The leader in precision optical mirror coatings for telescopes and astronomy. Producing Front Surface Mirror coatings, Anti-Reflection, Beam splitter, hot & cold mirrors, dichroic filters that meet and exceed the standards of the optical thin film industry.

Ion Assisted Deposition




Spectrum Coatings utilizes their technology to accommodate a wide variety of uses for the unique properties of optical coatings, specializing in front surface mirror coatings for telescopes and astronomy. Our State of the Art, Ion Assisted Deposition process allows us to produce hard, durable oxide optical thin films without high-temperature substrate heating. These ultra-hard coatings are perfectly suited for the harsh environment that is indicative of telescope mirrors. We offer many types of coatings including protected aluminum and enhanced aluminum.

Coating Designs


Optical Thin Film Coatings - designed using FilmStar & Mcleod Concise thin film design software.

Ion Assisted Deposition


Our Telescope Mirror Coating process utilizes the latest methods in Optical Coating technology, perfectly suited for the often harsh environment of the Telescope Mirror industry. State of the art Ion Assisted Deposition - IAD - enhances the quality of the deposited material in the ways listed in the below link.

Instructional Videos


Take time and watch our informative, instructional videos.


Please take the time to fill out this form with any questions you may have to receive a timely reply.

Telescope Mirrors
Thin Film Design

Spectrum Coatings

1165 Ring St.

Deltona, FL 32725

email: paul@spectrum-coatings.com

Tel: (386) 561-9779

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Sizes from super small up to 24".


All jobs are treated equally, from the tiniest set, to the 24", $60,000 Zerdur set.




The standard for optical thin film design for many decades

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Mirror Handling and NO REFUND Policy

© 2016 Spectrum Coatings

Spectrum Coatings Telescope Mirror

20" ZeroDur Primary Mirror