The Lumenarium: The official blog of Lumetrics, Inc.


Recent Posts

OptiGauge Techniques to Measure Thicknesses Below 12 Microns

Posted October 05, 2017 by Kristin

The OptiGauge II is a highly accurate instrument for non-contact light-based thickness measurements of transparent and translucent materials. The instrument is subject to a low measurement limit of 12 microns (for glass). It means that only layers that are above this limit in thickness can be measured accurately to a precision of 0.1 microns. However, in some instances, it is possible to measure thicknesses that are below this limit. For example, it can be done when thin coatings or adhesives are applied to thicker substrates.

filed under: Non contact thickness measurement

Windshield Wedge Angle and Layer Thickness Measurements

Posted September 26, 2017 by Kristin

A small degree of wedge angle has been found useful in minimizing ghosting in automotive windshields with Heads Up Displays (HUD).   The Lumetrics OptiGauge II can measure the thickness of all layers of a laminated windshield simultaneously and is capable of determining the wedge angle as a function of location on the windshield with a high degree of accuracy as well as determining how much wedge is in each layer.

filed under: wedge angle measurement, auto glass inspection, glass inspection

Real-time Non-contact Temperature Monitoring

Posted August 29, 2017 by Kristin

Abstract — Lumetrics has developed a method to monitor the temperature of a fluid by measuring changes in its refractive index. The demonstrated approach can be adapted for online applications to monitor the temperature of fluids in real-time and in a completely non-invasive manner.

filed under: non contact temperature monitoring

Thickness Measurement of Opaque Materials Using Interferometry

Posted August 17, 2017 by Kristin

Abstract— Lumetrics has developed a fixture that expands precision measurement capabilities of the commercialized low-coherence interferometer, OptiGauge II, to materials that are not translucent to its measurement beam light of 1310nm. The fixture contains two probes oriented towards each other and an optical reference surface. The effects of the temperature on the measurement accuracy are eliminated via a calibration procedure conducted before the measurement.

filed under: Non contact thickness measurement, interferometry, opaque materials thickness measurement

Accurate Bow Measurements in Glass Capillary Tube

Posted August 03, 2017 by Kristin

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.

filed under: Non contact thickness measurement, tubing measurement

Materials Cross-Section Using a Low-Coherence Interferometer

Posted July 18, 2017 by Kristin
Abstract — Optical thickness metrology techniques rely on illuminating the sample of interest with light and analyzing the reflections. These techniques work best on objects with smooth surfaces: glass lenses, windows, plastic webs, etc. However, measurement capabilities of such instruments deteriorate in situations where the reflected light is affected by imperfect surfaces, due to optical scattering or absorption. This application note describes a method of obtaining thickness information for such imperfect samples using its optical cross-sectional view acquired in a non-destructive way. The method employs the commercially available instrument, OptiGauge II, which is based on time-domain low-coherence interferometry.

filed under: Non contact thickness measurement, optical thickness measurement, optical metrology

Enhanced Wavefront Analysis Software Improves User Experience and Measurement Capabilities

Posted July 11, 2017 by Kristin

Lumetrics, Inc. (Rochester, NY) has developed the next generation of Complete Light Analysis System (CLAS) software within its line of wavefront sensing instruments. The focus has been on several key elements to enhance the existing feature set of the old software. These enhancements have driven the new software, CLAS-NX, towards a simplified single-window interface that is intuitive and easy to use.

filed under: Wavefront Measurement Articles

Real-time Group Refractive Index Measurement Of Fluids Using Interferometry

Posted June 21, 2017 by Kristin

Abstract — Maintaining proper chemical composition of fluids is an important control parameter for a variety of different production processes. This is especially critical in the medical device manufacturing to maintain high quality standards. One method to monitor fluid composition is to measure its refractive index.

filed under: Non contact thickness measurement, optical thickness measurement, refractive index measurement, interferometry, metrology, liquid refractive index measurement

Automated Dimensional Measurement of Microfluidic Flow Cells

Posted May 31, 2017 by Kristin

Abstract—Lumetrics, Inc. (Rochester, NY) has made inspection of internal dimensions of microfluidic flow cells possible with low-coherence white light interferometry. The OptiGauge II can measure internal channel heights down to 12 microns with 100 nanometer precision quickly and non-destructively. Machine vision-aided inspection stations can quantify other critical dimensions of entire production runs, ensuring higher product quality and that the performance specifications are met.

filed under: Non contact thickness measurement, optical thickness measurement, flow cell, machine vision, interferometry, metrology, microfluidics

Discovery Service From Lumetrics

Posted May 17, 2017 by Kristin

Over the past 15 years Lumetrics has worked closely with many customers to develop custom metrology solutions to meet specific measurement challenges.

filed under: Non contact thickness measurement

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