Electromagnetic radiation enhancement methods and systems
First Claim
1. A technique for achieving high relative peak output intensity electromagnetic radiation based on diffraction of said radiation by spatially localized amplitude and phase structures within at least two non-conjugate spatial locations, said technique comprised of the following steps:
- directing incoming electromagnetic radiation onto an optical system, said optical system containing a first and a second spatial location;
modifying a fraction of said electromagnetic radiation within the first spatial location of the optical system by placing optical elements, including spatially localized attenuators and phase structures into a path of the electromagnetic radiation within said first spatial location and causing controlled diffraction of a fraction of said electromagnetic radiation within the first spatial location;
further directing, with one or more optical elements, diffracted and non-diffracted portions of the electromagnetic radiation to a second non-conjugate spatial location along the radiation path;
further modifying a fraction of the electromagnetic radiation at the second spatial location by placing optical elements containing spatially localized phase structures into the electromagnetic radiation path at said second spatial location and causing controlled diffraction of a fraction of said electromagnetic radiation produced within the second spatial location;
further controlling the electromagnetic radiation at the output of the optical system to achieve high relative peak intensity at the output of the optical system by selecting the fractions of the diffracted and the non-diffracted electromagnetic radiation at the said first and second non-conjugate spatial locations;
wherein said second non-conjugate spatial location is placed within the far field region with respect to the said first spatial location; and
wherein the desired properties of the radiation peaks at the output of the optical system are achieved by selecting the relative sizes, shapes, positions, phase delays and/or attenuation levels of the said spatially localized structures within the first and the second spatial locations within the optical system.
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Abstract
An optical system for producing electromagnetic radiation with localized increases in irradiance or radiance at the system output includes a first optical mask containing localized regions for producing controlled modifications of phase delays and/or amplitude attenuations and located within the input plane of said optical system. The system also includes at least a single optical component with positive optical power located after the input plane and at least one additional optical mask located after the optical component at non-conjugate locations with respect to the input plane of the system. The additional optical mask contains localized regions for producing controlled modifications of phase delays. Locally increased radiation distributions are produced at the system output.
15 Citations
33 Claims
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1. A technique for achieving high relative peak output intensity electromagnetic radiation based on diffraction of said radiation by spatially localized amplitude and phase structures within at least two non-conjugate spatial locations, said technique comprised of the following steps:
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directing incoming electromagnetic radiation onto an optical system, said optical system containing a first and a second spatial location; modifying a fraction of said electromagnetic radiation within the first spatial location of the optical system by placing optical elements, including spatially localized attenuators and phase structures into a path of the electromagnetic radiation within said first spatial location and causing controlled diffraction of a fraction of said electromagnetic radiation within the first spatial location; further directing, with one or more optical elements, diffracted and non-diffracted portions of the electromagnetic radiation to a second non-conjugate spatial location along the radiation path; further modifying a fraction of the electromagnetic radiation at the second spatial location by placing optical elements containing spatially localized phase structures into the electromagnetic radiation path at said second spatial location and causing controlled diffraction of a fraction of said electromagnetic radiation produced within the second spatial location; further controlling the electromagnetic radiation at the output of the optical system to achieve high relative peak intensity at the output of the optical system by selecting the fractions of the diffracted and the non-diffracted electromagnetic radiation at the said first and second non-conjugate spatial locations; wherein said second non-conjugate spatial location is placed within the far field region with respect to the said first spatial location; and wherein the desired properties of the radiation peaks at the output of the optical system are achieved by selecting the relative sizes, shapes, positions, phase delays and/or attenuation levels of the said spatially localized structures within the first and the second spatial locations within the optical system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification