METHOD FOR OPTIMISING THE DESIGN OF AN ACHROMATIC INFRARED LENS CORRECTED FROM THERMAL DRIFTS, AND ASSOCIATED IMAGE SENSOR

摘要

The invention relates to the general field of methods for optimising an optical lens architecture (O) intended to operate within a given wavelength range and within a given temperature range. The method of the invention comprises steps of optimising the optical combination according to a first plurality (N) of wavelengths and a second plurality (M) of temperatures based on the use of an optical combination in the Petzval-type paraxial domain comprising two converging lenses. Said method is well suited to lenses that operate in infrared, made completely or partially from germanium. The invention also relates to an image capture system comprising an optical lens calculated according to the aforementioned method, which also comprises a photosensitive sensor (C) and electronic means (TI) for processing images. The images processing consists in using a Wiener-type deconvolution filter in order to filter the digital image captured by the sensor.