The Lumenarium: The official blog of Lumetrics, Inc.

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

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

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