Sensor array spectrometer

US11802795B2 · kind B2 · utility

Assignee

• 3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

• John A. Wheatley · Stillwater, US
• Mark A. Roehrig · Stillwater, US
• Del R. Lawson · Cottage Grove, US
• Tony J. Kaufman · Rosemount, US
• James W. Howard · Circle Pines, US
• Kevin W. Gotrik · Hudson, US
• Claire R. Donoghue · Reading, GB
• Joshua M. Fishman · Minneapolis, US
• Jonah Shaver · Okabena, US

Key dates

• Filing date: Apr 1, 2020
• Grant date: Oct 31, 2023
• Expiry date: Apr 10, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/20
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An optical system is disclosed and includes an optical sensor, a plurality of photosensitive pixels disposed on the optical sensor, a wavelength-selective optical filter in optical communication with the photosensitive pixels, the wavelength-selective optical filter being disposed remotely from the optical sensor, an area disposed in the wavelength-selective optical filter, the area having a transmission spectrum different from a transmission spectrum of a portion of the wavelength-selective optical filter not in the area and a reflector, the wavelength-selective optical filter and a measurement subject each being disposed between the reflector and the optical sensor along an optical path.