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US 8,542,359 B2Granted
Digital filter spectrum sensor
AssigneeNanoLambda, Inc.
InventorsByung Il Choi, Byounghee Lee
Life of this patent
Estimating the term…
Abstract
A spectrum sensing method includes (a) receiving an incident radiation simultaneously through a filter array composed of multiple bandpass filters, (b) digitizing spectral responses of the filter array, and (c) generating an estimate of spectral profile of the incident radiation based on digitized spectral responses of the filter array.
Claims5
A method for spectral resolution enhancement for spectrum sensor, comprising:
- (a) receiving an incident radiation at a photodetector array through a filter array composed of multiple bandpass filters;
- (b) digitizing spectral responses of the filter array;
- and
- (c) enhancing a spectral resolution using at least one of the following operations:
- Least Square estimate process, matrix inversion, equalization or pseudoinverse matrix manipulation of the digitized spectral responses of the filter array;
- wherein each filter of the filter array comprises a broadband filter;
- and
- wherein the spectral responses of different filters are independent with different peaks and dips, and distributed over an entire target spectrum ranges, and partially overlapped with multiple filters within the array.
5 more elements
A spectrum sensor, comprising:
- a photodetector array;
- an array of optical filters;
- and
- a processing unit having stored thereon processor-executable instructions configured to cause the processing unit to generate an estimated spectral profile of input light using at least one of matrix inversion, Least Square estimate, equalization or pseudoinverse operations for spectral resolution enhancement;
- wherein each filter of the filter array comprises a broadband filter;
- and
- wherein the spectral responses of different filters are independent with different peaks and dips, and distributed over an entire target spectrum ranges, and partially overlapped with multiple filters within the array.
4 more elements
Dependencies are inferred from the claim text.