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λ/4 First Surface Mirror

λ/4 Glass First Surface Mirror

[ecm name=”quarter-wave”]

*The lead time is 1 day with worldwide shipping available.


The Quarter Wave Glass First Surface Mirror with λ/4 flatness has an enhanced aluminum coating and protective dielectric overcoat that is 1 to 2 atoms thick. This mirror is not double-sided: the non-mirror side is frosted.

Comes in 1/5″ thickness – measured as 5.08mm with digital caliper.

Order a Sample
  • 96% Reflective
  • 0% Transparent
  • Flatness is 1/4 wave per inch
  • Made in USA, ships worldwide
  • Same day shipping
  • Quantity discounts available

We know that companies, government agencies and research labs are on a tight schedule. Order before 3:00PM EST and get next-day delivery when checking out with FedEx Overnight.

  • Robotics
  • Laboratory experimentation
  • Barcode scanners
  • Scientific equipment
  • Optics, astronomy, physics, lasers
  • Maximum 5 chips allowed per edge
  • Maximum chip length: 5mm
  • Edge fractures are not allowed

Coating: Single-side coating: Aluminum with an interference coating for reflectivity enhancement, deposited by magnetron sputtering under a high vacuum.

More Information About Our λ/4 Glass First Surface Mirrors

Custom Size Glass Cutting Information
  • The maximum sizes are 16.5″ x 31.75″ and 12″ x 34″
  • The mirrors are wet sanded so the edges are not sharp
  • Our cutting tolerance is +/- 1/16″
  • We can cut circles and trapezoids and other custom shapes
  • The glass first surface mirror cuts just like standard float glass
How We Ship Fragile Glass Worldwide
  • All quarter wave first surface mirrors can be shipped via FedEx
  • Worldwide shipping is available through the online cart
  • The mirrors are shipped fully insured
  • Less than 2% of our shipments arrive broken
  • Shipped with premium packaging materials
Glass First Surface Mirror Detailed Information
  • The surface quality is actually measured as 1 wave per 6″ diameter circle
  • The manufacturing process creates superior flatness by removing distortions such as draw lines
  • We do sell small samples for evaluation purposes.
  • To prevent scratching, you should use 50% Isopropyl Alcohol and Kimwipes. Do not use microfiber wipes or paper towels, as they may cause scratches.
  • Our size tolerance is +/- 1/16″. Please contact us for a custom quote if you need a higher level of accuracy.
  • To laminate the mirror for protection, order our Precote 33 spray.

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