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Updated: Feb 13, 2026
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Fabrication of Flexible Image Sensor Based on Lateral NIPIN Phototransistors
Published on: June 23, 2018
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Computational imaging, relighting and depth sensing using flexible thin-film sensors
Optics Express
|March 10, 2018
Summary
Flexible luminescent concentrators (LCs) capture images without lenses, enabling computational relighting and depth sensing. This lens-less imaging approach enhances signal-to-noise ratios for novel optical sensors.
Area of Science:
- Optics
- Computational Imaging
- Materials Science
Background:
- Traditional imaging systems rely on lenses and narrow apertures.
- Luminescent concentrators (LCs) are known for their light-guiding properties.
Purpose of the Study:
- To demonstrate a lens-less imaging system using thin-film luminescent concentrators.
- To explore the application of LCs for computational relighting and depth reconstruction.
- To evaluate the performance improvement of photodetectors with LCs.
Main Methods:
- Wrapping a thin-film luminescent concentrator (flexible plastic foil with fluorescent dye) around an object.
- Capturing images under varying synthetic lighting conditions.
- Utilizing computational imaging techniques for image analysis.
Main Results:
- Achieved lens-less imaging and depth reconstruction capabilities.
- Demonstrated higher signal-to-noise ratios for photodetectors equipped with LCs compared to direct measurements.
- Showcased the potential for flexible, scalable, and transparent optical sensors.
Conclusions:
- Thin-film luminescent concentrators offer a novel approach to optical sensing.
- LCs enable structured light collection over a wide solid angle.
- This technology facilitates the development of advanced, lens-less image and depth sensors.
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