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

BREXIT UPDATE: Knight Optical will continue to provide quality assured service for all your optical requirements both custom & stock. We will handle all requirements caused by the new regulations.


Looking For a Custom Optical Solution? Enquire

Concave Lenses

Concave lenses, are a simple lens with one spherical face and one flat Plano face. Because the spherical face is concave the lens has a negative focal length, allowing them to increase the divergence of convergent light. Custom concave lenses can be used to balance out the spherical aberrations caused by other lenses. This makes concave lenses very useful for controlling laser beams.

Being a simple lens, custom concave lenses have a broad range of applications including, but not limited to, focussing and control of laser beams, moderate quality imaging and other optical instruments. In a multi-element optical system they reduce the power of the system. Used on their own they form a diverging cone or virtual image. A typical use for custom concave lenses would be in a beam expander.

Knight Optical supply a range of custom concave lenses from commercial grade though to high quality N-BK7 or equivalent  and UV Fused Silica types and concave lenses made using high-index  SF11 or equivalent  also including a range of high-index laser type. We also supply a range of custom concave lens sets for design and laboratory use. All stock lenses can be edged down to smaller custom sizes at short notice.

Every component is individually tested by our highly skilled technicians in our state of the 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 concave lenses 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