The Lumenarium: The official blog of Lumetrics, Inc.

Extended Measurement Range System for the Measurement of Thick Glass

Posted February 01, 2017 by Kristin

A customer approached Lumetrics with a need to measure float glass with a physical thickness of up to 25mm (38mm optical). The standard OptiGauge II is capable of a maximum of approximately 20mm optical thickness. The customer also required a probe with a standoff distance of 150mm while retaining good angular tolerances.

filed under: glass thickness measurement

Precision Wedge Angle Measurement by Lumetrics Principal Scientist, Dr. Michael Marcus

Posted May 23, 2016 by Kristin

A customer approached Lumetrics with a need to determine  and certify the precision wedge angle measurement of low angle wedges in the range of 0.5 - 3.5° with a high degree of accuracy.   A custom fixture was designed and constructed which included x, y, z  and rotation stages with micrometer precision position feedback as shown in the diagram. 

filed under: Dimensional Measurement, glass thickness measurement, Lumetrics, Non-Contact Measurement, Thickness Measurement

Measuring Windshields with Heads up Displays

Posted December 30, 2015 by Kristin
Lumetrics handheld probe holder with 50mm Probe

filed under: glass thickness measurement, heads up display, Lumetrics, multi layer measuremet, Non contact thickness measurement, OptiGauge, Thickness Measurement, windshield glass measurement

Glass Thickness Measurement Using White Light Interferometry: Lumetrics® Vice President Steve Heveron-Smith Explains Why Glass Thickness Measurement is Crucial to a Successful Operation

Posted May 13, 2014 by Kristin

Lumetrics was featured in a Glass International publication about how glass thickness measurement is a critical parameter in a successful operation. Vice President Steve Heveron-Smith described how an all fiber-based interferometer, like Lumetrics' OptiGauge™ can work in different glass applications.


Common methods for measuring glass include laser triangulation, spectrometers, digital micrometers, and manual touch gauges of various types. Manual touch gauges have all the issues inherent to manual measurements including variability based on user, longer time to measure, data integrity, and operator error. Automated gauges like spectrometers, and laser triangulation gauges remove the data integrity and time to measure issues, but often result in issues with set-up and usability.


Lumetrics® has developed an all-fiber based interferometer called the OptiGauge™. Traditional white light interferometers use a mechanical rotating flywheel with mirrors to provide the core function of creating interference fringes- what the system measures. The rotating flywheel is used in conjunction with free space optics, which channel a light beam through a series of mirrors and prisms and then out through an optical fiber to the probe and measured surface. These mirrors can be subject to alignment and use issues over time.


Read the full article here.

filed under: Engineering, glass thickness measurement, Non contact thickness measurement, optical interferometry, Thickness Measurement

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