The infrared Oslon black SFH 4725S is a secret agent in more ways than one. Not only does its light have a wavelength of 940 nanometers, making it virtually invisible to the human eye, but its black package reflects almost no ambient light whatsoever. Together with its high optical output of almost one watt, this infrared LED from Osram Opto Semiconductors is the ideal light source for covert surveillance. Concealed security systems – such as those installed in banks, on machinery and at border controls – need to be designed so they are unobtrusive. This is a m...