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Related Experiment Video

Updated: Jun 21, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy (oSLO) and Optical Coherence Tomography (OCT)

Published on: August 4, 2018

Ultracompact backlight-reversed concentration optics.

Ming-Chin Chien¹, Yu Lung Tung, Chung-Hao Tien

¹Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan.

|July 23, 2009

Summary

This summary is machine-generated.

This study presents a novel solar concentrator using a groove sheet and wedge plate. The simple, versatile design achieves 52% optical efficiency for direct daylight applications.

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Published on: October 27, 2017

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Published on: October 27, 2017

Area of Science:

Optics and Photonics
Renewable Energy Technologies

Background:

Conventional solar concentrators often require complex designs and surface treatments.
Efficiently coupling and guiding solar radiance remains a key challenge in solar energy harvesting.

Purpose of the Study:

To demonstrate a simple and versatile solar concentration scheme.
To achieve high optical efficiency for direct daylight applications using readily available optical components.

Main Methods:

Utilized a reversed tracing concept with a conventional sidelit backlighting configuration.
Employed a groove sheet and a wedge plate without any coating or surface treatment.
Designed an optical arrangement to couple collimated solar radiance into a wedge plate and guide flux to the exit plane.

Main Results:

Achieved an optical efficiency of 52%.
Obtained an inverse aspect ratio of 9.51.
Demonstrated the potential for extending the 2D scheme to a 3D solar concentrator with a high concentration ratio.

Conclusions:

The proposed solar concentration scheme is simple, versatile, and effective for direct daylight use.
The design's potential for 3D extension offers significant impact for solar energy and other optical functions.
The use of uncoated, untreated optical components reduces manufacturing complexity and cost.