Touch sensor using optical fiber

Details Touch sensor using optical fiber Touch sensor using optical fiber

2007-07-27

2008-11-04

Thompson, Jewel V (Department: 2855)

Measuring and testing

Dynamometers

Responsive to multiple loads or load components

Reexamination Certificate

active

07444887

ABSTRACT:
In a touch sensor, one ends of optical fibers are disposed at positions corresponding to respective pressure sensing points on a sensor sheet. The optical fibers in a bundled form are connected in a detection unit. The detection unit includes therein a camera that takes an image showing a change in luminance at the other ends of the optical fibers. A transmissive body is disposed to contain the other ends of the optical fibers and light sources. Upper and side faces of the transmissive body are covered with antireflection members. The transmissive body has substantially the same refractive index as the core of each optical fiber. A force applied to the sensor sheet is detected based on the change in luminance at the other ends of the optical fibers shown in the image taken by the camera.

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patent: 2002-507279 (2002-03-01), None
esp@cenet patent abstract for International Publication No. WO 99/04234, Publication date Jan. 28, 1999 (1 page).

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