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Knight Optical’s Polarizers for Head-mounted Displays
Knight Optical offer a complete range of Stock Polarizers for a range of applications that could be used for Head-mounted Displays. Our stock polarisers cover wavebands <0.2 to >2µm, we can also supply custom polariser options made to your complete custom specifications.
A head-mounted display (abbreviated to HMD), is a display device worn on the head or part of a helmet that has a small display optic in front of one (monocular HMD) or both eyes (binocular HMD) and can be used in applications within gaming, aviation, engineering and medicine. There are also optical head-mounted display (OHMD) which is a wearable display that can reflect projected images and allows a user to see through it (often used in conjunction with a Beamsplitters). Using polarisers for HMD helps to align the light onto a plane and reduce the scatter of the light reaching the users eye. By filtering out unpolarised light a polariser can convert a beam of light of undefined or mixed polarisation into a beam of well-defined polarised light, thus reducing the reflections and glare of the image being viewed by the user, whilst at the same time increasing the colour saturation. In doing so this allows the user of the HMD to have a more defined image of what is being displayed inform of them.
READ MORE https://goo.gl/Q2bhSo
We can offer both linear sheet and circular polarisers to suit your needs in the visible, UV and IR ranges in many different formats such as HN32, HN38 and HN42 as well as high performance materials such as HN38S for visible use and our UV and IR range of HNP’B replacement material which is very efficient at 290nm.
We hold a large inventory of Polarisers for use with Head-Mounted Displays.
· We stock large sheets up to 1270x480mm in some cases; we can cut these into special shapes at short notice.
· Mounting options are also available.
· Special Glass laminating to CAB polarisers
· Special AR coatings.
Typical specs for our stock Polarisers (custom capabilities available upon request):
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°
Non- glare coatings available on our circular polarisers with the option of left or right handed polarisation. We can also offer acrylic or glass laminations.
All our Polarisers are fully inspected on their quality in our ISO 9001:2015 certified, state-of-the-art Metrology laboratory, with our Trioptics, Optispheric, Varian and Starrett AV300. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.
READ MORE https://goo.gl/Q2bhSo
Contact our technical sales team to discover how Knight Optical’s high quality N-BK7 Windows and superior service can improve your instrumentation and supply chain experience.
· UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
· USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
· View our QA and metrology information
· Watch our Corporate Video
· View Our Corporate Brochure
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Knight Optical’s renewal of certification in ISO 9001:2015
Knight Optical is pleased to announce that we have achieved the renewal of our certification in ISO 9001:2015 (from the 2008 certification) Quality Management, via a UKAS accredited certification body. We are very proud of this accomplishment, and the continuing challenging work and dedication of our staff.
ISO 9001:2015 Quality Management is a globally recognised standard which sets out the conditions for a quality management system (QMS). Its primary goal is for a company to improve customer satisfaction by defining the processes needed to meet the customer’s requirements.
Knight Optical endeavours on ‘bringing quality into focus’ for our customers, priding ourselves on the excellent quality and service that we provide. By updating this certification, Knight Optical continues to strengthen its position within the optical industry.
Throughout the certification process, Knight Optical has increased its efficiency and found improved ways of reporting and communicating, guaranteeing that the service we provide is of the highest standard.
The metrology laboratory at Knight Optical is just one of the many areas where this quality management system is implemented. Measurement traceability is paramount within this field to provide confidence to our customers of the validity of the measurements that we report.
Customer satisfaction drives our company, and we are always looking at ways to improve the customer experience.
With the ISO 9001:2015 certification, you can have confidence that the right processes are in place to make sure Knight Optical is always improving and always looking for new ways to satisfy our customers.
Read More https://goo.gl/zeL2Ls
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Knight Optical will be attending Photonics West 2018
January 30th sees the start of Photonics West 2018 at The Moscone Center, San Francisco, California.
Knight Optical will be attending the exhibition again, in the North Hall at Stand No. 5137, and we look forward to discussing with you how we can assist regarding your future precision optical component requirements, as well as welcoming our existing partners to our stand. Exhibitions are busy events so why not call or email us to find a convenient time to drop by and discuss your requirements?
Bringing quality into focus with 26 years’ experience in the global optics market. A leading provider of high quality metrology tested (UV-VIS-IR) custom precision optical components. Our technical advisors are here to support your needs, we consider ourselves part of your team. We are ISO 9001:2015 UKAS certified, with over 3000 stock components available for fast delivery. Discover how Knight Optical’s high quality optics and service can improve your instrumentation and supply chain experience.
Visit us at Photonics West, 30 January – 1 February 2018 at The Moscone Center, San Francisco, California, United States, North Hall, Stand No. 5137
Knight Optical (UK) Ltd
Unit 4 Roebuck Business Park
Ashford Road
Harrietsham
Kent ME17 1AB
[email protected]
Telephone: +44 (0)1622 859 444
Fax: +44 (0)1622 859 555
Knight Optical (USA) LLC
1130 Ten Rod Road
Suite D102
North Kingstown
Rhode Island 02852
[email protected]
Telephone: (001)401-583-7846
Fax: (001) 401-583-7851
Read More https://goo.gl/4CbWqk
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Knight Optical’s Germanium Windows for Thermal IR Spectroscopes
Are you in need of a method that can measure the thermal infrared radiation emitted from a surface? Why not see what Knight Optical can offer you.
Our Germanium windows are not only used in IR sensors, medical applications, and pyrometry; but also in Infrared Spectroscopy to measure the radiation emitting from the infrared part of the spectrum. 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.
We can also offer custom coatings for Germanium windows available on you request and to your specific requirement with diameters up to 300mm diameters.
Follow link to read more http://bit.ly/2izAOjW
Typical specs:
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)
Follow link to read more http://bit.ly/2izAOjW
Our Germanium optics are checked for quality in our state-of-the-art Metrology laboratory using equipment from Trioptics, Varian and Starret allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Dichroic Filters and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
· View our QA and metrology information
· Watch our Corporate Video
· View Our Corporate Brochure
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Injection Moulded Aspheric Lenses for Virtual Reality Headsets
Knight Optical’s injection moulded aspheric lenses can be found in Head Mounted Displays (HMDs) globally.
Virtual Reality headsets are typically know as HMDs consist of a pair of lenses which typically forms an image directly into the eyes of the wearer. The lenses shape and focus the picture for each eye thus creating a stereoscopic 3D image. This used in conjunction with an accelerometer in the system allows for an immersive experience, where the wearer can feel like they are part of another reality.
Optical aberration typically occur in common spherical singlet lenses which results in an image that appears distorted. Consequently HMD manufacturers have started to incorporate aspherical lenses which can replace multiple element systems. Aspheric lenses allows a single component lens to collimate or focus highly divergent rays, potentially replacing a multi-lens system.
Knight Optical offers injection moulded aspherics from a range of visible materials including PMMA, polycarbonate, polystyrene and Lexan. This makes for a quality, cost effective product which can be provided in high volumes.
Typical specs:
Material: PMMA, Polycarbonate, Polystyrene and Lexan
Diameter: Up to 100mm dia +0, -0.02mm
Surface Quality: < 80-50 scratch/dig
Coating: AR/AR 400-700nm Ravg <0.5%
Our Aspheric lenses are checked for quality in our state-of-the-art Metrology laboratory using equipment from Trioptics, Varian and Starret allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Moulded Aspherics and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
· View our QA and metrology information
· Watch our Corporate Video
· View Our Corporate Brochure
READ MORE http://bit.ly/2wU6Ehs
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Colour Glass Filters for CMOS sensors
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:
· Stock sizes of 5-50mm diameter or 5-50mm length/width and 1mm thick
· Custom shapes and sizes available
· Alternative thickness substrates available.
Typical specs:
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
Note:
Wavelength cut-on listed in table is transition cut-on wavelength (T=Tmax/2)
Wavelength cut-off listed in table is transition cut-off wavelength (T=Tmax/2)
Wavelength peak is centre wavelength (specific to Bandpass Filters)
All our Colour Glass Filters are checked for quality in our state-of-the-art Metrology laboratory using our Varian Cary 5000 spectrophotomer’s fitted with UMA, allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Colour Glass Filters and superior service can improve your instrumentation and supply chain experience.
Tel +44(0)1622 859444 | Email [email protected]
Tel +(001) 401 583 7846 | Email [email protected]
· View our QA and metrology information
· Watch our Corporate Video
· View Our Corporate Brochure
http://bit.ly/2yZQxjb
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Plane Mirrors for Laser Distance Measurements
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.
READ MORE bit.ly/2zl9RXd
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 measurement and the mirror at its current location which would be the target in question for ascertaining its distance.
Typical specs:
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
Flatness:
1.1mmthk: 1λ over 10mm dia.
3/6mmthk: 2λ over 25mm dia.
Parallelism: <3 arcmin
Options available:
· Edging of stock mirrors to smaller diameters.
· Stock mirrors can be machined to custom square or rectangular apertures or bespoke designs.
· Various mounting options.
· Larger 99% dielectric 145x100mm substrates are available from stock for custom larger sizes in 1mm, 3mm and 6mm thk.
· Larger 94% enhanced aluminium sheets are available from stock for custom sizes.
3mm and 6mm are available as1100x940mm, 1mm and 2mm are available as635x400mm sheets.
Mirror coatings:
UV applications:
Ali/MgF², R.avg>85%@180-650nm, AOI= 0°-45 °
Visible applications:
Enhanced Ali, R.avg>94%@450-650nm, AOI=0°-45°
All-Dielectric, R.avg>99%@450-700nm, AOI=0°-45°
NIR applications:
All-Dielectric, R.avg>98%@700-1064nm, AOI=0°-45°
Ion-Plated Silver, R.avg>96%@450-2000nm, AOI=0°-45°
NIR/ FIR applications:
Protected Gold, R.avg>97%@750-FAR IR, AOI=0°-45°
All our Flat Mirrors are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, our ZYGO interferometer and Radius Slide tests for the form error, irregularity and TWE on flat and spherical surfaces, and Starrett AV300 provides video imaging for non-contact testing on small dimensions. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Plane Mirrors and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
· View our QA and metrology information
· Watch our Corporate Video
READ MORE bit.ly/2zl9RXd
·
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Knight Optical announces increase in production capabilities of custom Glass & Moulded Polymer Aspheric Lenses for Weapon Sights
Custom Moulded Aspheric Lenses and polished BK7 lenses are use within Weapon sights.
Our aspheric lenses are used to correct optical aberrations (where the converging light from a lens does not have a common focal point, resulting in a distorted image) in laser focusing and imaging. Traditional spherical lenses cannot collimate light effectively and even smallest of angles of incidence can produce aberrations.
This can mean that several combined optical 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. Saving weight and space.
Therefore Aspheric Lenses that are moulded are ideal for use within Gun Sights, Military Scopes, Laser Holographics, and Laser Range finding applications.
For more information
For prototyping or smaller volumes. Diamond turned manufacturing of lenses is also available.
Knight Optical are an ISO 9001 UKAS certified company. All our Lenses are fully inspected on their quality in our state-of-the-art Metrology laboratory, using our Trioptics Optispheric, and Starrett AV300. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.
bit.ly/2yi5aAl
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Moulded Optics for UV Disinfection Systems
Knight Optical offers a range of precision optical components for use in UV Disinfection System applications. The most common usage of such systems is for water purification. This is harnessing specific wavelengths of a UV lamp which is then emitted and used as a germicide to cleanse water of pathogens such as e. coli, staphylococcus aureus and salmonella.
One such component are the quartz tubes which can be moulded or generated from a furnace. These tubes are typically used to house the UV lamps. This prevents the UV lamp from being exposed which in turn extends the longevity of the lamps and means that the lamps can be used under higher pressures. These lamps and tubes can also be used with UV eflectors which are light reflectors with a U channel or groove means that light which would normally be shined backwards is now harnessed in the correct direction.
Knight Optical provides tubes which are typically produced from quartz, borosilicate, float glass, Liba 2000, amongst other materials. This choice of material is down to its ability to withstand thermal stresses and those that can offer high transmission values.
All of Knight Optical’s tubes are custom produced, ensuring all products are bespoke and fully compliant to the customer’s requirements.
Typical specs:
Material: Quartz, borosilicate, float glass, Liba 2000
Dimensions: +/-0.25 mm
Surface quality: <60-40 scratch/dig
READ MORE http://bit.ly/2xvXdU8
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Knight Optical’s Fresnel Lenses for Retinal Imaging
Knight Optical can offer you Stock and Custom Fresnel Lenses, ( http://bit.ly/Frensallenses )for use within Retinal Imaging in a range of materials such as PMMA Acrylic and Borosilicate.
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 used for retinal imaging Fresnel lenses. The Fresnel lenses are used as part of a system where its multi-focal length provide a multiple in and out of focus image that provide a magnified image of the human eye itself.
This stock range of fresnel lenses range from 5mm to 650mm aperture and contains both standard and precision ranges of fresnel lenses. The precision range has tighter tolerances with improved surface quality. These ranges are uncoated however antireflective coatings can be applied at short notice.
Typical specs: Borosilicate
Material: PMMA Acrylic/
Center thickness: +/- 0.2mm
Clear aperture: Nominal
Focal length:
Standard range ± 5%
Precision range ± 2% typically (± 5% manufacturing data)
Design condition: Parallel light on grooved side
Options available:
Cutting down of stock lenses to custom sizes.
Antireflective coatings
Other focal lengths and aperture sizes available at short notice.
All our Fresnel Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Starrett AV300 video microscope for high accurate diameter testing. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Fresnel Lenses and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
View our QA and metrology information
Watch our Corporate Video
View Our Corporate Brochure
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Knight Optical’s metrology laboratory For full details follow this link bit.ly/2xpATz8
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Check out Knight Optical's metrology laboratory which equipped to test almost every precision optical specification & is staffed by a team of skilled and qualified technicians. The laboratory follows Knight Optical's ISO9001 for Quality Management Systems and the surveillence audits are undertaken by a UKAS accredited registrar. Our customers can be confident that all their optical solutions & parts are accurately tested and delivered to specification.
Out metrology laboratory has seen substantial investment in order to meet a broad range of testing requirements and assure high level of quality assurance.
For full details follow this link bit.ly/2xpATz8
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Increased sale team at Knight Optical
Knight Optical are pleased to announce that we have increased our multilingual Technical Sales Team both at our Europe & RoW office in the UK and in our U.S. Rhode Island Americas office in order to deal with increased demand and to provide our business partners with the highest standard of customer service you expect from Knight Optical.
Visit our website at https://www.knightoptical.com to see our range of over 3,000 stock optics available for next day global dispatch.
Contact our technical sales team to discover how Knight Optical’s precision optics and superior service can help you through the processes of realizing your custom precision optical components.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
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Knight Optical's Stock Barium fluoride windows
Barium Fluoride (BaF₂) is a crystalline compound of barium and fluoride used in optical applications in the NIR, VIS and MWIR spectrums. Barium Fluoride is resistant to high energy radiation, performing well in dry temperatures up to 800°C, but transmission in the Vacuum UV (VUV) degrades over time in a moist atmosphere and the material is susceptible to water corrosion at 500°C.
Barium Fluoride is ideal for use as a VUV window where high radiation resistance is required from, for example, gamma and x-ray. Other applications include thermography and medical thermology equipment, laser, and astronomy.
Barium Fluoride transmits at over 90% between the 0.2-10μm spectrum beyond which transmission decreases, reaching 0% at about 0.18µm and 14µm. It is a relatively soft material with a hardness of HK82, and can be BBAR coated for use in the 0.8-2.5µm, 3.0-5.0µm and 1.0-5.0 ranges.
Knight Optical supply a range of quality BaF₂ windows available between 13mm diameter to 38mm diameter direct from stock (or custom if required) . Our stock windows may be resized at short notice to fit customer's individual requirements.
Contact our multilingual technical sales team and discover how Knight Optical’s high quality Barium Fluoride windows and service can improve your instrumentation and supply chain experience
Material:
Barium Fluoride
Diameter:
Thickness:
+0, -0.2mm
± 0.2mm
Flatness:
< 2 waves over 90% aperture
Surface quality:
<60-40 scratch/dig
Parallelism:
5 arcmin
Note: Stectroscopic Standard Grade rectangular windows are sometimes cut from the same sized diameter, so may have curved edges as a result. These types also come in drilled (with 30mm spacing)/undrilled versions for use alone or as a pair.
Options available
Mounting into cells.
Edging down to smaller sizes.
Document/Drawing
Optical material Infrared Barium fluoride
Applications:
Barium Fluoride (BaF2) IR grid polarizers for molecular lasers
Barium Fluoride (BaF2) scintillator for detection of high energy particles
Barium Fluoride (BaF2) IR spectroscopy for fuel oil industry
Barium Fluoride (BaF2) optics for military systems
Please contact our multilingual technical sales team and discover how Knight Optical’s high quality optical components and sub-assemblies with superior service can improve your instrumentation and supply chain experience.
Tel +44(0)1622 859444 | Email [email protected]
Tel +(001) 401 583 7846 | Email [email protected]
View our QA and metrology information
Watch our Corporate Video
View Our Corporate Brochure
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Knight Optical's New Range of Stock IR Sapphire Spherical Lenses
Sapphire crystal (Al2O3) is an excellent substrate for a range of rugged applications.
It has high transmission from 150nm up to around 5µm therefore ideal for UV, Visible and IR applications. Sapphire lenses have excellent mechanical strength and hardness. With sapphire having superb thermal and chemical resistance and being scratch resistant, sapphire is a perfect choice for lens applications. Sapphire is inert and resistant to attack from most processing environments, such as hydrofluoric acid.
We supply a range of sapphire lens solutions and offer plano convex, biconvex and concave sapphire lens solutions. Our sapphire lenses can also be antireflective coated to increase efficiency in UV and IR applications. Sapphire grades we offer are Random, C-Cut, Z-Cut and fluorescence free sapphire.
Sapphire lenses can be found on probes that burrow deep under the earth’s surface and on aerospace and aeronautical vehicles where they are subject to impact by high speed debris. The scratch resistance of sapphire ensures a long life of durability for optical components.
Sapphire has a melting point over 2000°C with a high thermal conductivity makes it suitable for use in extremely hot environments such as furnaces, and high power laser applications, such as Er:YAG lasers.
Sapphire lenses are rare in the field of optical components, as most manufacturers only supply custom orders due to the high cost of sapphire. Knight Optical offers a range of stock sapphire lenses for your applications, and can also supply custom solutions to your individual specification. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure your requirements are met.
Material: Sapphire (Random grade)
Diameter: +0 / -0.10mm
Centring accuracy: < 5 arc min
Focal length: ± 2.0%
Centre thickness: ± 0.25mm
Surface quality: <60-40 scratch dig
Coating options : Extended broadband multilayer antireflective coating
<0.5%@450-900nm
All our Sapphire Spherical Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality Germanium Windows and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
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Diamond Turned Aspheric Lenses for Virtual Reality Headsets
Knight Optical’s Diamond turned aspheric lenses can be found in virtual reality systems globally.
Virtuality Reality headsets which are typically know as HMDs (head mounted displays) consist of a pair of lenses which typically forms an image directly into the eyes of the wearer. The lenses shape and focus the picture for each eye thus creating a stereoscopic 3D image
Optical aberration typically occur in common spherical singlet lenses which results in an image that appears distorted. Consequently HMD manufacturers have started to incorporate aspherical lenses which can replace multiple element systems. Aspheric lenses allows a single component lens to collimate or focus highly divergent rays, potentially replacing a multi-lens system.
Knight Optical offers diamond turned aspherics from a range of visible materials including Quartz, BK7, UV fused silica (UVFS), SF11, acrylic and plexiglass.
Typical specs:
Material: Quartz, BK7, UV fused silica (UVFS), SF11, acrylic and plexiglass.
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/AR 400-700nm Ravg <0.5%
Our Aspheric lenses are checked for quality in our state-of-the-art Metrology laboratory using equipment from Trioptics, Varian and Starret allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discover how Knight Optical’s high quality diamond turned aspherics and superior service can improve your instrumentation and supply chain experience.
UK, Europe, Asia & RoW: E-Mail [email protected] Tel +44 (0)1622 859444
USA & Canada: E-Mail [email protected] Tel +001 401-583-7846
View our QA and metrology information
Watch our Corporate Video
View Our Corporate Brochure
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Custom Domes for Protective Housing for CCTV Cameras
Knight Optical has successfully launched a range of Stock Optical Domes for protective housing for CCTV Camera Systems, where protection of electronic sensor systems from harsh liquid and gas environments is essential.
A dome is essentially a window that has two parallel curves faces. Our domes are high quality with good form error polished faces to ensure high clarity and transmission in the Visible and NIR spectrums allowing for accurate measurement.
Capabilities: Domes are readily mountable, optically clear and manufactured to a high standard. Available from 5mm to 200mm in diameter and 0.25 to 10mm in thickness offering high transmission and extreme toughness for harsh environments.
Typical materials: As well as fused silica, domes can be made in any of the additional materials:
BK7
PMMA Acrylic
Quartz
Sapphire
Germanium
Silicon
All our domes are checked for quality in our state-of-the-art Metrology laboratory using equipment from Trioptics, Varian and Starret allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.
Contact our technical sales team to discuss your requirements for optical domes, as well as our other components.
Tel +44(0)1622 859444 | Email [email protected]
Tel +(001) 401 583 7846 | Email [email protected]
View our QA and metrology information
Watch our Corporate Video
View Our Corporate Brochure
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