Zeeman laser-scanning confocal microscopy in turbid media

Area of Science:

• Optics and Photonics
• Biomedical Imaging
• Microscopy

Background:

• Conventional laser-scanning confocal microscopy (LSCM) faces challenges with scattering media.
• Image quality and depth resolution degrade due to scattering.
• Weak-scattering photons are often lost, and multiple scattering obscures details.

Purpose of the Study:

• To propose and evaluate a novel Zeeman laser-scanning confocal microscope (ZLSCM).
• To enhance the collection efficiency of weak-scattering photons.
• To suppress multiple-scattering photons for improved depth resolution in scattering media.

Main Methods:

• Utilized a Zeeman laser in conjunction with a Glan-Thompson analyzer, similar to conventional LSCM.
• Integrated a bandpass filter with the analyzer to act as a polarization and coherence gate.
• Experimentally demonstrated the performance of the ZLSCM in scattering media.

Main Results:

• The ZLSCM demonstrated enhanced collection of weak-scattering photons.
• Multiple-scattering photons were effectively suppressed by the polarization and coherence gate.
• Significant improvement in depth resolution was observed compared to conventional LSCM.

Conclusions:

• The proposed ZLSCM offers superior performance in scattering media.
• The integrated polarization and coherence gating effectively improves imaging.
• ZLSCM is a promising technique for deep-tissue or scattering environment imaging.