Descripción
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Manufacturing technologies as injection molding or embossing specify their production limits for minimum radii of the vertices or draft angle for demolding, for instance. These restrictions may limit the system optical efficiency or affect the generation of undesired artifacts on the illumination pattern when dealing with optical design. A novel manufacturing concept is presented here, in which the optical surfaces are not obtained from the usual revolution symmetry with respect to a central axis (z axis), but they are calculated as free-form surfaces describing a spiral trajectory around z axis. The main advantage of this new concept lies in the manufacturing process: a molded piece can be easily separated from its mold just by applying a combination of rotational movement around axis z and linear movement along axis z, even for negative draft angles. The general designing procedure will be described in detail. | |
Internacional
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Si |
Nombre congreso
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Novel Optical Systems Design and Optimization XIV, SPIE Optics + Photonics 2011 |
Tipo de participación
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960 |
Lugar del congreso
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San Diego, EEUU |
Revisores
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Si |
ISBN o ISSN
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0277-786X |
DOI
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http://dx.doi.org/10.1117/12.893707 |
Fecha inicio congreso
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22/08/2011 |
Fecha fin congreso
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22/08/2011 |
Desde la página
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1 |
Hasta la página
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10 |
Título de las actas
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PROCEEDINGS OF SPIE Volume 8129 Proceedings of SPIE, 0277-786X, v. 8129 Novel Optical Systems Design and Optimization XIV |