Abstract: A sensor device is described. The sensor device comprises a source of fluorescence, wherein said fluorescence is function of a physical phenomenon to be sensed and wherein said fluorescence is generated in response to an excitation provided by a source of excitation; a collector for collecting said fluorescence; a reflector placed around said source of fluorescence to reflect said fluorescence towards said collector, wherein said reflector is provided with an opening at its vertex, the source of fluorescence being arranged within said reflector to sense said physical phenomenon through said opening. A magnetometer comprising said sensor device is also disclosed.

Abstract: The invention relates to a sensor assembly (10) comprising a mounting support (20) and a nitrogen-vacancy diamond (12) connected to at least one optical fiber (22), said mounting support (20) comprising: —a support element (30) having a bottom surface (32) defining a reference plane (P2), and having, at a front end, a socket (36) designed to receive the nitrogen-vacancy diamond (12) in a predetermined angular position (a1) allowing predetermined alignment of its nitrogen-vacancy axis with regards to the reference plane (P2), said socket (36) comprising a recess (40) for housing said nitrogen-vacancy diamond (12) in the predetermined angular position (a1), and —a holder element (50) which is mounted on the support element (30), and which comprises a guiding surface (52) to guide and bend the optical fiber (22) from the nitrogen-vacancy diamond (12) to a rear portion of the holder element (50).

Abstract: The invention relates to a sensor assembly (10) comprising a mounting support (20) and a nitrogen-vacancy diamond (12) connected to at least one optical fiber (22), said mounting support (20) comprising: —a support element (30) having a bottom surface (32) defining a reference plane (P2), and having, at a front end, a socket (36) designed to receive the nitrogen-vacancy diamond (12) in a predetermined angular position (a1) allowing predetermined alignment of its nitrogen-vacancy axis with regards to the reference plane (P2), said socket (36) comprising a recess (40) for housing said nitrogen-vacancy diamond (12) in the predetermined angular position (a1), and —a holder element (50) which is mounted on the support element (30), and which comprises a guiding surface (52) to guide and bend the optical fiber (22) from the nitrogen-vacancy diamond (12) to a rear portion of the holder element (50).