Method and apparatus for producing calibrated spectral imaging devices

A method for calibrating a spectral imaging device, the method comprising:

• obtaining first spectral data, which specifies spectral quantum efficiency of detector pixels for an image sensor,
• obtaining second spectral data, which specifies a spectral transmittance function for a Fabry-Perot interferometer,
• providing the spectral imaging device, which comprises the Fabry-Perot interferometer and the image sensor, the image sensor comprising first detector pixels and second detector pixels, a spectral quantum efficiency of the first detector pixels being different from a spectral quantum efficiency of the second detector pixels,
• providing first calibration light, wherein the first calibration light has a first calibration spectrum which comprises a plurality of spectral peaks,
• coupling the first calibration light to the spectral imaging device,
• obtaining a first measured profile of the first calibration light by recording first detector pixel signals during scanning a control parameter of the Fabry-Perot interferometer,
• obtaining a second measured profile of the first calibration light by recording second detector pixel signals during scanning the control parameter,
• determining a first simulated profile from the first calibration spectrum by using the spectral quantum efficiency of the first detector pixels, by using the spectral transmittance function, and by using first calibration data,
• determining a second simulated profile from the first calibration spectrum by using the spectral quantum efficiency of the second detector pixels, by using the spectral transmittance function, and by using the first calibration data,
• modifying the first calibration data until the simulated profiles match with the corresponding measured profiles, according to one or more matching criteria, and
• storing the modified first calibration data in a memory.