Optical waveguide for touch panel

Details Optical waveguide for touch panel Optical waveguide for touch panel

2011-01-18

2011-01-18

Petkovsek, Daniel (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S014000, C385S131000, C345S175000, C345S176000

Reexamination Certificate

active

07873247

ABSTRACT:
An optical waveguide for a touch panel which includes a planar base; light emitting cores and light incident cores provided on a surface of the base; and an over-cladding layer covering the cores. The light emitting core has a first lens portion provided at the end thereof for suppressing lateral divergence of the emitted light beam, the over-cladding layer has a second lens portion provided in an edge portion thereof covering the end of the light emitting core for suppressing vertical divergence of the emitted light beam, the over-cladding layer has a third lens portion provided in an edge portion thereof covering the end of the light incident core for vertically converging the incident light beam, and the light incident core has a fourth lens portion provided at the end thereof for further laterally converging the incident light beam.

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European Search Report dated Oct. 7, 2009, issued in corresponding European Patent Application No. 08002372.

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