Embedded Concave Micromirror Array-based See-through Light Field Near-eye Display

Park, Hongbae; Hoskinson, Reynald; Stoeber, Boris

doi:10.1145/3355088.3365141

Cited by 1 publication

(1 citation statement)

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“…One advantage of this approach we wish to highlight lies in its simplicity, which can facilitate a seamless integration into other fabrication processes, where formation of a textured surface is needed. As well, such transparent and diffusive surface can be used as a passive lighting panel that can double as a window or a skylight, or as a light source in a transparent near-eye display concept that was introduced previously [19].…”

Section: Introductionmentioning

confidence: 99%

Visually clear diffusive light panel with embedded semi-reflective rough-surface planar outcouplers

Park

Stoeber

2023

J. Micromech. Microeng.

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We present a visually transparent light panel that passively emits diffused light. The panel is a light guide with semi-reflective thin-film blades buried in the panel acting as outcouplers. The semi-reflective blades can be tilted relative to the light panel surface and have a rough surface texture to scatter the light incident upon them while the transmitted light retains its incident angle. We show that the texturization of the blades can be done following a simple photolithographic process involving a polymer photomask. The polymer photomask has embedded micron-scale air bubbles that disturb the exposure intensity distribution. The surface topology of a photoresist film exposed using this photomask becomes rough, which is subsequently used as a mold to create the rough-textured outcoupler blades with a well-defined outline. Alternatively, molding can occur from commercially available rough surfaces with limited opportunities for a customized outline. We demonstrate that prototype light panels are indeed visually clear, and we show that by changing the angle between the incident propagating light rays and tilted semi-reflective blades, the ratio between the amount of emitted light through both surfaces of the panel can be biased.

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Section: Introductionmentioning

confidence: 99%