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This development represents a significant hardware advancement in photoacoustic microscopy by utilizing an electrically tunable metalens to achieve 1.2mm axial depth without mechanical components. The ability to dynamically switch focal modes enables high-resolution volumetric imaging of living tissue, which is critical for advancing non-invasive diagnostic tools in biomedical research.
Source coveringQuantum Zeitgeist
What this isA model's reading of the article and related coverage, written for aiqbench. Not the publisher's words.

Metalens scans entire eye in 3D with 1.2mm depth

Quantum Zeitgeist5 min read

A new electrically switched dual-focus metalens enables 3D photoacoustic imaging, achieving 1.2mm depth while maintaining 3.7μm resolution.

Researchers have developed a metalens-based photoacoustic microscopy system capable of 1.2 mm axial coverage, a substantial increase over the shallow depth of focus limiting current in-vivo tissue imaging. The new system uses a silicon nitride nanostructured metalens to switch between two focal modes at visible wavelengths, requiring only 0.87 V and 1.03 V and responding in 250 ms without mechanical parts. Demonstrated through high-resolution imaging of neovascularization in rat eyes with chemically induced corneal burns, the compact system provides "building blocks for future high-resolution volumetric imaging with an improved signal-to-noise ratio." Achieving 1.2 mm axial coverage represents an advance in vivo photoacoustic imaging, enhancing…

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