A light detection device , comprising: a housing extending along a housing axis between a top surface and a bottom surface , wherein the housing comprises a port disposed in the top surface , wherein the port comprises an opening ; a receptacle disposed within the housing and adapted to receive a sample, wherein the receptacle comprises a receptacle body extending along an optical axis , the receptacle body comprising a first end connected to the opening of the port of the housing and a second end ; a detector disposed within the housing along the optical axis and comprising an input surface adjacent the second end of the receptacle body , wherein the input surface comprises an active area; and a reflector disposed within the housing along the optical axis between the second end of the receptacle body and the input surface of the detector , wherein the reflector comprises an input aperture disposed adjacent the second end of the receptacle body , an output aperture disposed adjacent the input surface of the detector , and a reflective surface that extends between the input aperture and the output aperture ; wherein a cross-sectional area of the output aperture of the reflector is no greater than a surface of the active area of the input surface of the detector , wherein the receptacle further comprises a shutter disposed within the receptacle body between the first end and the second end of the receptacle body , wherein the shutter is adapted to prevent at least a portion of ambient light that enters the housing through the port from being transmitted through the active area of the input surface of the detector when the sample is not disposed within the receptacle . a housing extending along a housing axis between a top surface and a bottom surface , wherein the housing comprises a port disposed in the top surface , wherein the port comprises an opening ; a receptacle disposed within the housing and adapted to receive a sample, wherein the receptacle comprises a receptacle body extending along an optical axis , the receptacle body comprising a first end connected to the opening of the port of the housing and a second end ; a detector disposed within the housing along the optical axis and comprising an input surface adjacent the second end of the receptacle body , wherein the input surface comprises an active area; and a reflector disposed within the housing along the optical axis between the second end of the receptacle body and the input surface of the detector , wherein the reflector comprises an input aperture disposed adjacent the second end of the receptacle body , an output aperture disposed adjacent the input surface of the detector , and a reflective surface that extends between the input aperture and the output aperture ; wherein a cross-sectional area of the output aperture of the reflector is no greater than a surface of the active area of the input surface of the detector , wherein the receptacle further comprises a shutter disposed within the receptacle body between the first end and the second end of the receptacle body , wherein the shutter is adapted to prevent at least a portion of ambient light that enters the housing through the port from being transmitted through the active area of the input surface of the detector when the sample is not disposed within the receptacle . <EOS>