CPC G01J 3/50 (2013.01) [G01B 11/24 (2013.01); G01J 3/0208 (2013.01); G01J 3/51 (2013.01)] | 20 Claims |
1. An optical sensing apparatus, comprising:
a light emitter configured to emit an optical signal to a target object;
a first die comprising a photodetector, wherein the photodetector is configured to perform optical sensing and comprising:
a first region configured to detect a first optical signal with a first wavelength, wherein the first optical signal is a first portion of the optical signal reflected by the target object; and
a second region distinct from the first region and configured to detect a second optical signal with a second wavelength which is different from the first wavelength, wherein the second optical signal is a second portion of the optical signal reflected by the target object;
a circuitry, coupled to the photodetector, and configured to perform a first function based on the first optical signal to output a first output result and perform a second function based on the second optical signal to output a second output result; and
a processing circuitry comprising an output circuitry, coupled to the circuitry, and configured to perform a predetermined function based on the first output result and the second output result,
wherein the second wavelength is within SWIR wavelength range, and
wherein the predetermined function comprises a material recognition function that determines one or more characteristics of a material, wherein the one or more characteristics of a material comprise a type of the material.
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