Array projection optics: multi-channel design for ultra slim projectors

Marcel Sieler; Peter Schreiber; Peter Dannberg; Andreas Bräuer

doi:10.1117/12.854457

13 May 2010 Array projection optics: multi-channel design for ultra slim projectors

Marcel Sieler, Peter Schreiber, Peter Dannberg, Andreas Bräuer

Proceedings Volume 7716, Micro-Optics 2010; 77161A (2010) https://doi.org/10.1117/12.854457
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Common projection optics use a single aperture approach to create a magnified image on a screen. The transmitted flux of such systems always scales with their system dimensions thus preventing the realization of ultra compact devices along with a high lumen output. We introduce a new multi-channel approach that breaks this rule and enables the realization of ultra slim, laterally extended projection devices with high flux and integrated homogenization. Array projection optics consists of a regular two-dimensional arrangement of projective microlenses superposing their images on the screen. First we derive the scaling laws of such a multi-channel projector in contrast to common single aperture optics and analyze the system parameters of a single projection channel by Seidel aberration theory. Based on the application of these results to a variable array size the array projection optics are specified. The technological realization of a sample system with still image projection is shown and characterized with respect to modulation transfer and flux.

Citation Download Citation

Marcel Sieler, Peter Schreiber, Peter Dannberg, and Andreas Bräuer "Array projection optics: multi-channel design for ultra slim projectors", Proc. SPIE 7716, Micro-Optics 2010, 77161A (13 May 2010); https://doi.org/10.1117/12.854457

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