Knight Optical (UK) Ltd Datasheets for Optical Lenses

Optical lenses are transparent components made from optical-quality materials and curved to converge or diverge transmitted rays from an object. These rays then form a real or virtual image of the object.  This area includes micro lenses.
Optical Lenses: Learn more

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Product Name Notes
Please note; Due to the size of some of these lenses, we may need charge an additional fee for shipping. If you would like further details, please send your request...
A single lens used to form an image will always show some chromatic aberration, that is variation of focal length with wavelength. Achromatic doublet lenses correct for this as they...
As the name suggests cylindrical lenses have surfaces which are sections of a cylinder rather than the normal sphere normally used. Cylindrical lenses (cylinder lenses) are often used to change...
Ball lenses are, as the name suggests, completely spherical lenses most commonly used to couple light in and out of fibres. Knight Optical supplies a range of stock ball lenses...
Biconvex lenses are a good quality simple form of lens; typically both faces are convex and spherical. UV grade fused silica biconvex lenses are widely used for moderate quality imaging...
Biconvex lenses are one of the most simple lenses, but good quality, glass lenses with both faces convex and spherical. Biconvex lenses are widely used for moderate quality imaging and...
Calcium Fluoride (CaF₂) is commonly used for optics looking at the IR and UV spectrums and has a very low change in refractive index with wavelength. It shares similar optical...
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 the...
Condenser lenses are used for concentrating light into a beam. Condenser lenses are typically used in enlargers, projectors and illumination lighting systems. This range of large condenser lenses have been...
Fresnel lenses consist of a flat surface with interspaced, concentric steps whereby each step corresponds to the surface of a conventional lens. Each step thereby acts as a refractive surface,...
Fused silica cylindrical lenses are widely used in the ultraviolet applications and these cylindrical lenses find many applications for beam handling in this spectral region. Like all cylindrical lenses they...
Lenticular lenses are comprised of regular lines of cylindrical lenses on a flat surface that efficiently divide, focus and diffuse light rays. This type of lens sheet is used for...
Most of the single lens forms, planoconvex, planoconcave, meniscus and aspheric, are available in plastic. Plastic lenses are generally cheaper and lighter than glass equivalents but of lower quality. Plastic...
Planoconvex lenses have one plane and one convex surface and have a positive focal length. Planoconvex lenses are typically used for focusing or collecting light in optical systems. Plano-convex lenses...
Plastic Aspheric Lenses are relatively cheap as they are mass produced, moulded or pressed, plastic. The surface quality of plastic aspheric lenses is worse than most conventionally polished lenses. However...
Rod Lenses are a special variant of cylindrical lenses. They are complete rods where the light passes through the sides of the rod and focuses a line. Rod lenses have...
Sapphire crystal (Al2O3) is an excellent substrate for a range of rugged applications. It has high transmission from 150nm up to around 5µm therefore ideal for UV, Visible and IR...
These fire-polished aspheric lenses are glass lenses manufactured by a simple moulding process and polished by heating just enough to melt the surface and allow surface tension to smooth out...
These simple fused silica planoconvex lenses have a convex spherical face and a plano face resulting in a positive focal length. Synthetic fused silica fused is an excellent choice of...
Traditionally lens surfaces have been sections of a sphere. For many applications this leaves spherical aberration as the dominant defect of any image so created. Aspheric lenses are used to...
Zinc Selenide is used in the form of optical windows in FLIR (Forward Looking Infrared) systems, as meniscus, spherical or cylindrical lenses and as resonator windows in CO2 lasers.

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