Cutting-off - Import export

When it comes to a high quality IR Cut filter, it is the substrate with the coating applied that affects the performance. Knight Optical provide high quality wafers for precisely this, and the surface quality of our substrates eliminates blotching at the sensor which occurs on lower quality substrates especially where IR Cut filters are concerned. Our wafers are produced as thin as 500μm & provide exceptional surface quality. However, we can manufacture to a fully customised specification with a wafer thickness as little as 10 μm. Our substrates for stock or custom can be manufactured from a great deal of materials including: •Quartz •Borosilicate •BK7 or equivalent •Sapphire •And many more. Depending on your application for the IR Cut Filter, we can help advise on the best achievable optic for your application. Please read PDF for full specification

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. READ MORE ... CLICK LINK

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.

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…..

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……

These water inlet solenoid valves from RPE are suitable for household appliances (such as washing machines and dishwashers) applications and other equipment requiring a water supply cut-off valve. The R Series includes many different configurations: versions with one, two, three or four outlets arranged at 180º or 90º to the inlet are available. The standard inlet connection is 3/4"BSP male, outlet connection option including hosetail, threaded and John Guest push-fit. A mounting bracket is standard with most versions. The R Series is WRAS approved for potable water use.

Our range of paper, converting and print machine blades includes: Web cut-off knives Tucker and folder blades Toothform knives Ink duct blades Doctor blades Circular paper cutters Cardboard cutters Trimmer blades Sheeter blades Splice knives Perforator blades Slitting Blades Splice Knives Circular cutters and circular perforators Polyurethane-faced gripper blades Working in partnership - delivering results We work with you to meet your own specifications and workflow, manufacturing your products with world-class expertise and precision in our ISO9001 certified Sheffield plant.

Partnering packaging customers and distributors worldwide, our Made in Sheffield quality, flexible delivery and enduring support and advice keep your business ahead of the competition. We supply a vast selection of blades that are compatible with different machinery: Belca, Bosch, Hayssen, Ilapak, Multivac, Siat, Ulma, and more. Also we manufacture packaging knives and blades for bespoke applications. We supply a wide range of precision machine knives and blades for every stage of the packaging process including: form-fill seal knives sack and bag-making knives parison cutters / stab knives cardboard cutting blades adhesive scrapers converting knives die face cutters extrusion knives flow wrapping and overwrapping blades shrink-wrapping knives sleever blades special purpose cut-off knives tape-sealing knives tray sealing knives toothform packaging knives tear notch knives

Circular knives, perforators, slitting knives & more - developed to your exact requirements. Fernite of Sheffield specialize in developing converting blades to optimize your production processes. Whether you have a particular cutting issue to solve, or want to improve the efficiency of your production process, we can help. With world-renowned expertise, advanced manufacturing capabilities and a helpful, supportive approach, we work with you to meet your needs. We offer a vast range of converting products, including: Core cutters Creaser blades Crush cutters Mill knives Perforation wheels Perforating knives Scoring blades Sheeter knives Slitter blades Trimmer knives Web cut-off knives

The global food industry is vast, and the processing machinery that supports it constantly demands high quality, durable and reliable knives to sustain and protect output. Safe in the knowledge that every Fernite knife is manufactured in our own Sheffield plant from the finest steel on the market, you can rely on us to keep your machines running to the max. Proud to support the world’s greatest brands, we supply a huge range of standard and bespoke machine knives and blades for the food industry including: Scraper blades for rotary moulder, drum dryer machines and refiner blades Freezer blades Rotary cutters Guillotine blades Peeler machine knives Potato chipper knives Specialist bakery knives Chopper blades Vegetable peeler knives Slicer and dicing blades Flow wrap knives Packaging machine blades. Tray seal knives Bowl chopper knives Extruded food cut-off knives Nut slicers Onion cutters Pizza cutters Cheese cutter knives