6/19/2023 0 Comments Antetype examples![]() ![]() This concerns especially software tools for the generation The microlens arrays are fabricated using reflow of photoresist or laser lithography which had to be adapted to the specifics of cMLAs. Fly's eye condensers based on cMLAs are especially advantageous when dealing with short pulseĪpplications such as in sensing or material processing since otherwise applicable homogeneity improving measures are not suitable. This leads to an improved homogeneity of the radiation. The periodic intensity peaks appearing in the plane of homogenization which are typical when using regular arrays can be avoided byĮmploying non-periodic arrays. Lenses of the array that leads to novel coherent effects. In contrast to the application examples mentioned before, here the focus is on the collective interaction of all For the rst time, the use of a cMLA with individually adapted lenses allows the fabrication of objectives based on the well-known imaging principle that areĬompliant to the demands of industrial applications rather than just being proof-of-principle demonstrators.įurthermore, a fly's eye condenser setup based on cMLAs is discussed. ![]() The use of a cMLA allows the correction of off-axis aberrations and consequently the extension of the field of view of the objective, whereas the array describing function canīe derived analytically. The latter enables extremely thin imaging objectives with a track length shorter than 250µm that have their natural antetype in the compound eyes Applications in the field of beam shaping and miniaturized imaging optics areĭiscussed in detail as example systems. The improvement of the system's integration and the optimization of the optical performance of a system. Theįocus of this thesis is to point out the potentials of these new design possibilities which are explained by example systems built as prototypes. Overcoming the inflexibility of a regular arrangement leads to the enhancement of the classical array concept and enables new degrees of freedom in the design of micro-optical systems. Dependency on the position of the cell within the array is the most characteristic property of these functions. Optimization techniques, or by a combination of the both. The parameters of each cell can be defined by analytical functions, by using numerical In contrast to conventional, regular microlens arrays that consist of a repetitive arrangement of a unit cell on a fixed, equidistantly sectioned grid,Ī cMLA contains similar but not identical lenses that are defined by a parametric description. The presented thesis deals with the design, the fabrication, and the characterization of nonregular microlens arrays that are referred to as "chirped microlens array" (cMLA) in accordance ![]()
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