Scanning illuminating device, imaging device comprising same and method of implementation

A scanning illuminating device comprising:

• an illumination source defining an emission center;
• a collimation element delimiting illumination sector from the emission center in which the emitted radiation is substantially homogenous;
• at least one cylindrical ring portion centered on the source and rotatable about a first axis passing through the emission center,
• the cylindrical ring portion comprising an opaque portion opaque to the radiation and having an angular amplitude α surrounded by two portions transparent transparent to the radiation each having an angular amplitude at minimum equal to that of the illumination sector;
• a cylinder portion centered on the source and rotatable, within a given travel, around a second axis passing through the emission center and forming a non-zero angle relative to the first axis,
• the cylinder portion comprising opaque portion opaque to the radiation that is parallel to the second axis and has an angular amplitude β surrounded by two transparent portions transparent to the radiation each having an angular amplitude at minimum equal to that of the illumination sector delimited by the collimation element,
• a first actuation device for stepwise actuation of the rotation of the cylindrical ring portion defining an elementary angular step αα that is a sub-multiple of the angular amplitude α, such that an integer N1 different from 1 meets the condition α=N1·αα;
• and
• a second actuation device for stepwise actuation of the rotation of the cylindrical ring portion defining an elementary angular step ββ that is a sub-multiple of the amplitude β, such that an integer N2 different from 1 meets the condition β=N2·ββ.