Patent ID: 8760637

Claim:
An optical sensing system comprising: a first light source configured to emit light in a first wavelength range; a second light source configured to emit light in a second wavelength range; a single image sensor configured for detecting light emitted from the first and second light sources; a pressure chamber with a flexible diaphragm, the flexible diaphragm having a visually accessible surface; a first optical filter disposed in a first optical path extending between the first light source and the image sensor, the first optical filter configured to pass at least a portion of the light emitted from the first light source in the first wavelength range, and to substantially block the light emitted from the second light source in the second wavelength range, the first optical path including the visually accessible surface; a second optical filter disposed in a second optical path extending between the second light source and the image sensor, the second optical filter configured to pass at least a portion of the light emitted from the second light source in the second wavelength range, and to substantially block the light emitted from the first light source in the first wavelength range, the second optical path including the visually accessible surface; a first optical magnifying element disposed in the first optical path; a second optical magnifying element disposed in the second optical path; wherein an optical magnification of the first optical magnifying element is different than an optical magnification of the second optical magnifying element.