Concept
Eyepiece
Related publications (40)
Laser-based manufacturing of freeform glass micro-optics through topological transformation
Glass has been the material of choice for making optical elements, in large part due to its intrinsic properties: a temperature-dependent viscosity, which enables shaping the material into a broad variety of functional and artistic glassware. Silica glass ...
EPFL2024Analytical and Machine Learning Methods for the Complete Safe Coordination of Astrobot Swarms
The recent generations of massive spectroscopic surveys aim at the ray collection from a multitude of cosmological targets in the course of observations. For this purpose, astrobots are used to change the configuration of optical fibers from one observatio ...
EPFL2021Improvements on the uniformity of large-area microlens arrays in Fused Silica
Toralf Scharf, Wilfried Noell, Raoul Kirner, Jeremy Béguelin
The uniformity of large microlens arrays in Fused Silica is governed by the production process. It comprises photolithographic patterning of a spin-coated layer of photoresist on a 200mm wafer with a molten resist reflow process and subsequent dry etching. ...
OPTICAL SOC AMER2019Almost surely constrained convex optimization
Volkan Cevher, Ahmet Alacaoglu
We propose a stochastic gradient framework for solving stochastic composite convex optimization problems with (possibly) infinite number of linear inclusion constraints that need to be satisfied almost surely. We use smoothing and homotopy techniques to ha ...
2019Geometric calibration of Colour and Stereo Surface Imaging System of ESA's Trace Gas Orbiter
François Fleuret, Anton Ivanov, Stepan Tulyakov, Nicolas Thomas, Thomas Weigel
There are many geometric calibration methods for "standard" cameras. These methods, however, cannot be used for the calibration of telescopes with large focal lengths and complex off-axis optics. Moreover, specialized calibration methods for the telescopes ...
Elsevier2018Turning a normal microscope into a super-resolution instrument using a scanning microlens array
We report dielectric microsphere array-based optical super-resolution microscopy. A dielectric microsphere that is placed on a sample is known to generate a virtual image with resolution better than the optical diffraction limit. However, a limitation of s ...
2018Scaling effect and its impact on wavelength-scale microlenses
Hans Peter Herzig, Toralf Scharf, Myun Sik Kim
We revisit the scaling laws in micro-optical systems to highlight new phenomena arising beyond a conventional optical regime, especially when the size of the system approaches to the operational wavelength. Our goal is to visualize the impact of the scalin ...
Spie-Int Soc Optical Engineering2017Super-Resolution Imaging of a Dielectric Microsphere Is Governed by the Waist of Its Photonic Nanojet
Martinus Gijs, Raphaël Etienne Jean Trouillon, Hui Yang, Gergely Huszka
Dielectric microspheres with appropriate refractive index can image objects with super-resolution, that is, with a precision well beyond the classical diffraction limit. A microsphere is also known to generate upon illumination a photonic nanojet, which is ...
American Chemical Society2016Refraction limit of miniaturized optical systems: a ball-lens example
Hans Peter Herzig, Roland Andreas Bitterli, Toralf Scharf, Wilfried Noell, Myun Sik Kim
We study experimentally and theoretically the electromagnetic field in amplitude and phase behind ball-lenses across a wide range of diameters, ranging from a millimeter scale down to a micrometer. Based on the observation, we study the transition between ...
Optical Society of America2016Method and apparatus of using a scanning probe microscope
Adrian Pascal Nievergelt, Jonathan David Adams
a scanning probe microscope for high-speed imaging and/or nanomechanical mapping. The microscope comprises a scanning probe comprising a cantilever with a tip at the distal end; and means for modulating a tip-sample distance separating the tip from an inte ...
2016