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Metalens-based imaging spectrometer for confocal endoscopy imaging
Applied Optics
|August 13, 2026
Summary
A new metalens-based imaging spectrometer (MLIS) offers high-resolution, in vivo imaging for early lesion diagnosis. This compact device achieves high spectral resolution, improving accuracy in detecting cellular abnormalities.
Area of Science:
- Optics
- Biomedical Engineering
- Spectroscopy
Background:
- Confocal endoscopy requires high spectral resolution for accurate in vivo lesion cell diagnosis.
- Current techniques face limitations in achieving both high spectral resolution and compact design.
Purpose of the Study:
- To propose a novel metalens-based imaging spectrometer (MLIS) for high-resolution confocal endoscopy.
- To enhance early and accurate diagnosis of lesion cells in vivo.
Main Methods:
- Investigated the ratio of focal length to dispersion width for optimal dispersion linearity and spatial resolution.
- Analytically studied the effect of metalens phase distribution on dispersion width for high spectral resolution.
- Optimized polynomial phase terms to balance astigmatism and coma aberrations.
Main Results:
- Developed a compact MLIS (6mm×2.4mm) operating in the 780-860 nm wavelength band.
- Achieved high dispersion linearity and a spectral resolution of 0.4 nm.
- Demonstrated the potential for high-resolution, in vivo imaging.
Conclusions:
- The proposed MLIS provides a significant advancement for in vivo cellular imaging.
- This technology paves the way for improved diagnostic capabilities in endoscopy.
- The compact and high-performance design addresses limitations of current imaging techniques.
