Concept
Focus (optics)
Related publications (32)
Synergy of hyperspectral and microwave remote sensing data to derive bio- and geo-physical parameters for land applications
Retrieval of bio/geophysical variables from remote sensing imagery is an important research field. Due to the development and availability of different EO satellites, especially the ones with hyperspectral sensors, the combined use of radar and optical ima ...
EPFL2015Enhanced resolution in a multimode fiber imaging system
Demetri Psaltis, Christophe Moser, Nicolino Stasio, Grégoire Pierre Jean Laporte
Multimode fibers have recently been demonstrated to be a promising candidate for ultrathin and high resolution endoscopy. However, this method does not offer depth discrimination for fluorescence imaging and the numerical aperture of the fiber limits its r ...
Optical Soc Amer2015Gradient-Based Correction of Chromatic Aberration in the Joint Acquisition of Color and Near-Infrared Images
Sabine Süsstrunk, Yue Lu, Zahra Sadeghipoor Kermani
Chromatic aberration distortions, such as wavelength-dependent blur caused by imperfections in photographic lenses, have long been studied in color imaging. The problem becomes more challenging to solve in the case of color and near-infrared joint acquisit ...
Spie-Int Soc Optical Engineering2015Ultrafast All-Polymer Electrically Tunable Silicone Lenses
Herbert Shea, Samuel Rosset, Luc Maffli, Michele Ghilardi
Dielectric elastomer actuators (DEA) are smart lightweight flexible materials integrating actuation, sensing, and structural functions. The field of DEAs has been progressing rapidly, with actuation strains of over 300% reported, and many application conce ...
Wiley-Blackwell2015Generation of 0.9-mJ THz pulses in DSTMS pumped by a Cr:Mg2SiO4 laser
We report on high-field terahertz transients with 0.9-mJ pulse energy produced in a 400 mm(2) partitioned organic crystal by optical rectification of a 30-mJ laser pulse centered at 1.25 mu m wavelength. The phase-locked single-cycle terahertz pulses cover ...
Optical Society of America2014Electrostatic self-assembly of microsphere lens arrays
Martinus Gijs, Thomas Lehnert, Matteo Cornaglia, Hui Yang
We propose a novel versatile method for the rapid and low-cost fabrication of microsphere arrays to be used as lenses of desired geometry and optical properties. Our method is based on the electrostatic self-assembly of dielectric microspheres in Parylene- ...
2014Silicone as a Multifunctional Material: Ultrafast Tuneable Lenses and Energy Harvesting Based on Silicone Membranes
Herbert Shea, Samuel Rosset, Luc Maffli, Michele Ghilardi
In recent years, the development of soft and stretchable electronics and sensors has seen the wide use of Polydimethylsiloxane (PDMS) as a convenient soft substrate on which such circuits are fabricated. When coupled with compliant electrodes, silicone mem ...
2014Longitudinal-differential phase distribution near the focus of a high numerical aperture lens: Study of wavefront spacing and Gouy phase
Hans Peter Herzig, Toralf Scharf, Myun Sik Kim
We present a longitudinal-differential (LD) phase distribution near the focus of a high numerical aperture (NA=0.9) aplanatic lens illuminated with a linearly polarized monochromatic plane wave. The Richards and Wolf method is used to compute field distrib ...
Taylor & Francis2013The PANOPTIC Camera: A Plenoptic Sensor with Real-Time Omnidirectional Capability
Pierre Vandergheynst, Alexandre Schmid, Luigi Bagnato, Yusuf Leblebici, Laurent Jacques, Hossein Afshari
A new biologically-inspired vision sensor made of one hundred "eyes" is presented, which is suitable for real-time acquisition and processing of 3-D image sequences. This device, named the Panoptic camera, consists of a layered arrangement of approximately ...
Springer Verlag2013