Interferometric Optics introduces its N-Slit Laser Interferometer (NSLI) applicable to:
Assessment of transmission gratings and optical surfaces
Detection of clear air turbulence (CAT)
Interferometric imaging
Interferometric microdensitometry
Interferometric microscopy
N-slit interference
N-slit interferometry
Secure interferometric communications
Based on multiple-prism beam expansion and digital detection the N-slit interferometer allows for the rapid interferometric characterization of transmission optical surfaces in general. A significant advance over traditional point-by-point incoherent microdensitometers and point-by-point incoherent microscopes. Specifications are given in [PDF].
Specific applications include the rapid characterization of:
Arrays of micro holes and/or micro nozzles
Biomedical and organic molecular arrays
Crystalline surfaces
Molecular, and digital, imaging surfaces
Optical surfaces
Textiles
Transmission gratings
Spatial resolution depends on the selected CCD or CMOS detector. As explained in the references, the resolution provided by the detector array can be enhanced, via quantum interferometric calculations, into the submicrometer or nanometer regime thus making the transition from microscope to nanoscope.
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F. J. Duarte and T. S. Taylor, Quantum entanglement physics secures space-to-space interferometric communications,Laser Focus World 51(4), 54-58 (2015).
F. J. Duarte, T. S. Taylor, A. M. Black, and I. E. Olivares, Diffractive patterns superimposed over
propagating N-slit interferograms, J. Mod. Opt. 60, 136-140 (2013).
F. J. Duarte, T. S. Taylor, A. M. Black, W. E. Davenport, and P. G. Varmette, N-slit interferometer for secure free-space optical communications: 527 m intra interferometric path length ,J. Opt. 13, 035710 (2011).
F. J. Duarte, T. S. Taylor, A. B. Clark, and W. E. Davenport, The N-slit interferometer: an extended configuration, J. Opt. 12, 015705 (2010).
F. J. Duarte, Secure interferometric communications in free space: enhanced sensitivity for propagation in the metre range, J. Opt. A: Pure Appl. Opt. 7, 73-75 (2005).
F. J. Duarte and D. J. Paine, Quantum mechanical description of
N-slit interference phenomena, in Proceedings of the International
Conference on Lasers '88, R. C. Sze and F. J. Duarte (Eds.)
(STS, McLean, Va, 1989) pp. 42-47.
F. J. Duarte, Beam shaping with telescopes and multiple-prism beam expanders, J. Opt. Soc. Am. A 4, P30 (1987).