# Fiber optic web edge sensor 

> A web edge sensor is disclosed. The web edge sensor has a light source directing light incident to an edge of a web. The edge of the web scatters the light and a sensor array that detects a first portion of the light scattered from the edge of the web and rejects a second portion to determine a…

**Last updated:** 2025-12-29

**Source:** https://r2r.tech/articles/fiber-optic-web-edge-sensor

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### Authors

 Prabhakar Pagilla, Aravind Seshadri

### Publication Information

 US Patent: US8324604
 Priority date: Nov 9, 2006
 Publication date: Dec 4, 2012

### Abstract

 A web edge sensor is disclosed. The web edge sensor has a light source directing light incident to an edge of a web. The edge of the web scatters the light and a sensor array that detects a first portion of the light scattered from the edge of the web and rejects a second portion to determine a position of the web edge.

[Link to the article](https://www.google.com/patents/US8324604)

**Tags:** web edge sensor, web edge position, fiber optic sensor, light scattering

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## About Roll-2-Roll Technologies

Roll-2-Roll Technologies designs and manufactures patented fiber-optic web position sensors and advanced web guiding controllers — the precision measurement and control core of modern roll-to-roll manufacturing. Spun out of Oklahoma State University's Web Handling Research Center and trusted by Fortune 500 medical, battery, and nonwovens manufacturers, our patented sensors work without recalibration, with 0.0635 mm resolution and ±0.127 mm repeatability at line speeds up to 760 m/min — typical customer outcomes are 50%+ less downtime and payback under six months. Headquartered in Stillwater, Oklahoma, our team of PhDs, controls engineers, and industry veterans extends the sensor + controller core into complete web guide systems including stepper-motor-based linear actuators (RLA, BLA, LHS).

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