Abstract
A new optical component of transmissive faceted structure that allows the reshaping of collimated white light beam is depicted and realized. After being illuminated, each facet element in the structure can slightly tilt along its own axes to deflect the incident light. The calculation of the tilt angles is made by a numerical approach, which is the inverse solution of the analytical relationships between the two-dimensional tilt angles of the facet element and the local coordinates of the outgoing ray on the target plan. For a predefined illumination pattern on a fixed screen, the numerical computation of the 2D tilt angle matrix of the faceted structure is described. In the meantime, a Monte Carlo ray tracing program is created to calculate and verify the irradiance map, all compared with well-recognized commercial illumination software programs. Afterwards, the component is fabricated using an innovative additive technology, inspired by 3D printing and proposed by Luximprint.
Highlights
The shaping of white light beam with high quality is important in non-imaging optics
We propose another original approach based on geometrical optics to allow white light beam shaping and to achieve arbitrary intensity profile on a fixed plan
The refractive index was used at the wavelength of 604 nm which corresponds to the primary wavelength of the source (Ocean Optics HL 2000) employed in our experiment
Summary
The shaping of white light beam with high quality is important in non-imaging optics. We see some faceted structures in micro dimensions called mirror cells arrays fabricated by two photon polymerizations in the recent literature [20,21]. We propose another original approach based on geometrical optics to allow white light beam shaping and to achieve arbitrary intensity profile on a fixed plan. With the reverse solution of the analytical mapping, the 2D tilt angles matrix of the faceted structure can be computed numerically, when a desired illumination pattern is demanded. The realization of the designed component with an innovative technology of 3D Printing proposed by Luximprint [23] is demonstrated
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