Related Experiment Video
Updated: Dec 22, 2025

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
Published on: August 4, 2018
Spectrally dependent roll-off in visible-light optical coherence tomography
Spectrally dependent roll-off (SDR) can alter visible-light optical coherence tomography (vis-OCT) spectroscopic imaging. This study models SDR, verifies its impact on blood oxygenation measurements, and provides a correction method for accurate vis-OCT data.
Area of Science:
- Optical Engineering
- Spectroscopy
- Biomedical Imaging
Background:
- Visible-light optical coherence tomography (vis-OCT) enables noninvasive spectroscopic imaging.
- Spectrally dependent roll-off (SDR) can distort spectral measurements in vis-OCT.
- Accurate spectroscopic data is crucial for advanced vis-OCT applications.
Purpose of the Study:
- To develop a mathematical model for spectrally dependent roll-off (SDR) in vis-OCT.
- To investigate the impact of SDR on spectroscopic measurements, specifically of oxygenated blood.
- To propose and validate a method for correcting SDR-induced alterations in vis-OCT data.
Main Methods:
- Formulated a mathematical model for SDR, incorporating spectrometer nonuniformities and optical aberrations.
- Simulated SDR using the developed model and compared simulation results with experimental vis-OCT measurements.
- Quantified the effect of SDR on spectroscopic measurements of fully oxygenated blood.
- Implemented a correction strategy by normalizing spectrally dependent A-lines with measured SDR.
Main Results:
- The mathematical model for SDR showed strong agreement with experimental vis-OCT measurements.
- SDR was confirmed to alter spectroscopic measurements of fully oxygenated blood.
- Normalization by the measured SDR effectively corrected SDR-induced alterations in spectroscopic data.
Conclusions:
- The developed SDR model accurately represents spectral distortions in vis-OCT systems.
- Correction of SDR is essential for reliable spectroscopic measurements using vis-OCT.
- These findings are critical for optimizing vis-OCT spectrometer design, alignment, and data analysis.
More Related Videos
Related Concept Videos
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
The ATR process begins by directing a beam...
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
According to Hooke's law, the vibrational frequency is directly proportional to...
UV–Vis Spectroscopy: Woodward–Fieser Rules
Imaging Biological Samples with Optical Microscopy
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Total Internal Reflection Fluorescence Microscopy

