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

Claim 0:
1. 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 a specific wavelength within the 1000 nm to 2500 nm range, each said channel of the multi-channel pyrometer including:
an interference filter tuned to pass thermal radiation within a specified wavelength range;
a detector for detecting thermal radiation impinging the detector and generating an output;
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, until an interference filter associated with a last one of the channels is reached; and

a subsystem for receiving the output from each of the detectors and determining sensed temperature data therefrom;
at least one of the channels configured to operate within a 1000 nm to 1700 nm wavelength range including a detector formed from germanium; and
at least one of the channels configured to operate within a 1200 nm to at 2500 nm range including a detector formed from Indium Gallium Arsenide.