Patent ID: 9696199
Date: 2017-07-04
CPC Classifications: A61B,G01J,H01L,H04B

Claim:
1. An optical sensor module, comprising: a substrate; a light source disposed on the substrate; a first encapsulant formed over the light source; a photodetector disposed on the substrate; a second encapsulant formed over the photodetector; and a partition coupled to the substrate and located between the light source and the photodetector, wherein at least one of the first encapsulant and the second encapsulant comprises multiple different refractive index layers, wherein each refractive index layer has a different refractive index; a first microstructure disposed on a top surface of the first encapsulant, wherein the first microstructure is a set of concave concentric arcs facing towards the photodetector; and a second microstructure disposed on a top surface of the second encapsulant, wherein the second microstructure is a set of concentric circles, wherein light emitted by the light source and passed through the first microstructure and the second microstructure is concentrated toward a direction from the light source toward the photodetector.