Method for producing a digital image, associated computer program product and optical system

Optical system comprising:

• a processing unit for producing a digital image;
• a hollow body comprising:
• an objective lens to collect a set of incoming light beams from a study scene;
• an eyepiece to restore all or some of the incoming light beams;
• capture means having an active face, to capture all or some of said incoming light beams;
• restoration means comprising an active face to project, into the hollow body, the digital image in the form of a set of projected light beams;
• the processing unit being arranged to produce the digital image from the captured light beams and an item of metainformation recorded in a data memory cooperating with said processing unit;
• said system further comprising means for determining positioning data of a study scene in the ceiling structure observed through the eyepiece cooperating with the processing unit, said means comprising lands localization means of the optical system and the means for determining the orientation of the objective lens of said optical system.