Sapphire Optical Windows – More durable than glass

Now offering sapphire windows in volume.

Sapphire is an excellent material of choice when durability and broadband transmission from the UV to Mid IR are required. The material is commonly used in critical environments where abrasion resistance and extreme pressures and temperatures are encountered such as defense and aerospace applications, exposure to chemicals as the uncoated sapphire is chemically inert as well medical applications where safety is of the utmost concern. Sapphire’s excellent thermal conductivity and low thermal expansion allow it to dissipate heat quickly while maintaining form in high temperature environments.

Sydor Optics manufactures custom sapphire windows using a specialized, high speed, double-sided grinding and polishing process. We can process multiple parts in a group quickly making this cost effective when compared to processing one surface at a time. Currently we are capable of producing over 2,000 sapphire windows per month.

We offer both CNC machining and double-sided grinding/polishing services to produce custom parts that are to spec, to budget and on time.

Manufacturing Capabilities

Working with C-plane sapphire

Custom shapes with mechanical features available such as holes, channels, counterbores, flanges, etc

Any shape up to 200mm in diameter/diagonal, larger window designs will need to be reviewed by our engineers

Thickness starting at 1mm with tolerances down to +/-0.010 mm

Cosmetics to 20-10 per MIL-PRF-13830B

Transmitted wavefront better than ¼ wave

Parallelism better than 5 arc seconds

Interferometry available for both 633 nm and 3.39 um wavelengths

Available with antireflective coatings

Windows can also be mounted into frames or subassemblies

Currently producing over 2,000 sapphire windows per month

Applications for Sapphire Windows

(click to expand)

Commercial & Military Aerospace

Gun sights

Protection of ISR & EO systems (sensitive sensors, imaging and targeting systems)


Barcode readers

Deep sea vehicles

Drilling vision systems

IR analytical instrumentation

Laser windows

Pressurized vessels and furnaces

Viewports near corrosive chemicals and gases


Endoscopes and medical instrumentation


Wafer processing systems

Sapphire Window Shapes

Below are some of the standard optical window shapes that Sydor Optics customers frequently order. Of course, Sydor Optics can manufacture custom optical windows — with various shapes and sizes — using CNC Glass Machining or Laser Machining capabilities to meet your specific needs.

Circular Windows

Square Windows

Rectangular Windows

Elliptical Windows