The Lumenarium: The official blog of Lumetrics, Inc.

Vision Accomplished: The Bionic Eye

Posted April 04, 2017 by Kristin

An interesting article from the most recent issue of Optics and Photonics News discusses ophthalmic prosthetic devices to help those who suffer from diseases that cause loss of eyesight:

Measurement of Film Stacks

Posted March 30, 2017 by Kristin
The field of touchscreen technology is undergoing an explosive growth and development. It is
difficult to imagine a personal life without a smartphone, a tablet, or some other touchscreen device.  Laptops and desktops alike have acquired touchscreen capabilities. With high pace of the consumer electronics market, there is significa
nt pressure on all aspects of touchscreen business, from improvements in technology, to improvements in quality control, to marketing.  Read More

filed under: multi layer thickness measurement, film thickness measurement

Measurement of a Lens Stack

Posted March 30, 2017 by Kristin

The camera lens stack manufacturing process relies heavily on polished lenses that have precise thicknesses and distances between individual lenses.

filed under: multi layer thickness measurement, Non contact thickness measurement, lens measurement

Spherical Aberration Standards and Measurement System Stability Over Time

Posted March 01, 2017 by Kristin

A Shack-Hartmann wave-front sensor system has been used to measure a set of plano-convex lenses at two different times, separated by almost 2 years. The plano-convex lenses were selected to cover a range of powers and apertures relevant to intraocular lenses, and were measured at two different orientations. The results demonstrate the high temporal stability of the measurement system, as well as of the glass standard.

filed under: Thickness Measurement

Optical Thickness Measurement of Coronary Balloons and Medical Tubing

Posted February 15, 2017 by Kristin

Medical device manufacturers often struggle when inspecting balloons, tubes, stents, and other medical products with many simplistic measurement devices in use today. There are limitations when using micrometers, microscopes, pin gauges, and razor blades that limit accuracy, repeatability, and general ease-of-use.

filed under: medical balloons, Thickness Measurement

Online multilayer film system

Posted February 07, 2017 by Kristin

A customer presented Lumetrics with a 5 layer product constructed of a liner, adhesive, middle layer, adhesive and a liner.  The product is made in two operations.  The first operation coats the liner with adhesive then adds the middle layer.  The second operation adds adhesive to the middle layer and then adds the final  liner.

The ability to control the adhesive layer was a critical parameter.  The customer needed to know the adhesive thickness when applied in a wet state and again when cured in a dry state.

filed under: multi layer thickness measurement, film thickness measurement

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

Lumetrics Granted New Patent: Toric Intraocular Lens Measurement Apparatus and Method

Posted January 26, 2017 by Kristin
This latest Lumetrics patent is for a device to physically rotate an intraocular lens inside the confined space afforded in a measurement cuvette.  There are times when rotating the data gathered using software is insufficient and the sample must physically be rotated.  This device maintains the alignment of  intraocular lens optical axis with that of the measurement device with which it is paired.  During the rotation the need for realignment is reduced or eliminated.  Read more about this new patent here.

filed under: Non-Contact Measurement

Optical Thickness and Flatness Measurement of Bonded Silicon Wafer Assemblies

Posted January 18, 2017 by Kristin

AbstractThe silicon wafer manufacturing process relies heavily on precision polished wafers that have uniform thickness and, depending on the application, also control parallelism to a secondary wafer after bonding.
Lumetrics’ low coherence interferometer, commercially marketed as OptiGauge II, is a device capable of measuring the simultaneous wafer thickness, adhesive thickness, and parallelism between surfaces to sub-micron precision. Combined with custom software and a precision XY raster scanner, a wafer or wafer assembly can be fully characterized with respect to layer thicknesses and surface parallelism.
Index Terms—adhesive, flatness, interferometry, metrology, optical thickness measurement, parallelism, silicon, wafer

filed under: Dimensional Measurement, Lumetrics, Non contact thickness measurement, optical thickness measurement, OptiGauge, OptiGauge II, Thickness Measurement

Lumetrics exhibiting at Photonics West 2017

Posted January 10, 2017 by Kristin

Photonics West 2017 is just around the corner and Lumetrics will be exhibiting in booth #616 from January 31st through February 2nd at the Moscone Center in San Francisco, CA. Lumetrics will be showcasing the OptiGauge® II as well as a live demonstration with the CLAS-IR adaptive optics, operating at telecom wavelengths.

filed under: Lumetrics, Non contact thickness measurement, Photonics