Fourier moire wavefront sensor
First Claim
1. A wavefront sensor comprising:
- two moiré
gratings in an optical path;
means for optically Fourier transforming a moiré
deflectogram produced by said gratings;
a variably transmitting optical means following said transform means in said optical path; and
a detector receiving an image through said optical means.
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Accused Products
Abstract
An apparatus and method for wavefront sensing that includes: employing two moiré gratings in an optical path; optically Fourier transforming a moiré deflectogram produced by the gratings; variably transmitting the transformed moiré deflectogram; and receiving an image of the variably transmitted and transformed moiré deflectogram. The variable transmission is best accomplished by transmission filter, a transmissive optic encoding intensity information upon the moiré deflectogram as a function of fringe angle. For example, the function can be a triangular transmission function centered on the (0,0) order spatial frequency spot and oriented at 45 degrees to the y-axis. The optical Fourier transform is accomplished by a lens and the variable transmission by an apodized slit.
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Citations
32 Claims
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1. A wavefront sensor comprising:
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two moiré
gratings in an optical path;
means for optically Fourier transforming a moiré
deflectogram produced by said gratings;
a variably transmitting optical means following said transform means in said optical path; and
a detector receiving an image through said optical means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A Fourier moiré
- generating apparatus for wavefront sensing, said apparatus comprising;
two moiré
gratings in an optical path;
optical Fourier transform means following said gratings in said optical path; and
an apodized optical means following said transform means in said optical path. - View Dependent Claims (14, 15, 16)
- generating apparatus for wavefront sensing, said apparatus comprising;
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17. A method for wavefront sensing, the method comprising the steps of:
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employing two moiré
gratings in an optical path;
optically Fourier transforming a moiré
deflectogram produced by the gratings;
variably transmitting the transformed moiré
deflectogram; and
receiving an image of the variably transmitted and transformed moiré
deflectogram.- View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A Fourier moiré
- generating method for wavefront sensing, the method comprising the steps of;
employing two moiré
gratings in an optical path;
employing an optical Fourier transform means following the gratings in the optical path; and
employing an apodized optical means following the transform means in the optical path. - View Dependent Claims (30, 31, 32)
- generating method for wavefront sensing, the method comprising the steps of;
Specification