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

Area of Science:

• Optics and Photonics
• Sustainable Building Design

Background:

• Effective indoor illumination relies on high rendering index and uniformity.
• Natural Light Illumination Systems (NLIS) harness sunlight but require efficient light emitters.
• Current emitters have limitations in optimizing light distribution for diverse environments.

Purpose of the Study:

• To propose a novel linear microstructure light emitter for NLIS.
• To enhance indoor illuminance uniformity and efficiency.
• To improve the light distribution capabilities of NLIS.

Main Methods:

• Design and fabrication of a linear microstructure light emitter.
• Incorporation of two microstructures for optimized light distribution.
• Experimental evaluation of illuminance uniformity and efficiency.

Main Results:

• The proposed light emitter achieved an illuminance uniformity of 0.55%.
• The system demonstrated a high efficiency of 74.18%.
• The microstructures effectively diffused parallel light, promoting a wider illuminative area.

Conclusions:

• The developed linear microstructure light emitter significantly improves NLIS performance.
• This technology offers a promising solution for efficient and uniform indoor natural lighting.
• The findings contribute to advancements in sustainable lighting solutions for buildings.