Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Reexamination Certificate
2007-05-22
2007-05-22
Boutsikaris, Leonidas (Department: 2872)
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
C430S001000
Reexamination Certificate
active
11406452
ABSTRACT:
Narrow-line holographic filters that can include a plurality of lines and that can be structured to provide a large aperture device. Materials that can be used to construct filters include glasses, photorefractive crystals such as lithium niobate and photorefractive thick polymers. The filters are fabricated by assembling a plurality of elements having the same one or more narrow line holographic filter patterns written thereon, in mutual orientation such that each element has a surface defined by a length and a width adjacent a corresponding surface of a neighboring element, and has a surface defined by a thickness and one of a length and a width accessible to impinging illumination. Filters exhibiting a plurality of characteristic narrow lines, and having arbitrarily large apertures can be fabricated. Methods of fabricating and using the filters are described.
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Blais-Ouellette Sebastien
Matthews Keith
Moser Christophe
Boutsikaris Leonidas
California Institute of Technology
Hiscock & Barclay LLP
Milstein Joseph B.
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