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US 11,454,538 B1Granted
Calibration devices and techniques using a radiometric transformation applied to a measurement providing for a simulated measurement
AssigneeWavefront Research, Inc.
InventorThomas A. Mitchell
Life of this patent
Estimating the term…
Abstract
An alternate calibration device and method for calibration of optical sensors having a reduced size, weight, and power (SWaP) as well as increasing the sensors modularity and potentially improving the accuracy and stability of its radiometric calibration.
Claims9
A calibrated optical system comprising:
- an optical system comprising a detector, enabling measuring input radiance from two different sources;
- a first source;
- said first source positioned in a first spatial location;
- said optical system, when configured to image radiation from the first source onto the detector, providing a first measurement of the input radiance of said first source;
- a second source;
- said second source positioned in a second spatial location;
- said first spatial location and said second spatial location not being a same location;
- said optical system, when configured to image radiation from the second source onto the detector, providing a second measurement of the input radiance of said second source;
- said optical system further providing a third measurement of the input radiance of said second source;
- wherein a radiometric transform is obtained from said first measurement of the input radiance of said first source and said second measurement of the input radiance of said second source;
- said radiometric transform being a linear transform between two spaces;
- said radiometric transform comprising a linear ratio term and an offset term;
- a processor;
- said processor providing a simulated fourth measurement of the input radiance of said first source by applying said radiometric transform to said third measurement of the input radiance of said second source.
11 more elements
A calibrated optical system comprising:
- an optical system comprising a detector, said detector enabling measuring input radiance from two different sources;
- a first source;
- said first source positioned in a first spatial location external to said optical system;
- said optical system, when configured to image radiation from the first source onto the detector, providing at least one measurement of the input radiance of said first source;
- a second source;
- said second source positioned in a second spatial location internal to said optical system;
- said optical system, when configured to image radiation from the second source onto the detector, providing at least one measurement of the input radiance of said second source;
- wherein a radiometric transform is obtained from said at least one measurement of the input radiance of said first source and said at least one measurement of the input radiance of said second source;
- said optical system further providing a second measurement of the input radiance of said second source;
- a processor;
- said processor providing a simulated second measurement of the input radiance of said first source by applying said radiometric transform to said second measurement of the input radiance of said second source.
8 more elements
Dependencies are inferred from the claim text.