Arrays of High Tilt-Angle Micromirrors for Multiobject Spectroscopy

High Density Arrays of Micromirrors

Femtosecond laser fabrication of high reflectivity micromirrors

High-quality freestanding micromirrors consisting of 40 dielectric layers on silicon have been fabricated by ultrashort-pulse laser ablation in combination with laser-assisted wet chemical etching. Backside material removal enables direct access to both faces of the dielectric coating. The amplitude reflectance of the micromirrors has been determined by Fabry–Pérot interferometry; a finesse in ...

Compact Impedance Spectroscopy for High Density Sensor Arrays

Impedance Spectroscopy (IS) is a powerful technique for characterizing materials and interrogating many sensors, particularly within evolving nanotechnologies. The instrumentation to support emerging sensor applications has, however, lagged far behind the materials and sensor development. This paper presents a mixed-signal integrated circuit suitable for chip-scale implementation of IS instrume...

High-speed wavefront control using MEMS micromirrors

In this paper, one type of segmented MEMS mirror is evaluated in detail, particularly with regard to its usable actuation bandwidth. In many emerging applications it is important to operate devices at control bandwidths well above 10kHz. In this paper it is demonstrated that careful design and environmental control can permit actuator bandwidths exceeding 100 kHz. Alternatively, it will be show...

Optimization of tilt angle for solar panel: Case study Tunisia

This paper is a comparisation study between an experimental data and Matlab simulation of output PV characteristic affected by the orientation and the tilt angle of a photovoltaic solar module with inclined plane and by the dimension of the panel. The PV panel was rotated towards the east, south and west and positioned for the angles 0°, 30°, 45°, 60° and 90°. In this position, the values of cu...