Narrow-band radiation wavelength measurement by processing digital photographs in RAW format

The technique of measuring the mean wavelength of narrow-band radiation in the 455 – 625-nm range using the image of the emitting surface is presented. The data from the camera array unprocessed by the built-in processor (RAW format) are used. The method is applied for determining the parameters of response of holographic sensors. Depending on the wavelength and brightness of the image fragment, the mean square deviation of the wavelength amounts to 0.3 – 3 nm.