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Coatings for Today’s Technology
ABOUT US
Since 1927, H. L. Clausing Inc. has been producing mirrors and optical coatings. Our customers include research, universities, military and industrial.
Over these many years, we have coated optics for almost every application imaginable. Read more About Us.
Our coatings and technology have evolved over the decades and we continue to produce state of the art coatings for today’s applications.
PRODUCT DEVELOPMENT
We specialize in product development, short run production and difficult to coat substrates. We take on the unusual jobs that are often required for R&D. Please send us your requirements and let us use our experience to help bring your project to successful completion.
APPLICATIONS
Our mirrors and optical coatings are used in applications such as UV, Visible & Infra Red Optics, Research & Academic, Telescope Mirrors, Conductive Coatings, LIDAR Optics, Military & Defense, Medical Instruments, Industrial Machines & Scanners, Point of Sale Displays, Planetarium Domes, Aircraft Mirrors.
OPTICAL COATINGS FOR RESEARCH, DEFENSE & INDUSTRIAL APPLICATIONS
The Clausing family has been engineering coatings for three generations. We have designed coatings for thousands of applications. As such, we have a tremendous amount of proven coating recipes. These include coatings for observatory telescope mirrors, research applications, medical devices, aerospace, point of sale displays… and much more. Our mirrors and optical coatings are used in a wide spectrum of applications. Please feel free to contact us with the details of your project. We are confident that we can engineer a new and innovative solution.
OPTICAL COATING TESTING
H. L. Clausing Inc has tremendous in-house optical testing capability. This allows us to accurately develop new coatings as well as provide stringent quality control. We also offer optical testing as a stand-alone service to customers who require specialized testing or independent verification.
We have the ability to test spectral ranges for the UV, Visible, Near-IR and IR bandwidths (190 nm to 25 microns).

HLC Custom Coatings
Our available coatings include the following:
- Magna-Brite (Enhanced Aluminum)
- Ion-Brite (Protected Aluminum)
- Diamond-Brite (Enhanced Silver)
- Gold
- Protected Gold
- Platinum
- Rhodium
- Beral (Broadband Alloy)
- Nickel
- Quartz
- Sapphire
- ITO (Indium Tin Oxide)
- UV-280 (Protected UV Coating)
- IR 714-2 ( High Efficiency IR Coating
- and many more other custom coatings according to our customer specifications…..
Contact Us
We are located in USA and serve customers primarily in USA, Canada, Europe, Singapore and Australia. If your company is elsewhere, send us your inquiry and we may still be able to quote your project.
8038 Monticello Ave
Skokie
Illinois, IL 60076
Get in touch with us:
Phone: 847-676-0330
Email: hclaus@clausing.com
Email: office@clausing.com
