Multispectral reflection imaging system

A method for making an imaging device configured to image a sample, comprising at least:

• providing a first light source configured to emit a light;
• making a light deflection device configured to deflect the light intended to be emitted by the first light source towards the sample, comprising a material portion provided with a first main face intended to be arranged opposite the sample, a second main face opposite to the first main face, and a first lateral face towards which the light is intended to be emitted by the first light source;
• the making of the light deflection device including making, at one amongst the first and second main faces, oblique portions with respect to the other one amongst the first and second main faces and each configured to deflect a portion of the received light towards the sample, and planar portions parallel to the other one amongst the first and second main faces and configured to let the light backscattered by the sample pass;
• and
• providing an imager comprising a plurality of pixels and having a detection face arranged opposite the second main face and intended to receive the light backscattered by the sample,
• wherein each pixel of the imager is arranged opposite one of the planar portions of said one amongst the first and second main faces,
• wherein the oblique portions are arranged in a staggered manner and spaced apart from each other by the planar portions in a step-wise manner such that a distance between the first main face and the second main face changes along a length of the light deflection device, and
• wherein only the planar portions of said one amongst the first and second main faces and/or the other one amongst the first and second main faces are covered by an antireflective material.