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Stock & custom precision optical filter in materials such as Schott Kopp & CDGM - Knight Optical can offer you Stock and Custom Colour Glass Filters, for use within Inline Cameras in a range of materials of brands such as Schott, Kopp and CDGM. Depending on the achievable wavelength and desired affect you need for the Inline Camera we can find a suitable material for your application. Colour Glass Filters are good for selecting a particular wavelength to be absorbed so that the high out of band blocking in achieved. With regards to the use in Inline Cameras, Colour Glass Short pass Filters are more desirable as they cut out the IR wavelengths mean the imaging is not saturated with the IR giving the image better clarity. Colour Glass Filters are polished sheets of special glass that have been cast with a dye. Colour Glass Filters generally are relatively cheap and very stable. The disadvantage with them is that they are only available in a relatively small number of variants, and so can be restrictive in shortwave selection.  For More Info see PDF... Material::Color glass Diameter::+0.0 / -0.20 mm Length / width::± 0.20 mm Thickness::± 0.20 mm Surface quality::<60-40 scratch/dig Parallelism::<3 arcmin

Knight Optical We can offer Custom Moulded Aspheric Lenses for use with Laser Diode Collimators. Aspheric lens surfaces are used to correct spherical aberration (where the converging light from a lens does not have a common focal point, resulting in a distorted image) in lasers and imaging. Traditional spherical lenses cannot collimate light effectively because even small angles of incidence can produce spherical aberrations. This can mean that several components may be required to get the desired result. The non-spherical surface of an aspheric lens allows a single component to effectively focus or collimate even highly divergent emissions, potentially replacing a multi-lens system with a single aspheric lens. Therefore Aspheric Lenses that are moulded are ideal for use within laser diode-to-fibre coupling applications. For more information read PDF …. Material::Optical Glass or Acrylic Overall Diameter Tolerance::+/-0.2mm Focal Length Tolerance::± <5% Surface quality::<60-40 Scratch/Dig Coating::Optional

Knight Optical can offer you stock and custom lambda/10 mirrors for use in Spectromters, 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 signals 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 result for transmission. Read PDF for full spec 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)

Knight Optical can offer Littrow Prisms for use within Laser Applications. We supply a range of Littrow 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 Laser Applications. Littrow Prisms are used near the end of an optical cavity of a laser system to finely adjust the output frequency by changing the AOI of the prism. For more information read PDF … Material::SF11 or equivalent, F2 or equivalent, UV grade fused silica Dimensional Tolerances::+/- 0.2mm Angles::+/- 1 arc minutes Surface Figure::< 0.5 waves Surface quality::< 40-20 Scratch/Dig Coating::Antireflective < 0.2% @ 550nm

Knight Optical supply stock and custom deviation penta prisms that cover the visual and NIR range. Deviation prisms are an optical component that will redirect a light beam into another known angle relative to the incoming beam. The penta-prism is a deviation prism which is used in cameras with a movable mirror that bends the beam vertical onto the focus graticule. The penta-prism provides a 90° deviation of the beam from the focus plane and, via an eyepiece, the user can aim the camera along the same axis as the beam that is focused onto the detector, electronic or wet film. Deviations through other angles can be accomplished using, for example, abbe constant deviation, littrow, and wadsworth prisms. Read PDF for more info Material::N-BK7 or equivalent Dimensions::±0.1mm Angles::±1 arcmin Surface quality::<40-20 scratch / dig Coating::Anti Reflective and mirror coatings are available on request.

Knight Optical can offer transmit and receive windows and mirrors for LIDAR systems using visible, NIR (0.9 to 1.5µm) and Mid-Waveband Infra-Red (MWIR, 3 to 5µm) light. Since the 1960s, scientists have used LIDAR (light detection and ranging) to study the atmosphere. Short pulses of laser light are used to detect particles or gases in the atmosphere, like a radar bounces radio waves off rain drops in clouds. A telescope collects and measures reflected laser radiation, like a radar dish collects the radar signal, leading to a profile of the atmosphere's structure along the path of the laser beam. Researchers can then determine the location, distribution, and nature of atmospheric particles and molecular species using an advanced LIDAR method called the Differential Absorption Lidar (DIAL) technique. Read PDF for more information Material::BK7, Borosilicate, Quartz, Fused Silica or Sapphire (AL2O3) Diameter Tolerance::+0.0/-0.20 mm Length/Width Tolerance::+/- 0.10mm Thickness Tolerance::+/-0.10mm Wavelength Range::0.17 – 5.5µm Transmission::Tavg=85% dependant on substrate thickness

At Merefields Electronics we have built a network of suppliers and manufacturers to provide our customers with total electronics distribution. Our Electro Mechanical product range includes LED displays and we support key manufacturers such as Omron; Erni; Phoenix; Radiall; Degson Please send me an enquiry via liamm@merefields.com or enquires@merefields.com

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)

Plane Mirrors (general, λ/1 and λ/4), for Laser Distance Measurement Application - Knight Optical can offer you Plane Mirrors (general, λ/1 and λ/4), for use within Laser Distance Measurement Applications in a range of materials such as Soda-lime float glass, white float glass, and BK7 glass. Plane mirrors also known as front surface mirrors or first surface mirrors are used widely within Laser Distance Measurement applications. As stock we hold a number of 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. Laser Distance Measurement devices utilise the use of a laser beam to be able to determine the distance of an object. How optical mirrors are used in conjunction with these devices is that, a mirrored surface can be measured with a laser tracker; which will help determine the distance between the laser distance Read PDF for full 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

We supply a range of Telecom Grade Windows for a range of applications - Knight Optical can offer Telecom Grade Windows for use within Fibre Optic Applications. We supply a range of Telecom Grade Windows 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 Fibre Optic Applications. Our Telecom Grade Windows are coated to minimise reflection in the telecoms waveband. These windows are optimized for fibre optic applications in the S and C bands between 1460nm to 1565nm while maintaining excellent transmission out of the operating wavelength. For more information read PDF… Material::B270 or equivalent, White Float Shape::Circular Windows, Square Windows Dimensional Tolerances::+/- 0.1mm Parallelism::+/- 5 arc minutes Surface Figure: :< 5(1) @ 633nm Surface quality::< 40-20 Scratch/Dig

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

Knight Optical can supply you with custom made Diamond turned aspheric lenses for use within autonomous vehicle LiDAR systems. Autonomous vehicle LiDAR systems create driverless cars. Whereby the system produce autonomous vehicles which can perform complex manoeuvers and drive in public with little or no input from a user. Spherical aberration occurs in common singlet lenses, which results in an image that appears distorted, aspheric lenses correct spherical aberration. An aspheric lens surface is designed non-spherical, which allows a single component lens to collimate or focus highly divergent rays potentially replacing a multi-lens system. This in turn provides the LiDAR system with a better signal quality, at lower costs whilst making the system more compact. Knight Optical offers diamond turned aspherics from a range of suitable NIR materials for autonomous vehicle LiDAR including N-BK7 or equivalent, sapphire, quartz, UV fused silica, amongst others. SEE PDF Material::BK7, Quartz/UV fused silica, Sapphire, B270, PMMA Diameter::Up to 200mm dia +0, -0.02mm Thickness::+/- 0.2mm Flatness::< 1/2 wave over 90% aperture Surface quality::< 40-20 scratch/dig Parallelism::5 arcmin Coating::AR Coating @1532nm

Knight Optical can offer Cube Beamsplitters for use within the Scientific Industry. We supply a range of Cube Beamsplitters 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 the scientific industry for use as components within spectrophotometers and interferometer. For interferometry, beamsplitters are used to separate light into two beams to compare a reference against a sample. Cube beamsplitters offer some advantages over plate beamsplitters in that they don’t suffer from ghost images and are easier to mount. For more information read PDF… Material::N-BK7 (or equivalent), UV Fused Silica Wavelength Ranges::Visible (400-700nm), NIR (630-1100nm), Telecom (1050-1700nm) Dimensional Tolerances::+/- 0.3mm Parallelism::< 3 arcminutes Surface quality::<40-20 Scratch/Dig Coating::AR coatings for application bandwidth on external surfaces

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.

Germanium wafers are a semiconductor material & are for microelectronics - Germanium wafers are a semiconductor material & therefore are a smart choice for microelectronics. Due to its unique electric properties, it is widely used for sensors, solar cells and infrared optical applications. The wafers are also great for microelectronics as the space is limited and being available in 500μm or less it makes it perfect to achieve the high quality results required. It’s thermal conductivity makes it a good alternative to silicon. Our stock wafers are produced as thin as 500μm and provide exceptional surface quality. However, we can manufacture to a fully customised specification with a wafer thickness as little as 10 μm. Typical specifications of our germanium wafers are: 10mm – 150mm in diameter <500μm in thickness Doped and undoped Germanium

Binoculars and Periscopes invert an image to make an object appear closer. There are two types of prisms that can be used for binoculars: Porro and Roof Prisms. Porro prisms are used in a pair to create an optical path. The image would pass through the first prism and which then inverts the image, the second prism then flips the image, so it is making the distant object appear closer. Roof prisms work in a similar fashion however are one prism and this design performs in the same way. Used particularly for smaller compact spaces as there are aligned in one piece to its objective lenses. Knight Optical’s Porro and Roof Prisms are available from stock, manufactured from high quality BK-7 or equivalent. They are also available to custom specifications with our capabilities for the two types: •General Dimensions: 5mm to 300mm+ •Angular tolerance: <3arcseconds •Surface form: <1/10th wave @ 633nm •Surface quality: 10:5 •Coating options: AR or Mirror Read PDF for Info

Knight Optical offers a range of precision optical components for use in IPL (Intense Pulsed Light) applications. The most common usage of IPL systems are typically used as photo epilators.Custom Ceramic Reflectors are a key component for this application. The xenon flash lamp which are typically used emit light in 360 degrees. However utilising ceramic reflectors which are light reflectors with a U channel means that light which would normally be wasted i.e. shining backwards is now refocused down into the filters and light guides. Knight Optical provides ceramic reflectors which are typically moulded from alumina. This choice of material is down to its ability to withstand thermal stresses and high reflectivity values. For more information read PDF

We offer a Very Wide Range of Brands, please send me enquiry via liamm@merefields.com or enquires@merefields.com 

Knight Optical can offer Gas Cells for use within the Chemical Analysis. - Knight Optical can offer Gas Cells for use within the Chemical Analysis. We supply a range of Gas Cells 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 the chemical analysis industry. Gas cells are used in spectroscopy for identification of the contents of gases. The path length and window material are chosen for analysis of different concentrations and types of gas. Depending on the types of gases being analysed, the windows in a gas cell can be made from NaCl, KBr, CaF2, BaF2, or ZnSe and will be chosen depending on bandwidth, to meet the customer’s application. All our Gas Cells are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory Material:NaCl, KBr, CaF2, BaF2, ZnSe or stainless steel bodies Shape:Short Path, Long Path, Variable Path Dimensional Tolerances::+/- 0.1mm Parallelism::< 3 arcminutes Surface Quality: :<60-40 Scratch/Dig Transmitted Wavefront Error: :< 0.25 λ PV@ 633nm

WE STOCK A LOT OF HONEYWELL PRODUCTS  HONEYWELL RANGING FROM SENSORS , Potentiometers, SWITCHES, WIRE AND MORE.  Please send me an enquiry via liamm@merefields.com or enquires@merefields.com

Knight Optical also keep stock a UV & NIR range of sheet polarizers - Knight Optical offer a range of Stock Polarisers that can be used in the visible range for use with cameras/photography. Linear Polarisation can be split into P-Polarised (Light where the electric field is Parallel to the plane of incidence) and S-Polarised (Light where the electric field is Perpendicular to the plane of incidence) light, where a polariser can be used to eliminate one plane of polarisation. This is done to decrease ‘glare’ (reflections on the surface) when an image is being taken, and increase the contrast. This is used often with cameras to obtain ‘better’ image quality at the expense of an image that appears slightly darker. Knight Optical also keep stock a UV and NIR range of sheet polarisers, for use with cameras outside of the typical visible range. These Linear Polarisers are available with single-sheet transmissions in the range of 22-44% and also in a range of sizes. Read PDF for more information Material::N-BK7 or Equivalent Diameter Tolerance::+0.0/-0.25mm Length/Width Tolerance::±0.5mm (<100mm) ±1mm (100-400mm), nominal (>400mm) Axis direction: :±2°

Knight Optical can offer you stock and custom mirrors Plane Mirrors (general, λ/1 and λ/4 for use in Spectromters, in a range of materials such as BK7 or equivalent, Quartz, UV Fused Silica and many more. These are customisable to size and coating depending on what you are trying to achieve. 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. The mirrors help produce high quality signals and can be coated with a variety of coatings to ensure that the perfect quality image in the wavelength you require is achieved: Plane mirrors are used to transmit the signal from the light source to the receiver in the spectrometer, the higher the specifications of the mirror the better the signal for it to produce a better transmission or reflection curve that it relatively to the sample. For more information read PDF… Material::Soda lime float glass, white plate, 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 Flatness:: λ/4 for polished substrates Parallelism::<3 arcmin Coatings::• Enhanced aluminium 94%R for visible applications.

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)

Merefields Supply a very wide range of ELECTRIC FANS, Please send an email to liamm@merefields.com for a Quote. We have over 10 Million Lines of Components in our Supply!

Knight Optical can offer Hot Mirrors for use in Heat-Sensitive Systems. We supply a range of hot mirrors for a variety of applications – all individually QA checked and metrology tested for quality to ensure parts meet customers’ specs. What’s more, our Hot Mirrors are 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 working with Heat-Sensitive Systems. Hot Mirrors are designed to transmit visible wavelengths and to reflect heat, causing infrared wavelengths. Hot mirrors have a sharp cut-off between Infrared (IR) and visible because they have a dielectric coating that can be controlled for different AOIs (most commonly 0°). For systems that require heat shielding while still needing visibility, hot mirrors can be used. These can attenuate IR radiation and allow visible light, which permits your temperature-sensitive equipment to be visible. Material::Borosilicate Shape::Circular Mirror, Square Mirror Dimensional Tolerances::+/- 0.1mm Parallelism::< 5 arcminutes Surface Accuracy: :< 5(2) @ 633nm Surface quality::< 40-20 Scratch/Dig

CMOS sensors are used within commercial grade Digital SLR cameras as a replacement for the more expensive CCD. These CMOS sensors are extremely sensitive to IR light, which can lead to discolouration. IR cut filters are used to block the IR light, meaning that photographs are taken with life-like colours. Colour Glass Filters can be used in variations of Bandpass, Long pass and Short pass, depending on which wavelengths of light need to be blocked resulting in different key areas being more easily distinguished. Knight Optical offers Colour Glass and IR cut filters for such an application, with a wide range of band widths and cut on/off wavelengths. As above these are available as Bandpass, Long pass or Short pass filters and we can also offer customised filters with coatings specific to the wavelength of your choice. We hold a massive inventory of IR cut, Bandpass, Long Pass and Short Pass filters: Read PDF for more info…. Material::Colour Glass and Borosilicate/D263T or equivalent Diameter::+0.0 / -0.20 mm Length/width::± 0.20 mm Thickness: :± 0.20 mm Surface quality::<60-40 scratch/dig or <20:10 for HD cameras Parallelism::<3 arcmin

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

WE STOCK LOADS OF LITTLEFUSE PARTS. OUR RANGE IS FUSES, SENSORS, RELAYS AND SEMICONDUCTORS / DISCRETES. Please send me an enquiry via liamm@merefields.com or enquires@merefields.com

Wire Belt Company’s Cordweave belts offer an extremely close and flat mesh for applications where very small items are being conveyed. Cordweave also provides a uniform heat transfer across the belt due to its high density and smooth carrying surface. These characteristics make Cordweave a popular choice in a wide variety of applications, ranging from biscuit baking to sorting small mechanical components.

WE OFFER A WIDE RANGE OF POWER SUPPLIES. WE ARE ABLE TO DESIGN THE POWER SUPPLY YOU NEED TO SPEC. SEND ME A SPEC SHEET/DRAWING OF WHAT YOU NEED AND I CAN QUOTE. ALTERNATIVELY, WE DO SUPPLY ALL THE MAIN BRANDED POWER SUPPLIES, XP, MEANWELL