Time Domain and Fourier Domain
OCT• Quick Configurations
• Time Domain OCT• Time Domain Signal for δ-like Object
• Missing facts
• More realistic example
• Possible solution
• Fourier Domain OCT• Fourier Domain OCT• Fourier Domain Signal for δ-like Object
• Noise removal
• More realistic example
• Diffraction Effects in FD-OCT• Born Approximation
• Direct application to the OCT
• Rytov Approximation
• Direct application to the OCT
What is missing in conventional
TD-OCT
� Refractive index of the whole sample has been
considered constant.
� Reflectivity of each layer does not depend on
the refractive index. the refractive index.
Maximizing the first term yields:
Maximizing the second layer in two different angles yield:
Just functions of n1 constants
The left hand side is just the function of n1 and
may be solved for the refractive index.
Born Approximation
Using the angular spectrum representation yields
Born approximation works well
just for very small objects