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公开(公告)号：US20240393500A1
公开(公告)日：2024-11-28
申请号：US18202418
申请日：2023-05-26
Applicant: STMicroelectronics International N.V.
Abstract: A metasurface optic, designed for short-wave infrared (SWIR) range devices, is formed of one or more unit cells with a specific arrangement of truncated cone-shaped subwavelength nanostructures, tailored to achieve various optical functionalities. The one or more unit cells are formed from a design set selected from among multiple different design sets, each of the multiple different design sets featuring truncated cones having a unique combination of height (800 nm to 1100 nm), sidewall angle (91° to) 93°, and pitch (550 nm to 750 nm), with base radius values of the truncated cones within a given design set varying from 75 nm to 250 nm in 1 nm increments.
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公开(公告)号：US20250109983A1
公开(公告)日：2025-04-03
申请号：US18476551
申请日：2023-09-28
Applicant: STMicroelectronics International N.V.
Inventor： Calum RITCHIE , Colin CAMPBELL , Matteo FISSORE
Abstract: Various embodiments are directed to an optical sensor configured to transmit and receive optical radiation while minimizing optical noise, such as crosstalk. An example optical sensor includes an optical radiation source configured to direct optical radiation at a target object, an optical radiation receiver configured to receive reflected optical radiation off the target object, and a housing cap. The housing cap includes a transmission opening having a lower portion and an upper portion positioned to direct optical radiation toward the target object, and a receiving opening positioned to received reflected optical radiation. A first portion of the upper portion of the transmission opening includes a vertical surface that is substantially parallel to an optical transmission axis. A second portion of the upper portion of the transmission opening comprises an angled surface, progressing into the transmission opening from an outer surface of the housing cap at a transmission opening angle.
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