This device measures properties of body tissue by shining light onto it and then catching the reflected light from the same side. The trick is that the light source and the detector are angled relative to each other or to the tissue surface, specifically by at least two degrees. This angled setup helps gather specific information about the tissue.
Why it matters: Since 2016, advancements in compact, high-sensitivity optical sensors and embedded processing have made precise, angled light measurements for biological properties more practical and cost-effective.
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