Deflectometry as a technique to assess reflective surfaces has now existed for some 40
years. Its different aspects and variations have been studied in multiple theses and research …

Stock market forecasting is very important in the planning of business activities. Stock price
prediction has attracted many researchers in multiple disciplines including computer …

The surface shape and optical quality of the solar concentrators have a great influence on
the solar power plant efficiency, and there need an accurate, inexpensive and fast tool to do …

The solar collectors represent a considerable part of the concentrated solar power plants, as
their shape and quality determine the level of concentration focused on the receiver …

In this work, a deflectometry based efficient semi-specular surface defect detection system is
developed. This system, when integrated with a robotic arm, can detect defects on large and …

In this work, we present a technique for quantitatively assessing the optical quality of a
parabolic trough solar collector. The presented method is an adaptation of the null-screen …

The Fringe Reflection is a robust and non-contact technique for optical measurement and
specular surface characterization. The periodic alternation between dark and light cycles of …

The optical characteristics of solar concentrators are key factors influencing the overall
efficiency of solar power plants. For instance, heliostats need to be evaluated prior to …

We present a null-screen design for testing the shape quality of the reflecting surface of a
parabolic trough solar collector (PTSC). This technique is inexpensive, the whole surface is …

We describe an experimental procedure for the reconstruction of the geometrical parameters
of a reflecting surface. The method is based on the projection of a luminous pattern …