---
title: Accurate Bow Measurements in Glass Capillary Tube
description: Accurate Bow Measurements in Glass Capillary Tube
---

[Blog | Lumetrics ](https://www.lumetrics.com/blog)

# [Accurate Bow Measurements in Glass Capillary Tube](https://www.lumetrics.com/blog/accurate-bow-measurements-in-glass-capillary-tube-blog)

 Written by [Kristin Hart Daly](https://www.lumetrics.com/blog/author/kristin-hart-daly) | August 3, 2017

*Abstract *— High quality glass tubing production relies on tightly controlled manufacturing processes. With the addition of a Reference Signal Generator (RSG), the OptiGauge II can aid the control of the straightness of the tube by measuring its bow.

Lumetrics’ low coherence interferometer, commercially marketed as the OptiGauge® II, is a device capable of measuring tubing wall thickness, inner diameter, outer diameter, and bow with sub-micron precision. Combined with custom software and a precision rotation adjustment stage, a tube can be characterized in terms of wall thickness, ID, OD, bow, concentricity, and ovality during both the incoming material inspection and outgoing product quality control.

 

 

 

[View full post](https://www.lumetrics.com/blog/accurate-bow-measurements-in-glass-capillary-tube-blog)

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