An innovative design of light collimator based on freeform microlens array

Whang, Allen Jong-Woei; Chou, Cheng-Fu; Wu, Xiaorong; Lin, Hui-Chun

doi:10.1109/aris.2014.6871505

Cited by 1 publication

(6 citation statements)

References 13 publications

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“…As presented in [9], all light rays were not parallel through the collimator. However, most of the rays were directed to the target surface for achieving high efficiency in terms of uniform illumination [9].…”

Section: Simulation Results In Dialuxmentioning

confidence: 96%

“…However, most of the rays were directed to the target surface for achieving high efficiency in terms of uniform illumination [9]. In this paper, we performed simulation using parallel light.…”

Section: Simulation Results In Dialuxmentioning

confidence: 99%

“…In this paper, we performed simulation using parallel light. If the incident light was not parallel [9], the efficiency, which was estimated based on the average illuminance on the analysis surface, of the linear microstructure was reduced. …”

Section: Simulation Results In Dialuxmentioning

confidence: 99%

“…To solve this problem, we have proposed a freeform collimator to achieve collimated light for getting high efficiency and inserting maximum light into the optical fiber, as shown in Fig. 2 [9]. Finally, the emitting subsystem is used to illuminate the interior space.…”

Section: Structure Of the Nlis Systemmentioning

confidence: 99%

“…1 [6][7][8][9]. The inputs of the system are sunlight and electricity for the light collector and light emitting diode (LED), respectively, to provide illumination when sunlight is not available.…”

Section: Structure Of the Nlis Systemmentioning

confidence: 99%

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Freeform microstructure linear light emitter design for a natural light illumination system

et al. 2015

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The major factors of an illuminative environment are a high rendering index and uniformity. The natural light illumination system (NLIS) is used to guide sunlight for indoor illumination. The NLIS consists of three subsystems: collecting, transmitting, and emitting. Nowadays, a variety of light emitters are available for different illuminative environments. This paper proposes a linear microstructure to diffuse parallel light for indoor illumination. To increase uniformity and promote the illuminative area, the light emitter includes two microstructures for the distribution of light. Finally, the proposed light emitter gives illuminance uniformity and efficiency of 0.55% and 74.18%, respectively.

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Section: Simulation Results In Dialuxmentioning

confidence: 96%

Section: Simulation Results In Dialuxmentioning

confidence: 99%

Section: Simulation Results In Dialuxmentioning

confidence: 99%

Section: Structure Of the Nlis Systemmentioning

confidence: 99%