Over 30 Years in the Industry
Beginning business in 1982

Guernsey Coating Laboratories, Inc., is an optical coating company specializing in quality thin-films covering the wavelength range from ultraviolet to the near infrared.

With a complete line of standard coatings as well as custom coating designs, GCL reaches such areas as:

  • Medical
  • Aerospace
  • Defense
  • Optical Instrumentation
  • Inspection Equipment
  • Telecommunications
  • Imaging, Displays
  • Lighting & Scanning
  • Universities
  • Laser and Semiconductor fields.

GCL meets and many times exceeds Mil-Spec requirements committing to both a higher standard of performance while working with our customers to bring about a successful product.

Deposition Techniques and Coatings

From research and development to high volume runs, GCL's expertise covers custom design, custom tooling, evaluation and testing to final production.

Using the following techniques:

  • Resistance Source Thermal Deposition
  • Electron Beam
  • Ion Assisted Electron Beam
  • Ion Beam Sputtering

(Note: Ion Beam Sputtering provides the advantage of the highest packing densities, giving the thin-film coating exceptional adhesion, abrasion, resistance and ruggedness).

Applications include coatings such as:

  • Broadband Anti-reflection
  • V-Coats
  • Super V-Coats
  • MgF2
  • Dielectric High Reflectors
  • Protected Aluminum
  • Enhanced Aluminum
  • Protected Silver
  • Protected Gold
  • Beam Splitters
  • Neutral Density
  • Dichroic


















News and Events
August 17 - 21 2014 Optics + Photonics
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February 10 - 12 2015 Photonics West
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