Patent ID: 7253905

Claim:
A method for determination and correction of laser induced CCD lines degradation, comprising the steps of: employing a laser to emit radiation having a finely adjustable wavelength; employing a spectrometer to determine the wavelength of the emitted laser radiation; projecting interference fringes produced by said spectrometer onto a CCD line formed by a plurality of camera pixels: correcting a sensitivity of each camera pixel to compensate for damage to each camera pixel caused by said radiation by shifting the wavelength of said radiation by small, incremental steps; employing a CCD camera to record each interference pattern after each wavelength shift; summing all recorded interference patterns; calculating an average interference pattern R(i); evaluating the sensitivity of each individual pixel i of the CCD camera and; increasing the sensitivity of said CCD camera by an amount that compensates for the loss of sensitivity determined by said evaluation.