Method of forming laser diffraction grating for beam sampling device
First Claim
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1. A method of forming a cross product diffraction grating on a surface of a laser mirror for deflecting a sampled beam of predetermined wavelength from a beam incident on said mirror surface and focusing said sampled beam, comprising the steps of:
- generating a zone plate interference pattern for a Gabor-type holographic zone plate, said zone plate pattern having predetermined parameters for focusing deflected radiation at a predetermined position;
generating a linear interference pattern for a first holographic diffraction grating for deflecting a sample beam of optical radiation towards said predetermined position;
forming a cross product interference holographic pattern in a light-sensitive medium by exposing said light-sensitive medium to said interference patterns; and
transferring said cross product holographic interference pattern to said mirror surface, thereby forming said cross product diffraction grating on said mirror surface.
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Abstract
A combined holographic grating that samples a high energy laser beam and focuses the sample into a spot is formed by the cross-modulation term of a linear holographic grating and a holographic zone plate.
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Citations
8 Claims
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1. A method of forming a cross product diffraction grating on a surface of a laser mirror for deflecting a sampled beam of predetermined wavelength from a beam incident on said mirror surface and focusing said sampled beam, comprising the steps of:
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generating a zone plate interference pattern for a Gabor-type holographic zone plate, said zone plate pattern having predetermined parameters for focusing deflected radiation at a predetermined position; generating a linear interference pattern for a first holographic diffraction grating for deflecting a sample beam of optical radiation towards said predetermined position; forming a cross product interference holographic pattern in a light-sensitive medium by exposing said light-sensitive medium to said interference patterns; and transferring said cross product holographic interference pattern to said mirror surface, thereby forming said cross product diffraction grating on said mirror surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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