Highly transparent privacy filter film with image distortion

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We present a novel privacy filter film with transparent micro-cuboid arrays. The privacy filter film, which does not include any opaque materials, rarely affects the normal transparency, whereas it obscures personal information by distorting paths of oblique light rays. The effects of the cuboid size and a gap between the privacy filter and a display are analyzed using a ray-tracing program. The analysis is consistent with the experimental results carried out using the poly-dimethylsiloxane (PDMS) micro-cuboid (100 mu m x 100 mu m x 200 mu m) arrays, which are fabricated by lithography and transfer molding.
Publisher
OPTICAL SOC AMER
Issue Date
2014-12
Language
English
Article Type
Article
Keywords

MICRO-LENS ARRAYS; FABRICATION; LIGHT

Citation

OPTICS EXPRESS, v.22, no.24, pp.29799 - 29804

ISSN
1094-4087
DOI
10.1364/OE.22.029799
URI
http://hdl.handle.net/10203/201061
Appears in Collection
ME-Journal Papers(저널논문)
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