Nonmechanical bifocal zoom telescope

Pouria Valley, Mohammad Reza Dodge, Jim Schwiegerling, Gholam Peyman, N. Peyghambarian

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


We report on a novel zoom lens with no moving parts in the form of a switchable Galilean telescope. This zoom telescope consists of two flat liquid-crystal diffractive lenses with apertures of 10 mm that can each take on the focal lengths of -50 and +100 cm, with a spacing of 50 cm and, hence, a zoom ratio of 4x. The lenses are driven using a low-voltage ac source with 1.6 V and exhibit millisecond switching times. The spectral characteristic of this diffractive zoom system is evaluated for light sources of various bandwidths. Potential applications for this technology include a zoom lens with no moving parts for camera phones and medical imaging devices.

Original languageEnglish (US)
Pages (from-to)2582-2584
Number of pages3
JournalOptics letters
Issue number15
StatePublished - Aug 1 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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