Apparatus and method for optical wavefront analysis using active light modulation
First Claim
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1. An apparatus for analyzing variance of an optical wavefront comprising:
- an active light modulation device having a multiplicity of elements for dissecting a portion of the wavefront into a plurality of subfronts;
a detector for measuring the optical flux of a subset of the plurality of subfronts; and
, a central processing unit programmed to calculate the variance of the portion of the wavefront using optical flux measurements from the detector.
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Abstract
Apparatus and method for measuring wavefront slope and irradiance of direct and/or reflected light beams at a plurality of points to enable calculation of optical wave front distortions. A plurality of sub-beams or groups of sub-beams is created and controlled using at least one electronically-controlled Active Light Modulation Device (“ALMD”).
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Citations
34 Claims
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1. An apparatus for analyzing variance of an optical wavefront comprising:
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an active light modulation device having a multiplicity of elements for dissecting a portion of the wavefront into a plurality of subfronts;
a detector for measuring the optical flux of a subset of the plurality of subfronts; and
,a central processing unit programmed to calculate the variance of the portion of the wavefront using optical flux measurements from the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for analyzing variance of an optical wavefront comprising the steps of:
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dissecting at least a portion of the wavefront into a plurality of subfronts using an active light modulation device having a multiplicity of elements;
measuring the optical flux of a subset of the plurality of subfronts using a detector; and
,calculating the variance of the portion of the wavefront using the optical flux measurements from the detector. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for analyzing variance of an optical wavefront comprising the steps of:
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dissecting at least a portion of the wavefront into a plurality of subfronts using a first active light modulation device having a multiplicity of elements;
expanding at least one subset of the plurality of subfronts using a second active light modulation device having a second multiplicity of elements;
measuring the optical flux of at least a subset of the expanded subfronts using a detector; and
,calculating the variance of the portion of the wavefront using optical flux measurements from the detector. - View Dependent Claims (26, 27, 28, 29, 30, 32, 33, 34)
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31. The method of 25 further comprising the step of disposing at least one of the multiplicity of elements of the first or second active light modulation device in an image dissection pattern that is generated by modifying a pre-determined image dissection pattern in accordance with the calculated variance.
Specification