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


Looking For a Custom Optical Solution? Enquire

Rod & Cone Mirrors

Knight Optical supply custom cone mirrors and custom 45° rod mirrors for use from UV (200 to 400nm) to the IR (0.7 to 1.1µm) wavebands. The cone and 45° rod mirrors that are custom made, include the following range:

Custom cone rod mirrors: are manufactured from a suitable substrate dependent on application, usually BK7 or equivalent  or quartz. One end is ground and polished into a cone, much like a rocket nosecone or pencil tip and the other end ground flat. This tip is coated with a reflective coating, such as aluminium or gold dependent on wavelength you are working at. Custom cone mirrors are used, for example, to produce 360° illumination when light is directed toward the cone and is reflected into a circular plane with the rod lens at its centre. Another use is to allow for 360° surveillance of an area by directing the observable scene onto a suitable imager.

Custom 45° rod mirrors: Custom 45° rod mirrors are made by slicing an end off the rod at an angle of 45°, this produces an elliptical mirror that appears circular at 90°, and along the axis, for steering a beam onto a different optical path. The small units can be used, for example, to provide a beam a steering unit for a borescope or fibrescope.

Custom 45° and custom cone mirrors can be manufactured to any reasonable diameter and size and vacuum coated with a range of coatings dependent on application.

Some typical coatings for your custom cone and 45° rod mirrors include:

  • Enhanced aluminium coating, 94% reflectivity for use in visible applications.
  • 99.9% dielectric coating for laser use in visible applications.
  • UV aluminium coating for use in UV applications down to 180nm.
  • 98.5% NIR dielectric coating for laser use in the near infra-red region.
  • Ion plated protected silver coating for use in NIR to 2000nm.
  • Protected gold coating for use from 750nm to far infra-red applications.

Knight Optical supply high quality custom cone and 45° rod mirrors made to your exact specification. Every component is individually tested by our highly skilled technicians in our state of art metrology lab to ensure all components meet our high quality standards.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality custom cone and 45° rod mirrors and service can improve your instrumentation and supply chain experience.

Our 2022/2023 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