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The paper presents the results of a scientific research using an original experimental setup dedicated for studying the influence of surface material and topography on tribological behavior. The experimental setup is provided with a safety clutch with two steel disks. On the frictional disk, permanently maintained, a ferodo ring is bonded. The other disk, with the material to be tested, was changed each time. Silicon microtextured wafers and chromium (non)textured thin layers deposited on silicon wafers were tested. The size and shape of the depressions were varied and their influence on the friction coefficient was studied. The angular speed of driver and driven shaft was measured with two non contact tachometers.

Spectral system (acronym SPECTECH) is designed to meet the following basics: a) to assure measuring tiny optical single lens in a standard configuration; b) configured for reflected or transmitted beam light; c) configured by user off line to monitor manufacturing or mounting optical components; d) to be flexible to be equipped with more than one spectral detector. Initially, it is equipped with two spectral detectors, but in short time to be able to use more than two. e) configured as process spectrophotometer (continuously) to monitor manufacturing or mounting optical components; f) to be updated or upgraded to meet other necessities. SPECTECH system is a modular one, allowing spectral determinations in a wide range of spectrum (385-1100 nm) and with two detectors UV-VIS (190-1100) and NIR (1000-1700nm) the domain can be wider, covering spectrum from 190 to 1700 nm.

This paper explains and demonstrates how to use rapid prototyping to make human sight better compensate by aerial devices in according to optical prescription and facial profile. The paper show a way to improve or match the aerial devices (aka frames) with individual facial characteristics and deliver a customized solution to fit on face and keep device in place for general comfort and better sight. Examples used in this material are realized by authors themselves

The following essay has the purpose to realize and design an optical machine for the study of dental occlusology in order to improve it by establishing the force distribution diagram of the patient's chewing profile, diagrams of great importance for obtaining a great dental work result.