Hemispherical digital optical condensers with no lenses, mirrors, or moving parts

Daniel Dominguez, Luis Molina, Darshan B. Desai, Trevor O. Loughlin, Ayrton A. Bernussi, Luis Grave De Peralta

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We present a simple method for obtaining direct non-scanning images in the far-field with subwavelength resolution. Our approach relies on the use of a digital optical condenser comprised of an array of light emitting diodes uniformly distributed inside of a hollow hemisphere. We demonstrate experimental observation of minimum feature sizes of the order of λ/6 with the proposed technique. Although our experiments were performed at visible frequencies, we anticipate that the proposed approach to subwavelength resolution can be extended to the ultraviolet and infrared spectral regions.

Original languageEnglish
Pages (from-to)6948-6957
Number of pages10
JournalOptics Express
Issue number6
StatePublished - 2014


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