Optical aberration detection systems
AssigneeRegents of the University of Minnesota
InventorsJoseph Talghader, Merlin Lyn Mah
Life of this patent
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Abstract
A system includes a detector and a computing device communicatively coupled to the detector. The detector detects spatial or temporal spectral features of a light beam after transmission of the light beam through a turbulent or aberrated medium and generate a measurement signal indicative of the spectral feature. The computing device receives the measurement signal and a comparative signal indicative of a spectral feature of the light beam prior to or after transmission of the light beam through the medium. The computing device compares the measurement signal and the comparative signal and determines, based on the comparison of the measurement signal and the comparative signal, one or more values related to variations in refractive indices of the medium.
Claims31
A system, comprising:
- an optical cavity;
- one or more detectors configured to:
- detect an intensity of a spectral region of a light beam after transmission of the light beam through a turbulent or aberrated medium and the optical cavity;
- and
- generate a measurement signal indicative of the intensity of the spectral region;
- and
- a computing device configured to:
- receive, from at least one of the one or more detectors, a first measurement signal indicative of an intensity of a first spectral range of spatial or temporal frequencies of a first spectral region of the light beam;
- receive, from at least one of the one or more detectors, a second measurement signal indicative of an intensity of a second spectral range of spatial or temporal frequencies of a second spectral region of the light beam, different from the first spectral range;
- compare the first measurement signal and the second measurement signal;
- and
- determine, based on the comparison of the first measurement signal and the second measurement signal, one or more values related to variations in a refractive index of the medium.
A method, comprising:
- detecting, using one or more detectors, an intensity a first spectral region of a light beam at a first spectral range of spatial or temporal frequencies after transmission through a turbulent or aberrated medium and an optical cavity;
- detecting, using the one or more detectors, an intensity of a second spectral region of a light beam at a second spectral range of spatial or temporal frequencies
- generating, by at least one detector of the one or more detectors, a first measurement signal indicative of the first spectral region of the light beam and a second measurement signal indicative of the second spectral region of the light beam;
- receiving, by a computing device, the first measurement signal and the second measurement signal;
- comparing, by the computing device, the first measurement signal and the second measurement signal;
- and
- determining, by the computing device and based on the comparison of the first measurement signal and the second measurement signal, one or more values related to variations in a refractive index of the medium.
Dependencies are inferred from the claim text.