| abstract |
The invention relates to a method for observing a biological sample, the sample (10) being arranged between a light source (11) and a pixelated image sensor (20), comprising the following steps: a) illumination of the sample by a light source, the light source emitting an incident light beam (12) propagating to the sample along a propagation axis, in an emission spectral band of 1 µm to 20 µm; b) acquisition of an image of the sample by the pixelated image sensor, no imaging optics being arranged between the sample and the image sensor; the method being characterised in that the sample is capable of absorbing part of the incident light beam, so that the acquired image is representative of the absorption of the incident beam by the sample. |