A diverse range of materials and sizes to meet your needs.

Commercial Quality Square Windows

Non-precision, square windows commonly used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows, etc. All catalog windows can be customized to your specification, whether modification of dimension or adding a thin film coating. Read more about modifying a catalog optic.

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Borofloat 33 square window

Commercial Quality Windows, Square, Borofloat 33
Fused Quartz square optical window, Quartz optical window

Commercial Quality Windows, Square, G1 Commercial Grade Fused Quartz
IR Fused Silica square window

Commercial Quality Windows, Square, I2-IR Low OH Grade Fused Silica
N-BK7 square window, Schott BK7 window

Commercial Quality Windows, Square, N-BK7 Optical Glass
UV Fused Silica round window, S1-UV optical window

Commercial Quality Windows, Square, S1-UV Grade Fused Silica

Quality Optics from a Trusted Supplier

American Owned & Operated

Committed to supporting American industry and ensuring the highest-quality production standards.

Military & Defense Supplier

Esco Optics proudly manufactures precision optics for all branches of the armed forces land, sea, air and space.

ITAR Registered & Compliant

Esco manufactures compliant ITAR optics for all of its customers with the strictest confidentiality.

Making Light Work

Dedicated to fostering connections, collaboration, and innovation across the optics manufacturing industry.