Patent ID: 9072439
Filing Date: 2015-07-07
Classification: A61B,F04C,G01N

Abstract:
1. An optical measurement (OM) device, the device comprising: an illumination assembly configured to output light from two or more light sources to a surface portion of a user for measurement; a detection assembly configured to detect the output light from the two or more light sources reflected from said surface portion of the user as a signal; an amplifier module coupled to the detection assembly configured to apply a gain to an alternating-current component of the signal; and a microcontroller coupled to the detection assembly configured to assess a direct-current voltage level of the signal, wherein the microcontroller is configured to control the light output at the illumination assembly based on said assessing the direct-current voltage level such that the alternating-current component of the signal is within a saturation level, upon the amplifier module applying the gain, and wherein the microcontroller is configured to select a gain value for said applying the gain based on said assessing the direct-current voltage level.