Custom Beamsplitters

Optical Surfaces Ltd is a leading supplier of single to OEM quantities of high precision, custom beamsplitters to a growing number of spectroscopy, interferometry and imaging instrument manufacturers around the world.

The optimal beamsplitter can take on many forms including cubes, plates, hexagons, pentagons, polarizing, non-polarizing or wedge designs in a wide variety of reflection / transmission ratios and substrates depending upon your application.

custom beamsplitters

Drawing upon over 50-years’ experience – Optical Surfaces technical experts can advise you on the key beamsplitter parameters to consider including wavelength range, physical size, polarization and if used in an interferometer – pathlength and phase matching requirements.

Benefiting from a uniquely stable production environment and a highly skilled workforce – Optical Surfaces is able to produce custom beamsplitters that offer outstanding flatness and parallel specifications. Typically Optical Surfaces beamsplitters are manufactured to a surface accuracy of lambda/20 p-v at 633nm, a surface quality of 10/5 and microroughness of less than 1.2nm rms. Supplied mounted or unmounted, custom beamsplitters from Optical Surfaces can be enhanced with an extensive range of coatings designed to operate at your required angle of incidence.

For further information please visit www.optisurf.com/index.php/products/prisms-beamsplitters-filters-and-fibres/ or contact Optical Surfaces Ltd on +44-208-668-6126 / sales@optisurf.com.

Large Prisms for Demanding Spectroscopic Applications

Large Prisms for Demanding Spectroscopic Applications

Large, high quality prism

Optical Surfaces Ltd. is a leading manufacturer of large, high quality prisms for spectroscopic, surveying and telescope applications.

Prisms are solid optics that are ground and polished into geometrical and optically significant shapes where the angle, position, and number of surfaces help define the type and function.

Spectroscopic applications typically demand that prisms must be manufactured with very strict tolerances and accuracies. Due to the variability in shape, size and the number of surfaces, manufacturing of high-quality prisms requires considerable experience and skill.

For over 50 years – Optical Surfaces has supplied high quality uncoated and coated prisms for spectroscopic applications including image rotation, inversion, re-direction as well as to disperse light into its constituent colours.

Operating in a uniquely stable manufacturing environment – Optical Surfaces is able to produce all types and configurations of prism (amici/roof, bi-Fresnel, corner cube retroreflectors, dove, equilateral, isosceles, penta, rhomboid and wedge) with market-leading tolerances.

Manufactured from high quality optical glasses, prisms are available as single components (up to 450mm) or as cemented units. Optical Surfaces production team routinely achieves angle accuracy of better than 2 arc seconds, surface accuracy of lambda/20 p-v, 10/5 surface quality and microroughness of less than 1.2nm rms on its prisms.

Drawing upon over 50 years’ experience, Optical Surfaces ISO 9001-2015 approved manufacturing facility is able to produce high quality prisms to customer supplied specifications in quantities ranging from prototypes, through batch runs to production quantities. Full test data is provided with every prism.

For further information please visit www.optisurf.com/index.php/products/prisms-beamsplitters-filters-and-fibres/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

Hyperbolic Mirrors for Deep Space Observation

Optical Surfaces Ltd. is a leading international manufacturer of hyperbolic mirrors for deep space observation telescopes and earth observation satellites.

Hyperbolic Mirrors for Deep Space ObservationA hyperbolic mirror is the optical component of choice for precisely and accurately focusing light in a telescope from one focal point to the other focal point.

Hyperbolic mirrors are used in a telescope design to correct certain distortions caused by an extremely fast f-ratio design. A hyperbolic secondary mirror is used in Cassegrain telescopes to correct the spherical aberration caused by shorter focal length (smaller f/ratio) of the parabolic primary. In addition, in some more extreme low f/ratio (~f/3) applications served by Ritchey-Chretien telescopes, both primary and secondary are hyperbolic. For large deep space research telescopes, hyperbolic mirrors that correct fast optics are almost always necessary.

Optical Surfaces skilled craftsmen are able to draw upon a uniquely stable production environment to produce hyperbolic mirrors up to 500mm diameter with typical wave front error of lambda/20 P-V, surface finish of 10/5 and microroughness less than 1.2nm RMS.

These hyperbolic mirrors can be supplied mounted or mounted and with a coating exactly optimised for your application. In space borne telescope platforms, where weight is an issue, Optical Surfaces can produce hyperbolic mirrors with light-weighting options.

Optical Surfaces Ltd has been producing optical components and systems for astronomical and space research for more than 50 years. The company’s ISO 9001-2015 approved manufacturing workshops and test facilities are deep underground in a series of tunnels excavated in solid chalk where temperature remains constant and vibration is practically non-existent. With such stable conditions testing, particularly with long path lengths, becomes quantifiable and reliable.

For further information relating to hyperbolic mirrors please visit www.optisurf.com/index.php/products/conic-sections/hyperboloids/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Aspheric Optics for Nuclear Research Laser Facilities

Optical Surfaces Ltd. is an international supplier of diffraction-limited aspheric lenses for nuclear research laser facilities.

Aspheric Optics for Nuclear Research Laser Facilities

A large diameter diffraction-limited aspheric lens

Nuclear research laser facilities around the world today commonly use powerful amplified ultra-short duration pulses of coherent light to deliver massive energy densities at a given target. The synchronised delivery of such high-power pulses generates extreme conditions that allow scientists to carry out state of the art nuclear research and to study the conditions that exist in exotic and distant to us environments, such as the core of our sun. Using such facilities, researchers around the world are seeking to advance knowledge in fields such as particle and nuclear physics, material science, astrophysics with applications that range from nuclear energy to medical research. However, to push back the frontiers of these nuclear research applications places great demands on the quality of optics used to deliver and focus the energy of the high energy lasers onto their targets.

Over the last 40 years – Optical Surfaces has produced diffraction-limited aspheric lenses, up to 600mm in diameter, in a range of high-quality optical glasses with low f-number to optimise light gathering and focusing performance. Drawing upon a highly skilled workforce, proprietary production techniques and a uniquely stable manufacturing environment – Optical Surfaces is able to manufacture aspheric lenses with surface finish of 20/10 scratch/dig, surface roughness of 1nm rms and ultra-smooth slope errors.

These leading-edge specifications, coupled with a range of high-power laser coatings to maintain high transmission, has enabled Optical Surfaces aspheric lenses to operate at the ultra-high energy thresholds demanded by the latest generation of Terawatt lasers.

A rolling program for the calibration of test optics to national standards, where possible, and production approval to ISO 9001-2015 ensures that the quality of aspheric lenses from Optical Surfaces is second to none.

For further information on diffraction-limited aspheric lenses for nuclear research laser facilities please contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Precision Lenses Enable Ground-breaking Synchrotron Measurements

Using ultra smooth transmission optics supplied by Optical Surfaces Ltd, the MAX IV Laboratory has managed to achieve measurement of the smallest ever electron beam emittance on their state-of-the-art 3 GeV synchrotron storage ring.

3 GeV Storage Ring

The MAX IV Laboratory is Sweden’s internationally renowned national synchrotron radiation facility. Hosted at Lund University, it operates the world´s first fourth-generation storage ring, which uses a multi-bend achromat lattice and innovative accelerator engineering solutions to deliver unprecedented photon beam brightness for research in a wide variety of scientific fields.

Piano Convex LensÅke Andersson and Jonas Breunlin, researchers in the accelerator development group at the MAX IV Laboratory say “Since our 3 GeV storage ring was designed to store an electron beam of so far unprecedented transverse small dimensions and angular spreads, so-called emittance, two diagnostic beam lines were made available for observing and measuring these properties of the electron beam. Our beamlines use a much longer wavelength (visible to middle UV) region within the synchrotron radiation span than is normally used in other beamlines. Consequently, we base our measurements on the Kirchoff’s diffraction theory adapted to the synchrotron radiation emission and focusing. In this way we may use a relatively (compared to X-ray optics) simple optical set-up based on transmission optics. However, to do this we needed very high-quality surface accuracies on our optical components, in order to ensure that the radiation diffraction properties are not hidden by surface roughness or inaccuracies”.

Dr Andersson added “We selected Optical Surfaces Ltd to supply the critical high precision Plano convex lenses at the heart of our beam focusing set-up because of their extensive experience of supply critical optics to synchrotron facilities around the world and excellent technical support. We found Optical Surfaces very helpful in helping us make key decisions, such as choosing plano-convex instead of bi-convex lenses and choosing the optimum optical material offering best transmission down to 200nm. In addition, they were able to advise us small modifications to our design specification that would enable them to manufacture the lenses, three- and four-inch diameters, to our required surface accuracy of Lambda/20 (P-V) and transmitted wave form distortion around Lambda/15 (P-V). All-in-all our experience of working with Optical Surfaces on this project was very good. Accelerator science results from our 3 GeV storage ring, based on the diagnostic beam lines will be presented at the International Particle Accelerator Conference (IPAC 2019) now in May”.

Dr Aris Kouris, Sales Manager at Optical Surfaces Ltd. commented “We were very pleased to be approached by the MAX IV laboratory to discuss the optical requirements of their demanding synchrotron beam line project. This allowed us to exactly understand their needs and deliver the ultra-high quality plano-convex lenses their ground-breaking work needed”.

Optical Surfaces Ltd. has been producing optical components, mounted optical components and systems for more than 50 years and is now accepted as one of the world’s leading manufacturers of large high-precision optics and optical systems for synchrotron research. The company’s ISO 9001-2008 approved manufacturing workshops and test facilities are deep underground in a series of tunnels excavated in solid chalk where temperature remains constant and vibration is practically non-existent. With such stable conditions, testing, particularly with long path lengths, becomes quantifiable and reliable. Working with these natural advantages is a highly skilled team of craftsmen with a commitment to excellence in both product quality and customer service.

For further information on high precision optics for synchrotron research please visit www.optisurf.com or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Mounted or Unmounted Spherical Mirrors

Optical Surfaces Ltd. is a leading international manufacturer of high precision spherical mirrors with radii (Rc) from 25 to 5000mm (1 to 200 inches) for use in UV-Visible and Infrared applications including Schlieren imaging, wind tunnels, observatory spectrographs, bubble chambers and as hindle spheres to test hyperboloids.

Over the last 50+ years, Optical Surfaces has produced concave and convex spherical mirrors with diameters up to 1.3 metres (511 inches) in a wide range of materials and coatings for leading research establishments and organisations worldwide

High Precision Mirrors  Spherical Mirrors  

With workshops and test facilities deep underground where temperatures remain constant and vibration is practically non-existent Optical Surfaces routinely produces spherical mirrors of unmatched quality. Typical achievable surface accuracy is better than lambda/30 p-v, surface quality 10:5 scratch dig and micro roughness less than 1.2nm RMS. These same unique production facilities allow Optical Surfaces to manufacture and test very long radii spherical mirrors by taking full advantage of the long tunnels they have at their disposal.

For applications where stability is critical, Optical Surfaces can also supply its high-quality OS Series mounts to provide a secure platform for your spherical mirrors. Angular alignment of mounted mirrors is achieved about the vertical and horizontal axes using dual action adjusters with fine screw and ultra-fine differential micrometer action. Using these mounts, it is possible to rapidly align a large diameter mirror within a few arc seconds. A range of additional motorised options are available for OS Series mounts to enable remote operation in hostile environments or for use in limited space applications where manual adjustment may be difficult.

Optical Surfaces ISO 9001-2000 approved manufacturing facility provides the flexible resources to supply from single specialist requirements to OEM quantities. Benefiting from its stable environment, quality testing becomes quantifiable and reliable. All spherical mirrors are provided with a complete quality test assurance report.

For further information on high precision spherical mirrors please contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Astronomical Research Drives Improvements in Optical Technology

Optical Surfaces Ltd. has published an article ‘Unveiling the Cosmos’ that discusses the latest challenges and trends in modern astronomy and describes how these advances have acted as a significant driver towards the improvement of their optical technologies.

Optical Technology

Using new high homogeneity optical materials and improved polishing compounds has enabled Optical Surfaces to make further improvements in their manufacturing of large space optics with very tight manufacturing tolerances. Combining this with the latest coating technologies the company is now able to deliver optical components with improved reflective / anti-reflective performance and enhanced environmental stability, protection and durability.

Over the last 50+ years, Optical Surfaces has established itself as is a leading designer and supplier of high precision astronomical optics operating over the entire spectral range from infrared to x-ray wavelengths.

Telescope primary mirrorBenefiting from operating in a unique production environment, free from vibration and temperature variation, Optical Surfaces Ltd is able to regularly produce high precision aspheric optics, ultra-smooth mirrors, high performance prisms, Schmidt camera and Laser launch telescope optics which stretch the limits of conventional optical fabrication techniques.

To certify the surface accuracy and precision of its astronomical optics, Optical Surfaces uses large aperture Zygo GPI, Twyman Green, Scatterplate, Fizeau and Laser Unequal Path (LUPI) interferometers which enables one-to-one testing of even the largest diameter astronomical optics. Topographic and fringe analysis provides precise testing of surface roughness and confirms the wavefront of various surface forms. A rolling program for calibration of test optics where possible to national standards and production approval to ISO 9001-2015 ensures that the quality of astronomical optics from Optical Surfaces is second to none.

To read the technical article in full please visit https://www.optisurf.com/index.php/unveiling-the-cosmos/. For further information on high precision astronomical optics please contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Precision Windows for High Power Laser Experiments

High Precision Laser Windows

Large, high precision laser window

Benefiting from an ultra-stable production environment and proprietary polishing techniques – Optical Surfaces Ltd. is able to routinely produce high-power laser windows up to 600mm in diameter with typical wavefront error of lambda/10 and surface finish of 40/20 to 10/5.

Working with a range of optical materials including BK-7 and fused silica, which offer good homogeneity and transmission from the UV to the Near-IR, Optical Surfaces is today a preferred supplier of large, precision windows to many high-power laser research groups around the world.

To optimise the performance of rapid-pulsed (femtosecond) high-power lasers – Optical Surfaces Ltd is able to supply the latest dielectric coatings on windows to provide minimum pulse distortion, maximum usable bandwidth and durability.

Large High Precision Laser Windows

Large, high precision laser window

In applications where there is significant risk of mobile material as a result of high-power laser ablation – Optical Surfaces also has considerable experience of producing large ultra-flexible windows (debris shields) to protect the final high precision lens that focuses laser energy onto the targets. Manufacturing debris shields combines the dual demands of producing a precision wavefront (typically lambda/5 to lambda/10) on a flexible window with a high diameter to thickness ratio.

For further information please visit https://www.optisurf.com/index.php/products/flats-and-windows/windows/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Illustrated Guide to Aligning Off-Axis Paraboloids

Off-Axis Paraboloid Alignment ProcedureOptical Surfaces Ltd. announces that it produced an updated version of its popular ‘Practical Guide to Off-Axis Paraboloid Alignment Procedures’.

Off-axis paraboloids, also referred to as off-axis parabolic mirrors, provide the advantage of an unhindered aperture and access to the focal plane. They are ideal for broadband or multiple wavelength applications, thanks to their complete achromatic performance. Off-axis paraboloids often deliver the most cost-effective solution without compromising performance to many problems faced by optical and system designers.

With decades of manufacturing and supplying ultra-high precision off-axis parabolic mirrors to leading research groups around the world – the guide provides highly informed hints and tips to enable users to get top performance from their optics.

The illustrated alignment guide includes an introduction to OAP geometry as well as step-by step instructions on initial alignment; tips to correct for errors in focus and tilt, set off-axis distance and rotation and a final alignment procedure to ensure optimised performance.

For a copy of the 2018/2019 edition of ‘Practical Guide to OAP Alignment’ please visit www.optisurf.com/index.php/news/technical-tips/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Next Generation Ellipsoidal Mirrors for X-Ray Diffraction

Optical Surfaces Ltd. is offering high-precision ellipsoidal mirrors that offer unmatched pinpoint focusing for high resolution spectroscopy in the soft and hard X-ray regions.

Ellipsoidal Mirrors

Ellipsoidal mirror for an XRD application

Drawing upon skilled craftsmen working in a uniquely stable production environment, Optical Surfaces is able to produce ultra-smooth ellipsoidal mirrors able to deliver an X-Ray Diffraction (XRD) spot that exactly matches your spectrometer detector resolution. As a consequence, the resolution and angular range of XRD measurements can simultaneously be improved. In addition, the pinpoint focusing provided by the ellipsoidal mirrors increases X-ray flux density, resulting in better contrast.

With workshops and test facilities deep underground where temperatures remain constant and vibration is practically non-existent, Optical Surfaces routinely produces ellipsoidal mirrors in a range of materials (Zerodur, BK7, fused silica) with typical surface accuracy of better than lambda/10 (dependent on size and radius) and surface quality of 20:10 scratch dig.

Optical Surfaces can produce ellipsoidal mirrors in a range of shapes (largest dimension up to 400mm) that offer high performance and durable optical coatings that provide excellent image quality.

For further information on high precision ellipsoidal mirrors for X-Ray Diffraction please visit https://www.optisurf.com/index.php/products/conic-sections/ellipsoids/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

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