Wavelength – openfnirs

Definition: Wavelength is the distance between corresponding points of a wave separated by one period. It is commonly denoted $\lambdA$ , and given by: $\lambda = \frac{u}{v}$ where $u$ is the wave speed and $v$ is the frequency. In fNIRS, wavelength refers to the specific range of light wavelengths used to measure changes in chromophore concentration in the brain. Typically these are between 650-900 nm.

Category: Physics

Related terms: Peak Wavelength, Source, Emitter, Chromophore, Optical Window

Abbreviation or symbol: WL,

$lambda$

Synonym:

References:

https://doi.org/10.1073/pnas.2208729119

Alternative definition:

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