Insulation device incorporated in an optical wireless communication equipment

An optical module for an optical wireless communication equipment, to be mounted on an electrical board of said optical wireless communication equipment, comprising:

• at least one optical assembly comprising an optical concentrator coupled to a photodetector, to be mounted on a receiving surface of the electrical board;
• an insulation device arranged to be fixed on the electrical board, comprising an enclosure having a height at least equal to a height of the optical assembly, the enclosure comprising in its thickness an opaque material, the insulation device comprising at least one holder located inside the enclosure,
• wherein each optical concentrator has a collecting surface for collecting light rays, a coupling surface for coupling with the photodetector of its optical assembly, and a side surface located between the collecting surface and the coupling surface;
• wherein the insulation device is arranged such that, when the optical module is mounted on the electrical board, the enclosure surrounds the receiving surface so as to insulate the optical assembly from unwanted optical signals, and the optical concentrator is positioned in the holder such that the holder assists in holding the optical concentrator in position in the optical wireless communication equipment;
• and
• wherein:
• the side surface of each optical concentrator is specifically shaped to focus all light rays incident on the collecting surface, until a certain angle which is called the acceptance angle, towards the coupling surface so that these light rays are captured by the photodetector, and
• each holder comprises a side cavity formed in an inner side wall of the enclosure and having a shape complementary to the specific shape of the side surface of the optical concentrator that it receives such that the latter cannot move laterally.