Design and testing of a Fresnel mirror for solar energy

Design and fabrication of aspheric Fresnel-type lenses for solar energy by using a 3D printer

“…Traditionally for either forming or non-forming images optical systems based on solar energy, FL have been widely studied and successfully implemented in several fields such as photocatalysis degradation and forming images optical systems, because they have a higher concentration ratio than other optical devices. [13][14][15] However, the most significant factors that limit the attainable concentrations are the sun angular size, the chromatic aberration, and the width of the flat sections. In this work we design and fabricate an aspherical Fresnel-type lens with finite groove width and thickness.…”

Design and fabrication of an off-axis Fresnel-type reflector by using 3D printing

“…[4][5][6][7] In fashionable design, the most common Fresnel-type surfaces are flat optical devices that can be calculated by implementing geometrical optics and adding the principles of nonimaging design. [8][9][10][11][12] In view of the above, we propose in this work a procedure to divide an off-axis conic surface, analogous to those we have proposed for other types of surfaces, [13][14][15][16] in order to analytically obtain the parametric equation, which will describe an off-axis Fresnel-type reflector with finite groove width and constant groove depth, 17 in such a way that this representation allows us to implement an exact ray trace considering a plane wavefront incident. In other words, we provide an analytical function to represent the grooves of the Fresnel's surface, to reflect an incoming beam of rays from each echelon, which can be propagated towards a predetermined area of the light collector.…”

Design and fabrication of a linear Fresnel-type reflector for solar concentration based on caustic surfaces by reflection

“…Different methods of sectioning have been implemented such as constant height profile, constant pitch profile and equidistant arc lenght sections. [10][11][12][13][14][15] In the recent years the optics of caustics has been a topic of research for many years. The caustic can be defined as the envelope of a system of orthotomic rays and also as the locus of the principal centers of curvature of a wavefront.…”