The Lumenarium Blog

Women in Optics: Mary Banning Friedlander developed multi-layer low reflecting coatings

Mary Banning Friedlander, multi layer films

Mary Banning operates the knife switches powering one of the evaporators at the Institute of Optics, circa 1944. [Mary Banning Friedlander/Opt. News 13(6), 10 (1987).]

Rochester, New York is not just the “birthplace” of the thriving optics industry as we know it today, it’s also where the inclusion of women in STEM fields got its start. In 1941, Mary Banning Friedlander (FKA Mary Margaret Banning), a Physics Ph. D. from Johns-Hopkins University began her short but wildly successful career in optics and went on to develop multi-layer low reflecting coatings.

Once the United States officially joined Allied forces in the war, tensions ran high as the country struggled to develop new military technology to help defeat their enemies on the battlefield. One important optics contribution (among many) that came from Rochester were the multi-layer low reflecting coatings that Friedlander developed during her tenure at the Institute of Optics. These multi-layer films were used in military rangefinders and several other defense applications. Friedlander’s work in optics also contributed to solving another very critical issue for the U.S. Military: how to land in hostile territory in complete darkness without being detected by the enemy.

For more information on Mary Banning Friedlander’s career and achievements in optics, head over to read an in-depth article by Sarah Michaud and Stewart Wills at The Optical Society of America website.

Online Tubing Thickness Measurement

Online tubing measurement systemLumetrics is the leader in online tubing thickness measurement systems for the ophthalmic, glass, and medical device market.  Our engineering team has developed a new fixture that eliminates the problems of line sensitivity that give all online systems trouble.  The new fixturing provides for easy loading and accommodates line changeovers to different size tubing. Water is the enemy of all hydrophilic tubing production, and the OptiGauge provides the crucial inner diameter, outter diameter, and wall thickness readings that customers require.

The total online tubing solution uses the OptiGauge II interferometer in conjunction with the newly designed tubing fixture.  The OptiGauge II is designed in a way that all software can run on the customer’s existing processor.  This makes integration into their current production line systems and processes seamless.  The fixturing has easy-to-use lever action controls that position the probes and stabilizing rollers properly for any size tubing.

Lumetrics has been selling the OptiGauge II for over a year, and the market reception has been tremendous.  The new online tubing fixture is being fine-tuned based on initial trials, and will be available in April for full deployments.  Call us at 585.214.2455 or email to discuss how our new tubing solution can help solve your existing production problems.

Upcoming Event: Photonics West 2016

Lumetrics will be exhibiting at Photonics West this February in Booth #3018!  Please stop by and say hello- we have lots of new measurement solutions for your manufacturing process.

Please email or to set up an appointment or for more information on sample measurements!

If you haven’t registered- make sure you get registered for free here:

photonics west 2016, Thickness Measurement, non-contact thickness measurement, optical thickness measurement

Measuring Windshields with Heads up Displays

glass thickness measurements

Lumetrics handheld probe holder with 50mm Probe

Since the formation of the National Highway Traffic Safety Administration in 1970, the NHTSA has implemented regulations impacting all areas of vehicle safety including automotive glass.  The OptiGauge helps with the process by obtaining highly accurate glass thickness measurements to ensure glass is to manufacturer’s specifications.

For years windshields have been comprised of two pieces of glass approximately 2mm thick with an approximately 1mm layer of vinyl sandwiched in-between.  Today, many windshields include another thin, sound absorbing vinyl layer that helps reduce road noise.

Now technology and driver safety intersect on the windshield.  Heads Up Display (HUD) windshields provide drivers with access to important dashboard information such as speed and navigation while providing the safety benefit of maintaining eyes on the road and reducing driver distractions.

In order to maximize optical quality, HUD windshield technology requires further advancements in windshield manufacturing.  The most notable requirement is the ability to insert a wedge shaped polymer (Polyvinyl butyral – PVB) between the glass sheets. This wedge shape eliminates the “ghost” reflections that normal windshields produce when using HUD.  The problem then becomes how to measure the wedge or thickness of the laminate from top to bottom.  The generally accepted practice of using a micrometer to measure the laminate thickness at the top and bottom of the windshield now becomes obsolete as manufacturers need to measure thickness across the whole windshield from top to bottom in a non-destructive manner.  

Lumetrics invented the OptiGauge® which provides highly accurate and reliable glass thickness measurements with our custom solutions to meet the many needs of windshield glass manufacturers.  First we have provided multiple systems to the largest PVB manufacturers in the world to measure the wedge angle in the PVB as it is being produced.  Additionally, we have sold more systems to the auto glass manufacturers, who make the windshields.   The OptiGauge assists these cusglass thickness measurementstomers with product development, optical quality, and troubleshooting lamination problems.

The Lumetrics OptiGauge is based on the theory of time domain interferometry to produce highly accurate (.01micron accuracy) measurements.  For more information or a demonstration please contact Lumetrics –, 585-214-2455.

Measurement of Bioresorbable Stents

bioresorbable stentsMetal stents have been available since 1988.  Through the 1990’s, stents went through numerous iterations, incorporating different metals and coatings.  As the medical products industry moved through the 2000’s, the use of bioresorbable stents became the newest innovation.  And, it is a tremendous innovation.

Through the use of bioresorbable stents, physicians are able to reduce or eliminate anti-platelet drugs, maintain the flexibility of the blood vessel, and lessen risks and complications of future surgical events.  Absorption of the stent into the body within a one to two year period provides tremendous advantages to the patient and physician.

Lumetrics® has been working with medical device customers since 2004 on non-contact tools to non-destructively test and measure bioresorbable stents in all stages of development and manufacture to ensure proper functionality.  Lumetrics uses a high power LED to make measurements within our custom designed, precision optical interferometer.  The OptiGauge® is the ideal tool to measure all critical parameters in bioresorbable scaffolds.

OptiGauge measurements are:

  • Objective – NIST traceable
  • Accurate – 0.01 microns
  • Rapid – up to 200 samples per second
  • Non-contact and non-destructive
  • Cost saving and risk reducing

The OptiGauge thickness measurement system provides measurements of Inside Diameter, Outside Diameter, wall thickness, ovality, and concentricity of any tube material.  All measurements can be provided online, at-line, or off-line.  Lumetrics designs custom fixturing for any application with its team of seasoned hardware and software engineers.  Contact Lumetrics to find out more about our non-destructive bioresorbable scaffold measurement solutions.

New OptiGauge product introduced: OptiGauge II

OptiGauge II non contact thickness measurement systemThe OptiGauge II non contact thickness measurement system is ideal for companies looking to move away from traditional contact measurement systems. It is non-destructive and objective, leaving no margin for operator error. It offers customers extraordinary flexibility in a measurement system. This user-friendly system delivers reliability and sub-micron accuracy so vital to today’s most advanced industries. OptiGauge II can be particularly useful in in Quality, R&D labs, and production floors because it can improve yields, reduce costs, increase quality, and meet compliance requirements.  View the press release on our new product announcement!

A detailed spec sheet and product data sheet can be found here, and if you have further questions, you can email us or call us at +1 585-214-2455


Integrated Photonics Institute will be Headquartered in Rochester, NY

On Wednesday, July 22 2015, Representative Louise Slaughter’s office announced that Rochester, NY won a very arduous battle to be named the headquarter for the new Integrated Photonics Institute In Manufacturing Innovation (IP-IMI).  New York Photonics published a comprehensive article (with links to other relevant articles about the project):

In a hotly contested competition that had a team led by New York State vying with a team led by Florida and another led by Southern California, the DoD has chosen the New York team as the winner for the Integrated Photonics Institute In Manufacturing Innovation:  AIM Photonics. Congresswoman Louise Slaughter and Senator Chuck Schumer have announced National Manufacturing Institute in Photonics to be located in New York and headquartered in Rochester.

The complete article (and other links) can be found here.

Rochester celebrates the International Year of Light

New York Photonics blog posted a great article on the events in Rochester surrounding the International Year of Light celebration- here’s a brief overview and link to the full article written by Tom Battley.

In 2014 NYPhotonics began working on (or instigating) a number of projects for the International Year of Light in Rochester. A broad view looks like this:

  • Rochester Museum & Science Center IYOL2015 Advisory Committee
    OPI Company Tours in May 2015
  • Illuminations, a permanent exhibition of interactive OPI science demonstrations previewing now in the Patricia Hale Gallery at RMSC
  • Cubes: A Visual Exploration of Possibility at the Rochester Contemporary
  • A Street Light Festival (July 17 & 18)
  • “..of Light” a commissioned piece of music for Jazz Ensemble by Dave Rivello, Assistant Professor of Jazz and Contemporary Media, Eastman School of Music. This piece will debut during two performances in Kilbourn Hall during the First Niagara Fringe Festival on Friday, September 18th.

For the full article, click here!

Lumetrics, a spin-off supplying high precision gauging

When the products you make have to be of a precise thickness, that’s where a company like Lumetrics comes in.

Lumetrics develops and manufactures high-precision thickness measurement and gauging systems for a variety of industrial applications. The Henrietta-based firm’s clients include companies that make items like contact lenses, medical devices, and glass products. Read original article here.

Lumetrics Obtains Patent for Wavefront Sensor Contact Lens Measurement System

Lumetrics was awarded a patent for an apparatus that measures the optical performance characteristics and dimensions of an optical element using a Shack-Hartmann wavefront sensor and a low coherence interferometer. This is a major improvement on current manufacturing inspection methods, especially for the contact lens and intraocular lens industries. Read More