Filter Glass Spectral Calculator Provides Data for Better Product Design

 Our new filter glass spectral calculator allows you to adjust glass thickness based on your design needs and then provides you with the corresponding transmittance data. This helps you to select a glass that will meet both your transmission and design needs.

In precision applications like colorimetry, instrument and lighting calibration, fluorescent diagnostic imaging, or sensing you must be able to isolate specific regions of the radiant spectrum. Not all filter glasses perform the same and they all have slightly different transmission spectrum, making it difficult to compare them. In fact, spectral data typically has not been available for glass at thicknesses other than nominal.

The lack of readily-accessible data makes new product design difficult and can lead to time-consuming redesigns and inferior products. With more information we’re able to make better decisions – and better products. Material data provides you with insight into your product’s performance and the means to improve it.

On the topic of data, well, we have lots of it. We have spectral data for more than 200 different glass compositions at any thickness. This information is invaluable during new product development. We often collaborate with our customers – adjusting compositions and designs – so that they get the best glass product possible.

We’ve developed calculators and other tools to help us quickly provide customers with spectral data. Now, we are sharing one of these tools with you; our new filter glass spectral calculator gives you immediate access to our glass database and helps you find the best glass for your application. With the spectral calculator, you’ll be able to:

  • Compare more than 200 filter glasses, including common industry equivalents
  • Plot multiple glasses at once for easy comparison
  • Isolate target wavelengths to calculate transmittance data
  • Adjust glass thickness to meet design specs
  • Download custom spectral data in print-friendly report

Ease of Substitution

Not only does the calculator help when designing new products, it also allows you to easily compare popular industry filter glasses to our compositions. It can be difficult to switch manufacturers when specific filter glasses are spec’d in; you need to ensure that the glass will perform the same. The spectral calculator helps you find matches for your current filters or identify new glass compositions that can improve performance.

Filter Glass Spectral Calculator for glass substitution
The calculator allows you to compare over 200 filter glasses, including common industry equivalents as shown in the above comparison between K515 and OG515.

Beyond the Square – Molded Filter Glass

When you think of filter glass, you most likely think of 6” x 6” squares. Filter glass has been manufactured in this format for decades. Engineers designing new products often assume that their only option is to start with that format and to then design around it. Unfortunately this can lead to additional processing and machining to make the glass meet their design needs. Complex contour shapes are difficult to achieve through machining and often are not considered design options for filter glass components. However, our capability to mold filter glass into complex forms gives you the flexibility to design truly innovative products that go beyond the standard flat square.

Learn How to Use the Calculator during the Design Process

We’ll be demonstrating the filter glass calculator at SPIE Photonics West on Wednesday, February 11, at 10:30 AM. We’ll share several case studies to illustrate how the calculator can be used during new product development. Stay tuned, we’ll share more information on our presentation in an upcoming blog post.

In the mean time, test the calculator and let us know what you think.

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About the Author
Adam Willsey

Adam Willsey Adam joined Kopp Glass in 2009 after graduating from the NYS College of Ceramics at Alfred University with a BS in Biomedical Materials Engineering. In 2013, he completed his MS in Materials Science from Alfred University. As the Enabling Technologies Project Manager, Adam works closely with our engineers and production team to develop new glass compositions that meet our customer's color and transmittance requirements, while ensuring efficiency.