Photopolymer film-based holographic optical element for modification of LED radiation pattern

Norbert Tarjányi; Ľuboš Šušlik; Daniel Káčik

doi:10.1117/12.2265380

31 May 2017 Photopolymer film-based holographic optical element for modification of LED radiation pattern

Norbert Tarjányi, Ľuboš Šušlik, Daniel Káčik

Author Affiliations +

Proceedings Volume 10233, Holography: Advances and Modern Trends V; 102331R (2017) https://doi.org/10.1117/12.2265380
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

We created a record of an optical field formed due to interference of a spherical divergent reference wave and signal plane wave in a self-developing photopolymer film using a He-Ne laser and Mach-Zehnder-like interferometric set-up. Due to Bragg reflections the recorded volume holographic grating acts as holographic lens and transforms the reference divergent wave onto a near-collimated one. After successful recording the diffraction efficiency of the lens is found to be 84% at Bragg angle. The lens is used to modify the radiation pattern of a commercially available red emitting LED. The effect of the holographic lens on the LED’s radiation pattern is investigated by far-field measurement of intensity pattern as function of angle for LED without the lens and with applied holographic lens.

Citation Download Citation

Norbert Tarjányi, Ľuboš Šušlik, and Daniel Káčik "Photopolymer film-based holographic optical element for modification of LED radiation pattern", Proc. SPIE 10233, Holography: Advances and Modern Trends V, 102331R (31 May 2017); https://doi.org/10.1117/12.2265380

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