Rectangular Sapphire Windows

Manufactured in the USAManufactured in the USA


Rectangular sapphire windows and square sapphire windows are manufactured regularly at Guild Optics. Rectangular sapphire windows are excellent at protecting delicate optics due to their superior strength and transmission. Rectangular sapphire windows can also be used as viewports in high pressure or vacuum situations. Square sapphire pressure windows can be made much thinner than other optical glasses due to sapphire’s high modulus of rupture.


Length/Width: From 1 mm (.039”) to 305 mm (12”) in any optical axis
Thickness: Varies by size but can be sub millimeter and up
Flatness: Varies by thickness but can be 1/10 wave or better if needed
Parallelism: Varies by size but can be as tight as 1 arc second
Surface Quality: Down to 10/5 Scratch/Dig
Quantities: From singles to full large scale production runs

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Durable, scratch resistant, stronger than glass

learn the benefits of sapphire optics