Patent ID: 8779349
Filing Date: 2014-07-15
Classification: A61B,G01J

Abstract:
1. An apparatus for testing a pulse oximeter, the apparatus comprising: a substrate; a housing surrounding a first portion of the substrate such that a second portion of the substrate extends from the housing, wherein at least a portion of the housing is opaque; at least one first photosensor located on the second portion of the substrate, wherein the at least one first photosensor is configured to receive a light pulse and convert the light pulse into an electrical signal; electronic circuitry configured to receive the electrical signal and to produce an electrical output signal; at least one first light emitting diode located on the second portion of the substrate that extends from the housing, wherein the at least one first light emitting diode is configured to receive the electrical output signal and generate an optical output signal; and a second photosensor aligned with a second light emitting diode, wherein the second photosensor and the second light emitting diode are surrounded by the opaque portion of the housing on the first portion of the substrate such that the opaque portion of the housing separates the second light emitting diode from the at least one first light emitting diode and prevents ambient light from being sensed by the second photosensor, wherein the second light emitting diode is electrically coupled in series to the at least one first light emitting diode such that an optical output generated by the second light emitting diode is representative of the optical output signal generated by the at least one first light emitting diode.