Patent ID: 11933675
Assignee: LAWRENCE LIVERMORE NATIONAL SECURITY, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A system for sensing temperature changes on a microsecond scale, the system including:
a multi-channel pyrometer configured to operate within a wavelength range of about 1000 nm to 2500 nm, and to receive thermal radiation, each said channel of the multi-channel pyrometer being tuned to operate at specific wavelength within the 1000 nm to 2500 nm range, each said channel of the multi-channel pyrometer and including:
an interference filter tuned to pass thermal radiation within a specified wavelength range, and at a specified center wavelength;
an objective lens; and
a solid-state detector for detecting thermal radiation focused on the detector by the objective lens;
the interference filter operating to reflect thermal radiation which does not pass through the interference filter to a subsequent downstream interference filter of a subsequent channel of the multi-channel pyrometer, with each said subsequent interference filter being oriented to reflect the thermal radiation not passing therethrough to a next downstream one of the subsequent interference filters;
a power supply for powering a specific one of the solid-state detectors;

an analog-to-digital (ND) converter for receiving an output from the solid-state detector of each one of the channels of the multi-channel pyrometer; and
an interface subsystem for interfacing an output of the A/D converter to a subsystem for analysis and determination of temperature data being sensed by each one of the solid-state detectors;
at least a first subplurality of the channels being configured to operate within a 1000 nm to 1700 nm wavelength range, and including detectors formed from germanium; and
at least a second subplurality of the channels being configured to operate within a 1200 nm to at 2500 nm wavelength range, and including detectors formed from Indium Gallium Arsenide.