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A microchip that maps the back of the eye

Researchers from Colombia University in the US have produced high contrast OCT images using an 8mm square microchip

22 Sep 2019 by Selina Powell

Scientists have described their efforts to capture optical coherence tomography (OCT) images using a microchip in APL photonics.

Researchers from Colombia University in the US produced high-contrast OCT images on an 8mm square microchip using a tunable delay line.

The authors hope that the technology will receive industry funding to develop a small fully integrated handheld OCT device for use outside of hospitals in low resource settings.

A 0.4m Si3N4 delay line was coiled on to the microchip with microheaters that act to tune the heat sensitive Si3N4.

Co-author, Aseema Mohanty, highlighted that the development extends the OCT imaging range by 0.6mm while maintaining a high signal to noise ratio.

“Previously, we’ve been limited, but using the technique we developed in this project, we’re able to say we can make any size system on a chip,” she said.

Image credit: Pixabay/Thomas1311

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