Single camera based spectral domain polarization sensitive optical coherence tomography.

Area of Science:

• Biomedical Optics
• Medical Imaging Technology
• Ophthalmology Instrumentation

Background:

• Polarization-sensitive optical coherence tomography (PS-OCT) provides microstructural and birefringence information.
• Traditional PS-OCT systems often require multiple cameras or complex setups, increasing cost and limiting practical application.
• Developing cost-effective and robust PS-OCT systems is crucial for widespread clinical adoption.

Purpose of the Study:

• To develop a simplified and cost-effective spectral domain polarization sensitive optical coherence tomography (SD PS-OCT) system.
• To demonstrate the feasibility of using a single spectrometer CCD camera for SD PS-OCT.
• To validate the performance of the new system for in vivo imaging of human ocular tissues.

Main Methods:

• A novel SD PS-OCT system was designed utilizing a single spectrometer CCD camera.
• Horizontal and vertical polarization channel spectra were imaged adjacently onto a 2048-pixel line scan camera (1024 pixels per channel).
• Post-processing algorithms were developed to correct for spectral distortions; calibration and in vivo measurements were performed.

Main Results:

• The developed SD PS-OCT system successfully imaged adjacent polarization channels using a single camera.
• The system demonstrated reduced cost, complexity, and improved robustness against camera misalignments.
• Calibration measurements in a test sample were successful, and in vivo imaging of human ocular tissue was achieved.

Conclusions:

• A cost-effective and simplified SD PS-OCT system has been successfully developed using a single spectrometer CCD camera.
• The system offers practical advantages in terms of cost, complexity, and robustness for OCT imaging.
• The validated performance of this novel system shows promise for routine in vivo analysis of ocular tissues.