Europe, UK, Asia & RoW: [email protected] +44 (0)1622 859444 | USA & Canada: [email protected] +1 401-583-7846

Underwater Optics


optical components for underwater industries

Knight Optical is a leading, established and reliable supplier of precision optics to manufacturers of underwater ROVs (remotely operated underwater vehicles) and underwater cameras for surface and deep water exploration. With our excellent record delivering quality, metrology tested optics we like to think we are the best solution for custom optics for underwater camera equipment. Our products are used by satisfied customers in the ROV industry worldwide.


Optical components Defence, Security & Aerospace industries

Custom Optic Solutions

Knight Optical are global leaders in custom optical solutions. We have a team of Science and Business graduates complimented by a management team with years of experience. We work closely with our customers to achieve their specific goals in the design and manufacture of custom optics and mechanics to their exact requirements.

Custom Optics


Stock Optic Solutions

We also hold a large inventory of stock optical components for use in ultra-violet, visible, near infrared and far-infrared applications that can be customized at short notice to meet your specific requirements.

Stock Optics

stock optical components for university research

Optics for Exploration

Domes and Lenses

Dome windows are used to protect other optical and electronic systems from the external environment. Dome windows are typically hemispheres with two optical surfaces that 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, 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 the glass while saving considerably in weight. For infrared applications, we can provide sapphire domes.

Knight Optical supplies lenses made from a multitude of materials depending on operation wavelength, durability, weight and environment. Lenses can be coated with highly effective antireflective coatings to improve transmission.


Understanding Quality

Our rigorous testing procedures – using advanced metrology equipment and skilled QA inspectors – ensure all our products satisfy even the most specific requirements. This applies to one-off custom parts and large production runs. Every single component we supply is proven to perform. We will also provide you with all the information you require for your documentation. We can reassure you that there is transparency on your ordered items including a metrology report and a certificate of conformance to quality standards. We are able to provide you with as much information as required to ensure that legal obligations are met, allowing your instrument to be approved for use as soon as possible.

Our rigorous testing procedures – using advanced metrology equipment and skilled QA inspectors – ensure all our products satisfy even the most specific requirements. This applies to one-off custom parts and large production runs. Every single component we supply is proven to perform. We will also provide you with all the information you require for your documentation. We can reassure you that there is transparency on your ordered items including a metrology report and a certificate of conformance to quality standards. We are able to provide you with as much information as required to ensure that legal obligations are met, allowing your instrument to be approved for use as soon as possible.

Knight Optical value every one of our customers, and therefore you will be assigned a dedicated account manager, who cares as much about your project as you do. They make the process of getting a quotation to receiving an order, as smooth as possible. We go above and beyond ensuring that your supply chain experience is as stress-free as possible.


Commonly Ordered Optics

Our 2018/2019 Catalogue

Inside Knight Optical’s catalogue you’ll find details of the industries we serve as well as the many other services we can offer. It also showcases hundreds of our most popular products, supported by useful technical information, to help you choose the right part for your application.
Click below to view our digital catalogue now.

view our catalogue