Apparatus and method for making flexible waveguide...

Details Apparatus and method for making flexible waveguide... Apparatus and method for making flexible waveguide...

2004-08-20

2008-08-12

Sanghavi, Hemang (Department: 2874)

Optical waveguides

Integrated optical circuit

C385S129000, C345S173000, C345S175000, C345S176000

Reexamination Certificate

active

07412119

ABSTRACT:
Flexible optical waveguide substrates that can be used with touch screen displays. The waveguide substrates include a flexible base material. A first optical layer having a first index of refraction value is formed on the flexible base material. A second optical layer is then formed on the first optical layer, the second optical layer being patterned to form a plurality of optical elements and waveguides respectively. The second optical layer also has a second index of refraction value higher than the first index of refraction value. Lastly, a third optical layer is formed on the second optical layer. The third optical layer has a third index of refraction value lower than the second index of refraction value. The high N second layer is therefore sandwiched between the lower N first and third layers, creating an internally reflective surface wherever the high N and low N materials are in contact. The base material and first, second and third optical layers thus form a flexible waveguide substrate.

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