A handheld laser scanning confocal reflectance imaging-confocal Raman microspectroscopy system

Area of Science:

• Optics and Photonics
• Biomedical Engineering
• Spectroscopy

Background:

• Confocal microscopy and Raman spectroscopy offer non-destructive, micron-scale analysis.
• Existing systems are typically large, bench-top instruments, limiting field applications.
• There is a need for portable, high-resolution imaging and spectroscopy devices.

Purpose of the Study:

• To develop a compact, handheld probe integrating laser scanning confocal reflectance imaging and confocal Raman spectroscopy.
• To achieve high-resolution imaging and spectroscopy in a portable format.
• To demonstrate the instrument's utility for clinical diagnostics.

Main Methods:

• Development of a handheld probe utilizing a MEMS mirror for beam scanning.
• Integration of confocal reflectance imaging and confocal Raman spectroscopy channels.
• Characterization of optical performance, including axial resolution.

Main Results:

• The probe achieves axial resolutions of up to 4 μm for imaging and 10 μm for spectroscopy.
• Demonstrated high-resolution imaging and spectral acquisition from normal skin.
• Successful integration of laser scanning confocal reflectance imaging and Raman spectroscopy in a compact device.

Conclusions:

• The developed handheld probe offers a portable solution for high-resolution, non-destructive analysis.
• The instrument shows significant potential for in-situ clinical diagnostics.
• This technology advances the application of advanced optical techniques outside traditional laboratory settings.