What is the wavelength used by spectral domain OCT?

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Study for the Optical Coherence Tomography C Fundamentals Test. Access multiple choice questions and flashcards with hints and explanations. Get exam-ready in no time!

Multiple Choice

What is the wavelength used by spectral domain OCT?

Explanation:
Near-infrared light around 840 nm is used in spectral-domain OCT. This wavelength region offers a good balance between tissue penetration and detector/optics efficiency, allowing clear imaging of retinal and deeper ocular structures while maintaining high resolution. Visible wavelengths (550–680 nm) scatter more in tissue and don’t penetrate as well, and while 780 nm is also near-IR, 840 nm is the standard choice because it provides deeper penetration with compatible optical components and detectors.

Near-infrared light around 840 nm is used in spectral-domain OCT. This wavelength region offers a good balance between tissue penetration and detector/optics efficiency, allowing clear imaging of retinal and deeper ocular structures while maintaining high resolution. Visible wavelengths (550–680 nm) scatter more in tissue and don’t penetrate as well, and while 780 nm is also near-IR, 840 nm is the standard choice because it provides deeper penetration with compatible optical components and detectors.

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