to exhibit
lighting. According to the ray tracing results obtained using Tracepro
simulation software and DIALux lighting design software, the asymmetrical lens
formed an asymmetrical triangular light distribution with an LED light source
and enhanced the illuminance uniformity by 29 %, improving the light quality of
museum exhibits. The preliminary simulation results revealed that the proposed
lens structure effectively improved the LED lighting quality in the museum.
- Link:
- International Journals (國際期刊):
Ke-Fang Hsu, Chih-Wei Lin,
Mei-Wen Chen, Jung-Min Hwang, Li-Ling Lee,Design of asymmetrical total internal
reflection optics with microstructures for lighting museum exhibits, Opt Quant
Electron (2016) 48:236
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