US Patent 10083367 Apparatus for a portable smart device

An accessory is attachable to a portable device equipped with a camera. The accessory includes a camera lens opening and a retainer that retains the portable device such that a lens of the camera of the portable device is aligned with the camera lens opening. At least one source of electromagnetic radiation in the range of ultraviolet and/or blue wavelengths is disposed on the accessory so as to illuminate an object to be authenticated when the object is disposed in front of the camera lens opening of the accessory. A spacer on the accessory positions the accessory with respect to the object to be authenticated so that the camera lens opening has a predetermined positional relationship with a to-be-examined region of the object.