Optical sensing element arrangement with integral package

摘要

A sensor assembly is disclosed that includes a hollow casing having a radiation entrance opening. A radiation-transmissive optic is at the radiation entrance opening. A substrate is inside and sealed against the hollow casing. An optical sensing element is coupled to the substrate and configured to sense radiation that has passed through the radiation-transmissive optic. A method of manufacturing the sensor assembly also is disclosed.

主权项

1. A sensor assembly comprising:
a hollow casing having a radiation entrance opening; a radiation-transmissive optic at the radiation entrance opening, a substrate inside and sealed against an inner surface of the hollow casing; and an optical sensing element coupled to the substrate and configured to sense radiation that has passed through the radiation-transmissive optic, wherein the hollow casing is a single structure that extends from a top of the hollow casing around an edge of the radiation-transmissive optic down to a bottom of the portion of the hollow casing that contains a potting compound, and wherein a portion of the hollow casing that is adhered to an upper surface of the substrate thermally expands and contracts with a portion of the hollow casing that is adhered to an edge of the substrate.