| US 7,515,319 B2 | ||
| Lens-less spectrometer | ||
| Ali Adibi, Suwanee, Ga. (US); Chao Ray Hsieh, Atlanta, Ga. (US); Arash Karbaschi, Smyrna, Ga. (US); and Omid Momtahan, Foothill Ranch, Calif. (US) | ||
| Assigned to Georgia Tech Research corp., Atlanta, Ga. (US) | ||
| Filed on Jul. 21, 2006, as Appl. No. 11/459,114. | ||
| Claims priority of provisional application 60/701872, filed on Jul. 22, 2005. | ||
| Prior Publication US 2007/0019263 A1, Jan. 25, 2007 | ||
| Int. Cl. G02B 5/32 (2006.01); G01J 3/28 (2006.01) | ||
| U.S. Cl. 359—19 [359/15; 359/900; 356/328] | 14 Claims |
| 1. A method of implementing a lens-less spectrometer, comprising the steps of:
producing a spherical beam volume hologram that is recorded by one converging spherical beam and one diverging spherical beam,
the spherical beam volume hologram capable of performing a Fourier-transformation on an incident optical signal without aid
of an external lens;
positioning an input port of the lens-less spectrometer along a direction of the diverging spherical beam; and
positioning an output port of the lens-less spectrometer along a direction of the converging spherical beam.
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