Optical waveguide with a cladding having lower transmittance in visible than near-infrared wavelength range and its use in an optical touch panel

In an optical touch panel (20) using optical waveguides, a pigment mixture consists of at least 2 kinds of pigments is contained in a clad (14). The pigment mixture has stronger absorption of light in a visible range than in a near-infrared range. Signal beams in the near-infrared range are hardly a...

Full description

Saved in:
Bibliographic Details
Main Authors SHIMIZU, YUSUKE, TOSHIKAWA, SAKURA
Format Patent
LanguageEnglish
French
German
Published 23.11.2011
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Online AccessGet full text

Cover

More Information
Summary:In an optical touch panel (20) using optical waveguides, a pigment mixture consists of at least 2 kinds of pigments is contained in a clad (14). The pigment mixture has stronger absorption of light in a visible range than in a near-infrared range. Signal beams in the near-infrared range are hardly absorbed, although ambient light having entered the clad (14) in the visible range is strongly absorbed. This makes it possible to significantly reduce ambient light in the visible range to enter cores (12) after passing through the clad (14) and it is possible to use the optical touch panel (20) outdoors, either.
Bibliography:Application Number: EP20100163563