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Knight Optical(UK) Ltd - sales@knightoptical.co.uk - +44 (0)1622 859444

Domes & windows for optics in submersible ROVs

Submersible ROVs pressure windows & domesDomes and Pressure Windows

Knight Optical is a leading, established and reliable supplier to manufacturers of underwater ROVs for surface and deep water exploration. With our excellent record delivering quality, metrology tested optical domes & windows; we like to think we are the best solution for custom ROV dome and window solutions. Our products are used by satisfied customers in the ROV industry worldwide. Contact our experts and find out why!

We can manufacture and supply custom optical components to your unique bespoke drawings, helping make your design a reality. We have the capability to design your optical component/system using ZEMAX software to bring your finished product to the market place free of complications.

Our aim is to understand our customer needs working with ISO10110, BS4301-1991, and MIL-PRF-13830B, with an understanding of ITAR, Knight Optical deliver optical components and sub-assemblies at the correct quality on time and within budget. Our core products include protective dome windows and viewports for ROVs, hard wearing cover windows and optical filters for underwater imaging.


Domes for underwater enviromentsSaphhire dome windows for submersible cameras

Dome windows are hemispheres. The two optical surfaces are an equal thickness apart, creating a naturally strong shape that gets tougher under pressure. This makes dome windows ideal for underwater environments and in applications such as camera dome ports and submersible windows.

Typically the material used will depend on the working wavelength of the application with Schott N-BK7 or equivalent, Fused Silica (Spectrosil), Sapphire and PMMA acrylic most commonly used. N-BK7 or equivalent, offers a tough, cost effective solution for visible range applications while Fused Silica is ideal for wavelengths below 400nm. Sapphire is used for its rugged properties and is suitable for harsh environments where a softer material would risk damage. PMMA is lightweight and cheap to produce in bulk. Modern plastics are increasingly tough and in many cases offer near identical optical properties to glass while saving considerably in weight. For infrared applications we can provide sapphire domes.

Knight Optical offer several stock domes between 25mm to 100mm diameter, made from quality glass at affordable prices. These sizes have been specially chosen to suit our customers applications and are amoung our most popular products. 

We also offer custom domes as part of our extensive optical design and manufacturing service. Custom parts can be manufactured from your own drawings or designed in house by our experts. The table below shows just some of our custom dome capabilities.

Find out more about our Stock Domes here

Diameter (mm) 5mm to 300mm+
Thickness (mm) Dependant on diameter. Please ask for more information
Dimensional tolerances (mm) +/-0.05
Max. strength variation* (diopters) +/-0.2
Surface figure (fringes) < 10(5)
Concentricity (mm) < 0.05
Scratch/dig <20:10
Polish < P3
Material N-BK7 or equivalent, Fused Silica, PMMA, Sapphire and more
Mounting options Unmounted or custom mounted
Coating options AR coated for select wavelengths, ITO coated, Hydrophobic coated
Pressure tolerance Dependent on size and material. Contact us for more information.

* Strength variation relative to strength at peak of dome


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Whatever your project we will be happy to be involved; call our technical advisors for advice or submit your drawings here for a full quote within 48 hours.

Get in touch

Our Multi-Lingual Sales Team are here to help with your requirments:

UK +44 (0)1622 859444
UK +44 (0)1622 850614
UK +44 (0)1622 851078
+1 401 583 7846

International Shipping

We are able to ship to most countries at good rates, please click here for more info.

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