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Knight Optical(UK) Ltd - [email protected] - +44 (0)1622 859444


What are you looking for in Stock?

Light pipe homogenising rods: Our stock ranges of homogenising light pipe rods are available as hexagonal and tapered types.  Materials that we offer hexagonal and tapered light pipes in are BK7 or equivalent   for visible applications and UV grade fused silica that works efficiently down to 175nm ideal for UV LED illumination.

Fresnel prisms: Fresnel prisms are manufactured using the stepped surface approach of a fresnel lens. They have saw tooth like structure and will deviate a beam of light by the specified angle. The beamsplitters have a symmetrical profile and so create a pair of beams symmetrically about the centreline. In this way they act as beam splitters.

Deviating penta prisms:  Our range of stock penta prisms have aluminised reflecting surfaces and very tight deviation tolerance.  Penta prisms are excellent in metrological applications, e.g. for setting up axes accurately for right angles.

Dispersing prisms: A dispersive prism is a form of optical component that refracts and deviates the wavelengths of the incoming beam.  This has the outcome that the spectrum from the incoming beam can be analysed and recorded.

Equilateral prisms:  Equilateral dispersion prisms are commonly used for wavelength separations i.e. creating the rainbow effect.  Depending on the material used, equilateral dispersion prisms can be used over a wide range of wavelengths.  We offer UV fused silica dispersion prisms for use in the ultra-violet wavelength from 170nm and other high index materials which are used for visible applications. 

Pellin-Broca prisms: Pellin-Broca prisms are constant deviation prisms and have a very interesting property that the light at the required wavelength is deviated by 90° with the wavelength being selected by the angle of rotation of the prism.  A typical output line from a multi-line laser can be extracted by the prisms capability to separate beams after undergoing a non-linear frequency conversion.  A typical use is in optical atomic spectroscopy.

Littrow Prisms: Littrow prisms are constant deviation dispersive prisms that are like the abbe prism.   A typical output line from a multi-line laser can be extracted by the prisms capability to separate beams after undergoing a non-linear frequency conversion.  Like the Pellin-Broca prism these are typically used in optical atomic spectroscopy. The Littrow prism is, usually, a 30°-60°-90° prism that can be used as a dispersive, deviating, or retro-reflecting Brewster prism. 

Inverting prisms: Knight Optical supply a range of stock inverting prisms that cover the visual and NIR range. 

Amici roof prisms:  The amici prism, or roof prism, is used to revert and invert the incoming image, and also bends the viewing axis through 90°. 

Porro prisms: The porro prism is shaped as a right-angled triangle and works by the light beam entering the long face (hypotenuse) at 90° and being reflected by TIR from the two sloped faces and exits the longest face at 90°.  As the light beam enters, and leaves, the prism at 90° the beam is not wavelength dispersed, that is, a non-dispersive prism. 

Dove prisms:  The dove prism is made from a truncated right-angled prism.  When a beam impinges upon one sloped face, such that the beam is parallel to the longest face.  At this sloped face the beam is refracted such that it strikes the longest face at an angle that the beam is TIR reflected.  Following this reflection the beam is refracted out of the prism by the second sloped face.  The beam is parallel and coincident with the input beam but the image is inverted. 

Reflecting rhomboid prisms: Rhomboid prisms displace a light beam laterally and in effect represent a pair of single mirrors. Generally the reflecting faces of rhomboid prisms are uncoated and rely on total internal reflection.

Wedge prisms: Wedge prisms are generally quite thin and the input and output faces are nearly parallel. A beam of light passing through a wedge prism is deviated by an angle determined, to first order, by the wedge angle and the refractive index.

Corner cube prisms: Corner cube prisms reflect the light back, nominally at exactly the same angle at which they entered. These high-precision retro-reflectors offer excellent parallelism between the incoming and exiting beams. Mounted corner cube options are also available for seamless integration into your application.

Polygons: Polygons are used for checking angles in autocollimators but also have a usage in laser scanning systems.  The highly polished accurate faces can be coated with any mirror coating to meet your laser application.  Polygons are available in a range of materials but normally manufactured using quartz or UV grade fused silica.

Anamorphic pairs: Anamorphic prism pairs are used to change a laser diode beam which is elliptical in shape to a circular shaped beam in one direction.  If anamorphic prism pairs are orientated about their angle then the beam can be increased or decreased in spot size.  Knight Optical provide a range of anamorphic pair solutions to meet your specific requirements.

Every stock prism is rigorously inspected in our state-of-the-art Metrology lab, using our Trioptics Prism Master which is capable of measuring to tolerances of ±3 arc seconds. Contact our multilingual technical sales team and discover how Knight Optical’s high quality prisms can improve your product and supply chain experience.

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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

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