Systems and methods for shaping wavefronts in polychromatic light using phase shifting elements
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United States of America Patent
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Apr 22, 2008
Grant Date -
Mar 23, 2006
app pub date -
Aug 31, 2004
filing date -
Aug 31, 2004
priority date (Note) -
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Abstract
A system for producing polychromatic light having selectively shaped wavefronts includes a source for generating light beams of at least two wavelengths (.lamda..sub.1, .lamda..sub.2). The beams are made up of a plurality of contiguous sub-beams that establish .lamda..sub.1 and .lamda..sub.2 wavefronts. From the source, the light is directed toward an optical phase shifting device which can include one or more arrays, with each array having a plurality of elements. Functionally, within a particular array, each element is independently adjustable to selectively alter the optical pathlength of a corresponding sub-beam. For light having two wavelengths (.lamda..sub.1, .lamda..sub.2), a first array configuration is used to reshape the .lamda..sub.1 wavelength light and a second array configuration is used to reshape the .lamda..sub.2 wavelength light. After wavefront reshaping, the .lamda..sub.1 and .lamda..sub.2 wavelength light is directed onto a common beam path where it can be viewed, imaged or further processed.
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