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Knight Optical Ltd

Our products

Domes

    Our stock and custom Domes are available for a range of underwater Remotely Operated Underwater Vehicles (ROVs), Pyranometers and high-pressure Viewport applications, and are commonly specified for high-end imaging applications due to their excellent Transmitted Wavefront Error (TWE) benefits.

    Our high-quality material options include the following:

  • BK7
  • Silicon
  • Sapphire
  • UV Fused Silica
  • Acrylic

    Alongside our vast range of stock (available for immediate order online), we also offer custom-made Domes in options up to 190mm in diameter. For projects requiring larger sizes, we also supply large acrylic-moulded and diamond-turned Domes, which are available in diameters up to 300mm.

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Domes

Apertures

    We supply a wide variety of Apertures, including Pinholes, Slits and Iris Diaphragms in sprung and stainless-steel leaves for beam-shaping applications or saturation of a detector.

    Pinhole varieties are laser drilled from 0.5µm to 1000µm apertures on 302 stainless-steel and are available mounted in a range of standard sizes or as unmounted foils. Supplied in standard or custom-made sizes, our Slit Apertures are laser drilled from 5µm to 200µm in width.

    As well as a range of 86 stock components, we also offer custom-made Apertures tailored to your requirements. Furthermore, we also offer motorised varieties as well as fully closing types, in sizes ranging from 0.7mm to 225mm

    Read more about our stock and custom Aperture range by clicking the link below.

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Apertures

Reticules

  • Eyepiece and stage graticules processed using vacuum metal deposition and etching or photolithographically processes. For use in Gun-Sights, ranging systems and scopes.
  • Standard and custom patterns from scales, cross hairs, protractors and grids.
  • Standard 19mm and 21mm eyepiece for most standard eye-pieces. Stage graticules for sample measurement and calibration in microscopy.
  • Manufactured to almost any pattern and applied to most substrates including plastics, IR/ UV crystals and metals.
  • Mounted reticule assemblies also available.
  • All measured for quality using a Starrett AV300 video imaging test instrument.
  • Over 24 stock reticules available online.

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Reticules

Beamsplitters

  • Huge range of Plate and cube Beamsplitters.
  • Plate Beamsplitters to 300mm square.
  • Polarizing and non-polarizing cubes from 3mm to 50mm.
  • A range of split ratios (T%/R%), 50/50. 60/40, 70/30, 90/10.
  • Visible and NIR wavelengths including Telecom 1050-1700nm on plates, with high quality ¼ wave substrates available.
  • Highly accurate R/T% values.
  • High quality BBAR coatings on the rear of plate Beamsplitters to eliminate secondary reflections.
  • Dielectric and hybrid coatings on cubes especially for difficult NIR wavelengths.
  • All measured using our Cary spectrophotometer equipped with a Universal Measurement Attachment (UMA).
  • Stock pre-coated sheets available for custom sizes at short notice.
  • Over 85 stock beamsplitter options online.

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Beamsplitters

Diffusers

  • Diffusers used for altering divergence on incident light for a range of imaging and optical sensing applications.
  • Ground glass diffusers in UV and NIR materials. Supplied with 40 micron finish or custom grit size down to 3 µm.
  • White-flashed opal in 3.3mm and 6mm thk.
  • Custom diameters, squares and shapes available at short notice.
  • 0.3mm PVC screens and Optolite™ HSR plastic diffusers acrylic with controlled transmission values.
  • Anti-Newton etched glass up to 450mm square.
  • Stock sheets available for custom sizes at short notice.
  • Over 46 stock diffuser options online.

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Diffusers

Polarizers

  • A range of polarizer solutions for UV-Visible-NIR applications.
  • Visible grade sheet linear polarizer’s, HN22, HN32, HN38, HN38S, HN42, HN42HE either as original 3M grades or replacement material. Up to 36x22” and in various laminations and thickness.
  • UV-NIR sheet polarizer’s. HR, HNP’B grades.
  • Circular HNCP37 original 3M polarizer’s and replacement materials. Left and right handed types in a range of lamination and finishes.
  • Crystal and cube polarizer’s.
  • Large stock sheet polarizers available for custom sizes at short notice.
  • Over 98 stock polarizer options online.

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Polarizers

Retarders

  • An assortment of retarders for use in UV Visible and NIR wavebands.
  • Original 3M plastic polarizer’s, 140nm ¼ wave visible, 200nm NIR ¼ wave, 280nm ½ wave visible, 530nm 1 wave visible, 560nm 1 wave visible. In sheets up to 12” square.
  • Mica and Quartz retarder plates in a range of wavelengths from 400-1500nm in standard 25mm dia laminated plates.
  • Achromatic retarders made from quartz crystal in wavelengths from 450-1650nm.
  • Stock sheets available for custom sizes at short notice.
  • Over 20 stock plastic type retarders’ options online.
  • Over 70 stock quartz and mica retarders available online.

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Retarders

Metal Optics

  • A range of Metal Optic solutions for use as flat, concave and parabolic reflectors applications.
  • Materials: Copper, aluminum, brass, nickel and stainless steel.
  • For use in solid-state lasers ranging from 400nm to 1.5 µm.
  • Complex geometry available..
  • Surface roughness less than 20 angstroms.
  • Surface accuracy to ¼ wave.
  • A range of visible and NIR coatings available.

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Metal Optics

Optical flats

  • Optical flats used as reference surfaces for testing of components.
  • Double sided or single sided polished for high accuracy front surface mirrors.
  • Standard materials Quartz, UV Fused silica and Zerodur.
  • Up to 500mm diameter and lambda/20.
  • Reconditioning of optical flats service available.
  • All tested using our Zygo Verifire XPZ interferometer system fitted with the latest Mx® software and are supplied certified in a quality wooden box.
  • A range of Monochromatic lights available, free standing or bench top options.
  • Over 35 standard optical flats available.
  • Over 15 stock Monochromatic light sources available.

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Optical flats

Sapphire optics

  • Sapphire optics for harsh environment applications.
  • UV grade fluorescent free sapphire windows and lenses for use at 150nm to 5.5 µm.
  • Random-cut grade windows up to 320mm diameter x 50mm thk.
  • C-cut and Z-cut sapphire windows and for non-birefringent critical applications.
  • Sapphire domes for high pressure UAV applications.
  • Surface quality, Scratch/Dig<60/40 available.
  • Small 5mm diameters x 0.5mm or thinner wafers available.
  • A range of BBAR coatings can be applied.
  • Over 39 standard sapphire components available.

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Sapphire optics

Germanium optics

  • Germanium optics for use at 2µm to 14µm used in thermal imaging applications.
  • Germanium windows and wedge prisms up to 300mm diameter.
  • Diamond turned and conventional polished aspheric, spherical and meniscus lenses up to 200mm diameter.
  • A range of AR and DLC coatings to cover 2-14 µm spectrums.
  • Hydrophobic and Petrochemical coatings.
  • Surface quality <40-20 scratch dig.
  • Small 5mm diameters. Diced squares and rectangle. Custom rebated windows to your specific requirements.
  • Stock windows available online.

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Germanium optics

Z-Cut quartz optics

  • Quartz, a birefringent material so an ideal choice for polarizers..
  • Left and right handed Z-cut quartz to 150mm diameter.
  • Flatness and TWE better than ¼ wave and parallel to 3 arc minutes, 40-20 scratch dig.
  • A range of BBAR coatings available.
  • Prisms for polarizers in a range of sizes.
  • Spherical and meniscus lens options available.
  • Over 20 standard components available.

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Z-Cut quartz optics

Silicon optics

  • Silicon optics for use at MWIR 3µm to 5µm used in thermal imaging applications.
  • Silicon is an ideal material for detecting black body temperature of 700K.
  • Windows and wedge prisms up to 300mm diameter.
  • Diamond turned and conventional polished aspheric, spherical and meniscus lenses up to 200mm diameter.
  • A range of AR and DLC coatings to cover 2-5µm spectrums.
  • Hydrophobic coatings.
  • Surface quality <40-20 scratch dig.
  • Small 5mm diameters. Diced squares and rectangle. Custom rebated windows to your specific requirements.
  • Standard stock silicon windows available online.

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Silicon optics

Calcium fluoride optics

  • Calcium fluoride optics for vacuum ultra-violet in detector applications.
  • A range of Caf2 windows and lenses available.
  • Diamond turned aspheric and meniscus lenses, also traditional spherically polished Caf2 lenses available.
  • Raman/ standard and UV grades available.
  • Diameters up to 200mm with ¼ wave flatness and 40-20 scratch dig.
  • BBAR coatings available from 200nm to 10µm.
  • Over 58 standard window and lens components available online.

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Calcium fluoride optics

Magnesium fluoride optics

  • Magnesium fluoride optics for deep UV applications down to 100nm. And IR applications to 7µm
  • Windows up to 50mm diameter and 5mm thk.
  • Flatness to ¼ wave and 20-10 scratch dig.
  • BBAR coatings available from 1-7µm.
  • Standard stock MgF2 windows available online.

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Magnesium fluoride optics

Zinc Selenide optics

  • Zinc Selenide window solutions for “forward looking infrared radiometer and CO2 laser applications.
  • Window diameters from 5-100mm.
  • Diamond turned aspheric and meniscus lenses, also traditional spherically polished ZnSe lenses available.
  • Very wide IR wavelength use from 0.6µm to 21µm
  • Beamsplitter options available.
  • Mounting into cells available.
  • BBAR coatings available..
  • Surface quality <60-40 standard.
  • Small 5mm diameters to larger 100mm diameters available.
  • Square and rectangular options available when being used as beamsplitter components.
  • Over 22 standard Zinc Selenide lenses and windows available.

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Zinc Selenide optics

Infrared filters

  • A range of infrared optical filter solutions available.
  • Bandpass filters to 20µm.
  • IR longwave and shortpass filters.
  • Infrared neutral density filters.
  • Gas-band filters.
  • Semiconductor filters.
  • Diameters, squares and rectangles to very small sizes down to 2x2mm for use in detectors.
  • A large off-line range of stock filter options available.

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Infrared filters

Other Infrared optic solutions

  • A range of other infrared material solutions are available.
  • Barium fluoride (15 online stock window options)
  • KRS 5N (3 online window options)
  • Potassium bromide (7 online window options)
  • Sodium chloride (4 online window options)
  • Stock windows and lenses available online.

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Other Infrared optic solutions

Optical tools and accessories

  • Filter storage boxes.
  • Vacuum pick up tools and systems including accessories.
  • Cleaning and packing cloths.
  • Surface blowers and brushes.
  • Optical cleaning agents.
  • Lab gloves and finger cots.
  • All available from stock online.

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Optical tools and accessories

Optomechanics

  • A range of optomechanical components and accessories for a complete range of mounting and positioning options.
  • Camera filter holders designed to fit standard 25mm dia filters with M25.5 and M30.5 thread, ready for fitting to Tamron, Fujinon and Sony camera lenses.
  • Self centering component holders.
  • Adjustable component holders.
  • Fitted component holders.
  • Breadboards and bases up to 800mm square.
  • Mounting posts.
  • Post holders
  • Post clamps.
  • Post thread adaptors.
  • Over 200 standard opto-mechanics available.

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Optomechanics
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