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Linear sheet polarizers are used for a broad range of applications including the production of LCD monitors and TVs, photography and other lighting and entertainment systems such as projectors. Our UV and IR sheet polarizers extend the spectral range down to 290m for the HNP’B replacement material and HR is used between 800nm to 2000nm. We have extensive stock of HR material in 76.2mm square sheets. The range from 800-860 the HN7 type offers superior performance at a reduced price. Working below 800nm HN22 is an ideal choice. Knight Optical supply linear sheet type polarizers in a range of types. These sheet polarisers were formerly supplied by Polaroid/3M under the Vikuti brand. Although these sheets have since been made obsolete by the manufacturer, Knight Optical holds substantial stock of the original material including HN32, HN38 and HN42, and performance HN22, HN38S and HN42HE high extinction sheets Read PDF for information

λ/10 mirrors are used in the aerospace environment due to the vibration - Knight Optical can offer you stock and custom lambda/10 mirrors for use in government testing for aerospace, in a range of materials such as BK7 or equivalent, Zerodur, Quartz, UV Fused Silica and many more. Mirrors are made from low expansion glass for optimum stability to maintain the lambda/10 flatness. The mirrors help produce high quality images and can be coated with a variety of coatings to ensure that the perfect quality image in the wavelength you require is achieved: Enhanced aluminium 94%R for visible applications. 99.9% dielectric for laser use in visible applications. UV aluminium for UV applications down to 180nm. 98.5% dielectric for laser use in the NIR applications. Ion plated silver for NIR-2000nm applications. Protected gold for 750nm to far infra-red applications λ/10 mirrors are used in the aerospace environment due to the vibration, temperatures & pressure through which they are exposed. To Find out More read the PDF Material::Soda lime float glass Diameter::+0 / -0.2 mm Length/width::±0.1mm Thickness::+0.1 / -0.2mm Surface quality::<40:20 scratch/dig Flatness::λ/10 over 90% of mirror aperture (Rear is commercial polish)

We supply a range of Visible Sheet Polariser for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers within Consumer Electronics. Our Linear Polarisers linearly polarise unpolarised light and can block light that is polarised in the opposite direction. Linear Polarisers are often used in the production of LCD monitor and TVs. The liquid crystals act like a wave-plate, rotating the polarisation axis allowing them to control the amount of light from each pixel. They are used in a similar way for a photographer to prevent surface reflections from water. Our polariser sheets allow different levels of total light from a randomly Read PDF for more information... Shapes: :Circular Polarisers, Square Polarisers Dimensional Tolerances::+/- 0.5mm Surface Quality: :< 60-40 Scratch/Dig

This multi-functional, highly stretchable product is used across a number of industries, including Healthcare & Medical, Outdoor and Recreation. Exoskin is the stretchiest product in the Dartex® range. Featuring a high extension, low modulus stretch, Exoskin can be used for pressure redistributing applications within Healthcare & Medical environments, such as prosthetics & orthotics. With excellent thermo-forming properties when used with foam, Exoskin is also used within medical furniture and seating applications. Formulated with an aliphatic polyurethane, Exoskin has the added benefit of UV resistance; making it well suited for outdoor uses, such as cuff and neck seals on outdoor apparel, bike seats, body contour apparel, wet suits and kayak skirts.

We supply a range of Wedge Prisms for a range of applications. All individually QA checked, and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers within Forestry. Wedge Prisms are used in a similar manner to an angle gauge, when plotting the basal area of a group of trees. Wedge prisms are also used in beam steering. All our Wedge Prism are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Starrett AV300 Video Imaging System and our Trioptics PrismMaster. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components. Read PDF for more... Material::N-BK7 or equivalent Dimensional Tolerances::+/- 0.15mm Angles::+/- 30 arc seconds Surface Figure: :< 0.25 waves Surface quality::< 40-20 Scratch/Dig Coating::A range of AR coatings are available for your chosen wavelength.

Knight Optical can offer Lithium Fluoride Lenses for use within UV Applications. We supply a range of lithium fluoride lenses for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers using UV optics such as UV lasers. UV lasers are beneficial in some applications as opposed to longer wavelengths such as infrared or visible light as they do not heat the areas around the target. This allows the laser the cut materials by breaking atomic bonds, rather than melting the material. Due to the large band gap for Lithium fluoride, it’s crystals are more transmittive to short wavelength UV radiation than any other material and are ideal for use in X-Ray monochromators, as for use in VUV, UV, Vis and IR spectrums. For more info read PDF… Material::Lithium Fluoride (LiF) Shape::Spherical Lenses, Cylindrical Lenses Dimensional Tolerances::+/- 0.1mm Parallelism::< 3 arcminutes Surface quality::<60-40 Scratch/Dig Coating::Antireflective coatings for application bandwidth (if required)

Knight Optical can offer Biconvex Lenses for use within Optical Systems. We supply a range of Biconvex lenses for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers with Optical systems. Biconvex lenses are simple lenses with a two convex surfaces, usually of the same radius and have a broad range of applications including, but not limited to, focussing and control of laser beams, moderate quality imaging and other optical instruments. Read PDF for more information…. Material::N-BK7 or equivalent, UV Fused Silica, SF11 or equivalent Dimensional Tolerances::+/- 0.1mm Centering::< 3 arcminutes Surface Quality: :< 40-20 Scratch/Dig Surface Figure::< 5(1) @ 633nm Coating::Antireflective coatings for application bandwidth (if required)

A range of polyurethane coated fabrics, coated scrims and polyurethane films for use in the manufacture of surgical equipment. Trelleborg Engineered Coated Fabrics manufactures a variety of polyurethane coated fabrics, polyurethane coated scrims and polyurethane films at a range of thicknesses which can be slit to width as required. The Surgical textile range includes fully transparent or pigmented polyurethane which can be reinforced with ripstop nylon scrims or textile backings to provide strength and durability in life-saving situations. Our polyurethanes are skin safe and incredibly soft for ease of handling when in surgical use. Coatings are pin-hole free – essential during surgical procedures and for infection control. Applications include: • Endoscopy bags • Laparoscopy bags • Surgical recovery bags • Surgical wound retractors / wound protectors

Germanium windows, in IR sensors, medical apps, pyrometry & IR imaging systems - Are you looking for a popular high refractive index and good IR transmission range material covering from 1.8-16µm? Here we are; Knight Optical’s Germanium glass material is ideal for your IR applications with its broad transmission range and opacity in the visible portion of the spectrum. Our Germanium windows are not only used in IR sensors, medical applications, and pyrometry; but also in IR imaging systems, and thermographic cameras. Typically operating in the 2µm to 14µm spectral range; that covers the LWIR (8-12μm) and MWIR (3-5μm) thermal imaging wavelength range. Our Germanium windows are available from stock, custom size and shape with Anti-Reflection coatings on one or both sides, and/or with Hard Carbon Diamond coatings. Read our PDF for more details... Material::Germanium Diameter Tolerance::Up to 300mm +0, -0.02mm Thickness Tolerance::+/- 0.2mm Flatness::< 2 waves over 90% aperture Surface quality::< 40-20 scratch/dig Parallelism::5 arcmin Coating::AR/DLC (Diamond like coating @ 7-14 micron)

Intense Pulsed Light Systems use not only use filters, that are used to filter out the UV wavelength range; and transmit between 400-1200nm for use within cosmetic lasers that are designed to remove unwanted hair, vascular treatment and even acne treatment. But they also use Homogenizing Rods to help evenly distribute light. The Light source will enter a light pipe at a variety of incident angles, which is designed to utilise its total internal reflection to channel the light from the entrance of the light pipe to the exit. The material’s refractive index is the only factor which affects the light pipes critical angle; this defines the angle of acceptance which the total internal reflection will occur at. All our Homogenizing Rods are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Trioptic’s PrismMaster, and Starrett AV300 Video Imaging System.. FOR MORE INFORMATION READ PDF.. Length Tolerance::+/- 0.3mm Aperture Tolerance::+/-0.1mm Surface quality::<60-40 Scratch/Dig Coating::Optional

Knight Optical can offer IR-cut filters for use in Heat Shielding. We supply a range of Custom and Stock IR-cut filters for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers with Heat Shielding requirements. Our IR-cut filters allow good transmission levels of visible light but cut off IR and UV radiation. Our precision grade filters have an AR coating to increase their visible transmission. In many systems that require heat shielding while still needing visibility an IR-cut filter can be used. These can attenuate infrared radiation and allow through visible light, allows your temperature sensitive equipment For more information read the PDF…… Material::Borosilicate Dimensional Tolerances::±0.2 Transmission::Tavg>90% 420-620nm (Standard Grade) Transmission::Tavg>94% 420-620nm (Standard Grade) Blocking::Tmax<2% 700-1000nm Wavelength Accuracy: :±10nm Surface Accuracy:60/40 (Standard Grade) Surface quality::60/40 (Standard Grade)

Knight Optical can offer you Stock and Custom Fresnel Lenses, for use within Magnification Displays in a range of materials such as PMMA Acrylic and Borosilicate. We supply a range of Fresnel Lenses for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Our Fresnel Lenses consist of a flat surface with interspace concentric steps whereby each step corresponds to the surface of a conventional lenses. PMMA Acrylic is a preferred material type of the Magnification Displays as it is very lightweight when used in a large size. Fresnel lenses is a common focal length equivalent to a traditional lens, but with a fraction of the thickness. Additionally, because the lens is so thin little light is lost by absorption. Read PDF for more information…. Material::PMMA Acrylic/ Borosilicate Center thickness::+/- 0.2mm Clear aperture: :Nominal Standard range:± 5% Precision range:± 2% typically (± 5% manufacturing data) Design condition::Parallel light on grooved side

Skin-safe, durable coated textiles for use in the manufacture of ambulatory and pneumatic tourniquets. Tourniquets are non-invasive medical devices that are used on patient limbs to restrict blood flow in a specific area in order to achieve a bloodless surgical field. A tourniquet often has tubing inserted to allow air to pass through, which inflates the cuff and restricts the blood flow. There will also be a plastic insert used to give the cuff strength. Types of cuff are: Ambulatory Tourniquet The key feature of this cuff is that there should be no air loss within the system, as high pressure is required to ensure the patient has the best possible chance of surviving transport. Pneumatic Tourniquet / Surgical Tourniquet These can be single or dual-bladder cuffs designed to create a bloodless surgical field by applying pressure to blood flow in a limb. They are used during surgical procedures, quite often for orthopedic surgery, such as knee replacements.

The Dartex® Endurance range was specifically engineered to withstand harsh chemical cleaning. With its exceptional lifetime, is this the toughest healthcare fabric in the world? CHEMICALLY RESISTANT The special polyurethane coating, specifically designed to resist chemical attack has been proven in case studies to lead to a 10-fold reduction in failure rate as a result of coating deterioration (27% to 1.9%). Better chemical resistance leads to: • reduced risk of hospital acquired infections • increased lifetime value of the mattress • lower mattress replacement rate, which in turn greatly speeds up and simplifies the process of auditing mattresses. BREATHABILITY The moisture vapour transmission (MVT) properties of PU keeps skin cool and dry, unlike PVC which doesn’t ‘breathe’ STRETCH & RECOVERY Essential for pressure redistribution and the prevention of avoidable pressure injuries EASILY CLEANED Either wipe clean or machine washable APPLICATIONS.

Knight Optical can offer infra-red interference Shortpass filters for use in Heat Shielding. We supply a range of infra-red interference Shortpass filters for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers in Heat Shielding. Infra-red interference Shortpass filters are designed to transmit wavelengths shorter than the “cut-off” of the filter and to block bands above that. In many systems that require heat shielding while still needing visibility a shortpass filter can be used. These can attenuate infrared radiation and allow through visible light, which allows your temperature sensitive equipment to be visible. They can also be paired with a longpass filter to make a bandpass filters. Read PDF for more Information….. Material::(Fused Silica/Silicon/Germanium) Diameter & aperture (mm)::12.5mm ±0.1 (8.5mm aperture) Thickness (mm)::≤6.1mm +0/-0.1 CWL tolerance (nm)::± 20% of FWHM FWHM tolerance (nm): :± 20% of FWHM Optimum operating temp::23°C Edge treatment::Mounted in black anodized aluminium ring Surface quality: :80/50 Per MIL-0-13830A Usable temperature limits::-50°C to +80°C

Knight Optical can offer UV Fused Silica Lenses for Solid State Laser applications. UV FS is a prime choice for lenses in use with Solid State Lasers due to its consistently high transmission in the UV/VIS/NIR regions. This means that it can be used with a range of different laser types, such as Titanium-doped sapphire (tuneable to 660-1080nm) or Alexandrite (tuneable to 700-820nm) with very little change in performance. UV FS is comparable to N-BK7 or other similar optical glasses in its performance, having a very similar average transmission over the VIS range up to approximately 2000nm and a slightly lower refractive index. The Abbe constants of UV FS are also very similar to that of N-BK7, although slightly higher. Read PDF for full specification Material::UV Grade Fused Silica Operating Wavelength:587nm Diameter Tolerance::+0 / -0.10mm Centring Tolerance::<5 arc min Focal Length Tolerance::± 0.2mm (<10mm) ±2.0% (10mm – 1000mm) Centre Thickness Tolerance:±0.2mm

An advanced technology used specifically within retinal imaging and analysis - Optical Coherence Tomography otherwise known as OCT is an advanced technology used specifically within retinal imaging and analysis. This non-invasive technology was designed to provide highly detailed images of the retina as well as the optic nerve. It uses light waves to take cross-section images of your retina, using OCT it is possible to see each of the retina’s distinctive layers. Within OCT’s, a light source with a broad optical bandwidth is used for illumination and is split by a Non-Polarising Beam-Splitter into 2 paths referred to as the reference and sample arms. The light from both the reference and sample arms are reflected back and combined at the detector. An interference effect is seen at the detector in the reference and sample arm only if the time travelled by the light is nearly equal. Read PDF for more info Material::N-BK7 or Equivalent; UV Grade Fused Silica Dimension Tolerances::+0, -0.02mm Flatness::λ/4 over 25mm Surface Quality::<40/20 Scratch/Dig Angles::+/-1 arcmin Coatings::Typically 50:50; 70:30; 90:10 Ratio Split

Knight Optical can offer Circular Sheet Polariser for use within Photographic Applications. We supply a range of Circular Sheet Polariser for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers within Photographic Applications. Our Circular Polarisers consist of a quarter wave plate cemented to a linear polariser. While a linear polariser may be used to reduce glare during photography (such as reflection from the surface of a body of water), autofocus systems struggle to correctly focus on linearly polarised light. With the addition of the quarter wave plate, this has little impact on the intensity of incident light to the sensor, but it makes autofocussing much easier. For more information read PDF… Shapes: :Circular Polarisers, Square Polarisers Dimensional Tolerances::+/- 0.5mm

Introducing sensing solutions for medical support surfaces from Dartex®. This innovative technology developed exclusively for use with Dartex® coated textiles, offers multiple sensing solutions for monitoring the patient condition in real time. Utilizing the latest knitting technologies, the sensors are woven into the textile and protected with industry trusted Dartex® polyurethane. When integrated with the bed system, vulnerable pressure points can be monitored and the sensors alert the patient and/or carer to reposition, either physically or mechanically. This eliminates the need for unnecessary interventions by the caregiver. Sensors can be configured to monitor; incontinence, humidity, movement, pressure and more… KEY BENEFITS • All key support surface properties maintained – functions as a support surface for avoidable pressure injury prevention • Eliminates the need for additional medical devices • No additional layers between patient and support surface

Knight Optical can offer Rhomboid Prisms for use within Imaging Applications. We supply a range of Rhomboid Prisms for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers within Imaging Applications. Rhomboid Prisms are designed to displace a beam laterally while maintaining its direction. Rhomboid prisms rely on total internal reflection and so do not often need to be coated For more information read the PDF… Material::N-BK7 or equivalent Dimensional Tolerances::+/- 0.2mm Angles::+/- 3 arc minutes Surface Figure::< 1 waves Surface quality::< 40-20 Scratch/Dig Coatings::< AR Coatings available on request

Sapphire (Al2O3) is one of the hardest minerals and optical materials available for use in the range from UV up to 5µm. Sapphire is birefringent and if its use is for critical optical application then the crystal might have to be cut along the zero degree plane, or C-Cut. Random cut is usually cut along a plane that is 60° off-axis as the growth in this direction is the easiest to grow. Random cut is anything that is not the C-Cut angle. Sapphire can fluoresce depending upon the concentration of other minerals within the lattice, for example Iron (Fe) or Chromium (Cr). Clear Sapphire might fluoresce orange when illuminated by UV light if impurities are in the crystal. Fluorescent free Sapphire has to be grown from 'pure' feedstock and seed and in an environment that cannot place impurities into the lattice. Click PDF link to read more …... Material::Random-Cut Sapphire Diameter::+0.0 / -0.20 mm Length,width::±0.1 mm Thickness::±0.1 mm Flatness::<5λ Surface quality::<60-40 scratch/dig Parallelism::5 arc min

Due to high intensity light from the laser, mirrors used with a laser application require a high damage threshold, and high reflectivity. Knight Optical can help! Laser mirrors are used to reflect or redirect the laser. This manipulation of the beam means it is great for laser applications where there is limited space, as the beam can be steered multiple times. We manufacture mirrors used in the UV/VIS/NIR and infrared. We provide a number of mirrors from stock with coatings at infrared wavelengths such as: Dielectric (98% NIR) Protected Silver (96% VIS/NIR) Protected Gold (97%@750-FAR IR) These are available to purchase from stock in a wide ranges of sizes from 6.3 mm in diameter to a 300mm x 300mm square and various different thicknesses. They are also available with varying flatness specifications with λ/10 also available for immediate shipment and for you to achieve the highest performance. Read PDF for full specification..

Knight Optical can offer you stock and custom lambda/10 mirrors for use in imaging applications, in a range of materials such as BK7 or equivalent, Zerodur, Quartz, UV Fused Silica and many more. Mirrors are made from low expansion glass for optimum stability to maintain the lambda/10 flatness. The mirrors help produce high quality images and can be coated with a variety of coatings to ensure that the perfect quality image in the wavelength you require is achieved: •Enhanced aluminium 94%R for visible applications. •99.9% dielectric for laser use in visible applications. •UV aluminium for UV applications down to 180nm. •98.5% dielectric for laser use in the NIR applications. •Ion plated silver for NIR-2000nm applications. •Protected gold for 750nm to far infra-red applications Lambda/10 mirrors are used to produce a better quality signal from the mirror, resulting in a higher quality imaging. Read PDF for more information… Material::N-BK7 (or equivalent), Zerodur, UV Fused Silica, Borosilicate Shape::Circular, Square or rectangular Dimensional Tolerances::+/- 0.5mm Parallelism::< 3 arcminutes Surface quality::<10-5 Scratch/Dig Flatness:: λ/10 or λ/20 over 90% of mirror aperture Coating::A range of mirror coatings to suit your wavelength

Knight Optical can offer UV Fused Silica Lenses for Flame Detection Applications. UV Fused Silica can be used in Flame Detection Applications, due to its high transmission into the NIR range (approximately <92% avg 400-2000nm) meaning that a clear distinction can be made between different wavelengths of light. UV FS also has a very low coefficient of thermal expansion 0.55x10-6K-1 at 300K) compared to N-BK7 (7.1x10-6K-1), meaning that it can still provide optical performance under high temperature. UV FS also has a high melting point compared to N-BK7, providing further protection for your application in high temperature environments. UV FS is comparable to N-BK7 or other similar optical glasses in its performance, having a very similar average transmission over the VIS range up to approximately 2000nm and a slightly lower refractive index. The Abbe constants of UV FS are also very similar to that of N-BK7, although slightly higher. Read PDF for more info Material::UV Grade Fused Silica Operating Wavelength::587nm Diameter Tolerance::+0 / -0.10mm Centring Tolerance::<5 arc min Focal Length Tolerance::± 0.2mm (<10mm) ±2.0% (10mm – 1000mm) Centre Thickness Tolerance::±0.2mm Surface Figure::3/ 3 (1) Surface Quality: :<40-20 Scratch/Dig Coating::Optional

KO can offer Metallic Neutral Density Filters for use in Photographic Applications. We supply a range of Metallic Neutral Density (ND) Filters for a variety of applications – all individually QA checked and metrology tested for quality to ensure parts meet customers’ specifications. What’s more, our Metallic ND Filters are supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Our Metallic ND Filters reflect (with a metallic coating) light neutrally over a wavelength range (typically visual). They can be used to lower the intensity of light prior to the image plane. These are often used in photography, allowing photographers more flexibility with their setups to achieve desired effects. Often, an ND filter will be used in conjunction with a long exposure to prevent washed-out and overexposed images. They can also be used to add motion blur, reduce depth of field and to use a wider aperture. For more information read PDF… Shapes: :Circular Filters, Square Filters Dimensional Tolerances::+/- 0.1mm Flatness::< 5(1) @ 632.8nm Surface quality::< 40-20 Scratch/Dig

Knight Optical offer a range of Stock Ball Lenses and Half Ball Lenses, for use within Fibre Lasers. As the name suggests ball lenses are completely spherical lenses mostly made out of High Refractive Index Glass such as Sapphire, and LASFN-9 Glass. The reason ball lenses are most commonly used is for their ability to focus light when leaving a fibre optic, so that it can therefore be used for a laser application. The key feature of ball lenses is their short back focal length allowing for precision coupling where size or space is a limiting factor in the system. Ball lenses are typically used in pairs with one lens acting as a collimator for the second to focus the light back into the coupled fibre. Where a more compact solution is required a half-ball lens is typically more suitable. We hold a large inventory of Ball Lenses. •Stock sizes from 0.5 5mm to 10mm diameter. •Custom sizes available to quotation. •Half Ball lenses also available. Material::BK7 or equivalent, Sapphire, Ruby, Quartz Diameter Tolerance::+/-2.5µm Figure (sphericity)::1λ Focal Length Tolerance::± 0.2% (<10mm) Wavelength Range::0.17 – 5.5µm Surface quality::<40-20 Scratch/Dig

Knight Optical can offer you Custom Sapphire Cylindrical Lenses, for use within Endoscopes. We supply a range of Sapphire options for a variety of applications – all individually QA checked and metrology tested for quality to ensure parts meet customers’ specifications. What’re more, our Sapphire Cylindrical Lenses are supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Sapphire (Al2O3) is one of the hardest minerals and optical materials available for use in the range from UV up to 5µm, making it ideal as a protective window for camera systems. Cylindrical lenses are designed to focus light into a straight line, rather than to a single point. As the name suggests, the lens surface has a cylindrical shape rather than the usual spherical formation, which allows for one-dimensional shaping of light along a line. Cylindrical lenses are often used to change the profile of laser beams; for example Read PDF for more info Dimensional tolerance: :+/- 0.1mm Figure (sphericity)::1λ Focal Length Tolerance::± 0.2% (<10mm) Wavelength Range::0.17 – 5.5µm Surface quality::<40-20 Scratch/Dig Coating::A range of Anti-Reflective (AR) coating options

Knight Optical can offer UV Fused Silica Windows for Vacuum Applications. UV Fused Silica is a relatively hard optical glass with a very low coefficient of thermal expansion. This means that it is a good choice for us in Vacuum applications, as any difference in temperature will not affect the optical performance. In addition to the above, UV FS has high transmission from UV to NIR meaning that there is little loss of image when it is used for a Vacuum Window/viewport and therefore the quality of the optical system is not compromised. All our UV Fused Silica Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Trioptics Optispheric, and Starrett AV300 and Zygo Verifire XPZ. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components Read PDF for more info Material::UV Grade Fused Silica Operating Wavelength::587nm Diameter Tolerance::+0 / -0.10mm Centring Tolerance::<5 arc min Focal Length Tolerance::± 0.2mm (<10mm) ±2.0% (10mm – 1000mm) Centre Thickness Tolerance::±0.2mm Surface Figure::3/ 3 (1) Surface quality::<40-20 Scratch/Dig Coating::Optional

Knight Optical can offer you Plane Mirrors (general, λ/1 and λ/4), for use within Fibre Optic Applications in a range of materials such as Soda-lime float glass, white float glass, and BK7 glass. Our plane mirrors are used within fibre optic applications such as testing the fibre optic signal to help understand the strength of the signal. Plane mirrors also known as front surface mirrors or first surface mirrors are used widely within Fibre Optic applications. As stock we hold many general purpose, λ/1 and λ/4 with a range of up to 6 types of coatings such as Enhanced Aluminium, Ali/SiO2 and Ali/Mgf2. Our general purpose grade mirrors are made from good quality float glass and generally available in thicknesses of 1mm, 3mm and 6mm as standard. READ PDF FOR MORE INFORMATION Material::Soda lime float glass, BK7 or equivalent Diameter Tolerance::+0/-0.2mm Lengths/ width::±0.3mm (≤100mm), ±0.5mm (>100mm Thickness::±0.25mm Surface quality::<60-40 scratch/dig for general purpose, <40-20 scratch/dig for λ/4 1.1mmthk::1λ over 10mm dia. 3/6mmthk: :2λ over 25mm dia. Parallelism::<3 arcmin

Knight Optical can offer Gelatine Neutral Density Filters for use in Photographic Applications. We supply a range of Gelatine Neutral Density Filters for a range of applications. All individually QA checked and metrology tested for quality to ensure parts meet customer specification. Supplied in a range of sizes and shapes with custom coatings tailored to meet your individual applications. Knight Optical supply precision optical components to customers within Photographic Applications. Our Neutral Density Filters attenuate light neutrally over a wavelength range (usually visual). They can be used to lower the intensity of light prior to the image plane. These are often used in photography, allowing photographers more flexibility with their setups to achieve the desired effects. Often an ND filter will be used in conjunction with a long exposure to prevent washed out and overexposed images. For more information rread the PDF …. Shapes::Circular Filters, Square Filters Dimensional Tolerances::+/- 0.1mm Density::+/- 5% Surface Quality: :< 60-40 Scratch/Dig