Custom Rectangular Windows

Rectangular optical windows are flat, parallel-faced optical elements used to isolate different physical environments while allowing light to pass through with minimal distortion. Unlike lenses or prisms, windows have no optical power - their entrance and exit faces are parallel, preserving the direction and properties of transmitted light.

These windows are commonly used in vacuum chambers, pressure vessels, optical isolators, and environmental protection applications. The parallel faces maintain beam collimation and prevent optical aberrations, making them ideal for precise optical systems requiring physical separation.

Our configurator below provides instant online quoting for custom rectangular windows in N-BK7 (H-K9L) and UV Fused Silica (JGS1) materials. You can specify length, width, thickness, and optional corner radius for improved mechanical strength. AR coating options (VIS, NIR) are available and applied to both entrance and exit faces to minimize reflection losses.

If you need materials, coatings, edge treatments, or specifications not available in the configurator, please contact us at [email protected] for a custom quote.

Note: It costs about as much to make one custom window as it does to make ten, hence the minimum order quantity is 10 pieces. Large price drops occur as volume increases to 100 units.