The Lumenarium: The official blog of Lumetrics, Inc.

Kristin

Recent Posts

Windshield Wedge Angle and Curvature Measurement Solution

Posted June 26, 2019 by Kristin
As Automotive Glazing technology advances, such as with heads up displays (HUD), the metrology demands associated with manufacturing automotive windshields become more complex.

filed under: Non contact thickness measurement

Transparent armor

Posted June 26, 2019 by Kristin

Abstract: A method of identifying the material and determining the physical thickness of each layer in a multilayer structure is disclosed.The method includes measuring the optical thickness of each of the layers of the multilayer object as a function of wavelength of a light source and calculating a normalized group index of refraction dispersion curve for each layer in the multilayer structure.  The measured normalized group index of refraction dispersion curves for each of the layers is then compared to a reference data base of known materials and the material of each layer is identified.  The physical thickness of each layer is then determined from the group index of refraction dispersion curve for the material in each layer and the measured optical thickness data.  A method for determining the group index of refraction dispersion curve of a known material is also disclosed.

filed under: Non contact thickness measurement

OptiGauge 2000

Posted February 15, 2019 by Kristin

 Lumetrics is pleased to introduce a brand new product to our OptiGauge portfolio: the OptiGauge 2000.  This non-contact thickness measurement system is based on the time-domain low-coherence interferometry. This technology enables absolute thickness measurement of any material, which is transparent or partially transparent to the measurement light. The OG-2000 uses infrared light with the center wavelength of approximately 2 microns. The OG-2000 is designed to measure specialty and rare materials, such as Germanium, Gallium Arsenide, Beryllium, nano-composite optical ceramics and others. Conventional glass and plastic materials can be measured as well. Our patented technology allows for fast real-time measurements, and can be used for on-line process control as well as off-line quality control purposes.

filed under: Non contact thickness measurement

Refractive Index Measurement System for Contact Lens in a Natural Hydrated State

Posted February 01, 2019 by Kristin

A collaboration between Lumetrics and Johnson & Johnson

Accurate refractive index of the contact lenses is one of the most important parameters needed to properly evaluate the lens performance. Measurements of the refractive power and other optical properties of the lenses are typically conducted in solution, and converted to in-air performance. Such an approach is very sensitive to errors in the refractive indices of both the lens and the solution.

filed under: contact lens, contact lens inspection, Non contact thickness measurement, Opthalmic

Using the OptiGauge to measure Automotive Glass

Posted January 31, 2019 by Kristin

 

Automotive Glass Measurement Movie

filed under: auto glass inspection

Glass Slimming Application Note

Posted November 27, 2018 by Kristin

Abstract – LCD and OLED manufacturers can realize improvements in safety, quality, and production when utilizing Lumetrics’ technology to measure and control the glass slimming process. The OptiGauge II ® allows accurate real-time glass thickness monitoring during the acid etching process.

filed under: Non contact thickness measurement, glass inspection

Optical Thickness Measurement of Multilayer Films

Posted September 10, 2018 by Kristin

Abstract — Manufacturers of multi-layer films can realize significant cost savings, product quality improvements, and reduce the risk of product failures by accurately measuring individual layer thicknesses of multi-layer materials instead of relying on gauging that can only provide total thickness. 

filed under: Thickness Measurement, Thin Film Coating, film thickness measurement, optical metrology

Lumetrics' Latest Patent

Posted July 12, 2018 by Kristin

On June 26th, 2018, Lumetrics was awarded a new patent for “Associated Interferometers Using Multi-Fiber Delay Lines.” An interferometer apparatus which include two or more coupled fiber optic Michelson interferometers using fiber optic stretches which stretch two or more optical fibers wound around the perimeter of the optical fiber stretchers by the same amount is disclosed. Preferably a pair of reference and sample fiber optic stretches are utilized which run in a push-pull mode of operation. When one of the interferometers is a coherent light interferometer it can be used as a reference distance scale for all of the remaining low coherence light interferometer. A method for measuring a physical property of a device under test is also disclosed using the apparatus of the present invention. This patent allows the user to measure optical thickness at multiple locations on a sample or in a manufacturing line simultaneously with a single measuring instrument without the need of an optical switch. This enables faster measurement and continuous measurement capability 100% of the time.

filed under: interferometry

Testing Windshield Wedge Using Shack-Hartmann Wavefront Sensor

Posted May 01, 2018 by Kristin

The windshield has become an increasingly complex component of an automobile requiring the latest metrology tools to meet the demands of the world’s leading automotive manufacturers. While limited to more expense vehicles today, Heads Up Display’s (HUD) will continue to increase in popularity as they help drivers focus on driving.

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

New Patent Method Allowed

Posted February 28, 2018 by Kristin

Lumetrics was granted a patent allowance for the technology used to measure a contact lens using the ClearWave™ plus. This patent allowance works in tandem with two previous patent filings that Lumetrics was awarded concerning the apparatus of measurement.

The ClearWave Plus uses a modified ClearWave in combination with the industry standard OptiGauge® thickness measurement system. This provides contact lens manufacturers center thickness (CT), Sagittal Height (SAG), diameter, radius of curvature, and all the wavefront measurements that currently require three separate systems to obtain.

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