Commercial Quality Circular Windows

Non-precision, circular 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.

Quality Optics from a Trusted Supplier

American Owned & Operated

Esco Optics is a leading manufacturer of custom and catalog optics, precision optical components, and ITAR optics in the United States.

Military & Defense Supplier

As the leader for military and defense optics in the United States, Esco Optics adheres to the International Traffic in Arms Regulations.

ITAR Registered & Compliant

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