Space Observation Optics Cover from IR to X-ray Wavelengths

Optical Surfaces Ltd is a leading designer and supplier of high precision, ground telescope and satellite-based space observation optics operating over the entire spectral range from infrared to x-ray wavelengths.

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Operating in a unique production environment, free from vibration and temperature variation, Optical Surfaces Ltd is able to regularly produce large, 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.

Investment in large aperture Zygo GPI, Twyman Green, Scatterplate, Fizeau and Laser Unequal Path (LUPI) interferometers allows one-to-one testing of even the largest diameter space observation 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 9001-2000 ensures that the quality of space observation optics from Optical Surfaces Ltd. is second to none.

Notable projects assisted by Optical Surfaces’ high precision optics include the UV Optical Telescope on the NASA Swift Explorer mission; the XMM Optical Monitor telescope for the European Space Agency (ESA); a Cassegrain camera for the NigeriaSat-2 satellite and the HROS Spectrograph for the 8m Gemini telescope (Chile). Visit www.optisurf.com/index.php/news/application-stories/ for details of these and other projects.

For further information on high precision space observation optics and optical systems please contact Optical Surfaces Ltd. on telephone on +44-208-668-6126 / email sales@optisurf.com.

Precision Interferometer Optics Help Push the Boundaries of High Resolution FT-IR

Optical Surfaces Ltd. has been selected by a leading spectrophotometer manufacturer to supply ultra high precision matched beamsplitter / compensator optics for the interferometer that lies at the heart of its High Resolution FT-IR system.

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To achieve this outstanding performance Optical Surfaces is manufacturing the 100mm diameter OA grade fused silica beamsplitter and compensator optics with a surface accuracy of lambda / 20 (p-v) and wavefront error in transmission of lambda / 20 (p-v) at 633nm. Further each beamsplitter / compensator pair is tightly matched in thickness and wedge angle.

Dr. Aris Kouris, sales and marketing manager at Optical Surfaces Ltd. commented “High resolution spectroscopy places great demands on being able to achieve leading edge specifications with the interferometer optics. Being selected to produce the optics at the heart of the FT-IR system was based upon our proven pedigree in reliably producing ultra high precision optics for a growing number of spectrometer and interferometer manufacturers”.

Optical Surfaces Ltd (www.optisurf.com) has been producing optical components and systems for more than 50 years and is now accepted as one of the world’s leading manufacturers of high-precision optical systems for spectroscopic and interferometric applications. 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 relating to high precision optics and optical systems for spectroscopy and interferometry please contact Optical Surfaces Ltd by telephone on +44-208-668-6126 or email < href="mailto:sales@optisurf.com">sales@optisurf.com.

Highly Stable Mirror Mounts Set New Benchmark for Mirror Control

Optical Surfaces has announced the new OS-Z range of mirror mounts.

gimbal-mirror-mounts-z-seriesOS-Z mirror mounts were developed to support off-axis paraboloid, spherical and flat mirrors in a manner that allows overcoming a number of constrains imposed by general purpose mounts. Two key advantages gained by using an OS-Z mount are rapid alignment using an optional pre-alignment aid and the ability to routinely accommodate wedge back and parallel back mirrors. In addition, in applications where long term stability and stress-free mounting are important, special factory fitted features allow this to be easily achieved.

Constructed in black anodized aluminium – six models of OS-Z mount provide a secure, stable and compact platform for mirror diameters ranging from 90mm to 250mm. Angular alignment can be made about two axes by means of dual action adjusters with fine screw and ultra-fine differential micrometer action. Using these mounts it is possible to rapidly align a mirror within a few arc seconds. To facilitate rapid and simple mounting onto an optical table or other support each mirror mount comes with a base plate.

As an option to the standard 2-axis gimbal micrometer-driven action, OS-Z mounts can be fitted with x-y-z linear stages if required. This addition allows the user to accurately control positioning of mirrors in up to 5-degrees of freedom.

For a technical data sheet describing these products in full please click here or contact Optical Surfaces Ltd. on +44-208-668-6126 or sales@optisurf.com.

Off-Axis Parabolic Mirrors

Off-Axis Parabolic MirrorsUnlike standard parabolic mirrors, Off-Axis Paraboloids (OAP) direct and focus incident collimated light at a specific angle, allowing unrestricted access to the focal point as well as reducing the size and minimising the weight of an optical design.

Working with the highest quality optical glasses – Optical Surfaces Ltd. produce standard OAP from 60mm to 600 mm in diameter. Benefiting from a uniquely stable manufacturing environment, and a highly skilled team of engineers and craftsmen, Optical Surfaces is able to routinely produce OAPs with surface accuracy to lambda/20 (peak-to-valley) depending upon off-axis angles. Using proprietary polishing techniques Optical Surfaces can, depending on the surface accuracy required, achieve the natural limit to the off-axis angle of around 25-30 degrees and surface micro-roughness of less than 1 nm. A range of coatings is available for standard and custom components from metallic with or without protective overcoat to multilayer dielectrics and ultra hard coatings.

Standard and custom design Off-axis Parabolic Mirrors from Optical Surfaces Ltd. have been chosen by many leading establishments around the world for undertaking applications including Schleiren, FLIR and MTF testing ; High power laser focusing ; Focusing upon astronomical objects ; Collimating reference wavefronts ; Beam expansion and Bore sight alignment for missile guidance systems.

Drawing upon over 50 years experience in producing high precision OAP mirrors – Optical Surfaces Ltd. has produced a handbook to enable users to get top performance from their optics. To download the handbook and product data sheet please click here. For further information please contact Optical Surfaces Ltd. on +44-208-668-6126 or sales@optisurf.com.

Universal Collimator for Testing Large Optics

Optical Surfaces Ltd, through its local distributor Jeewoo Photonics Ltd.**, has been selected to supply a mounted 600mm diameter off-axis parabolic mirror to the Samsung Thales R&D Center (Gyeonggi-do, South Korea).

optspr139-imageThe high precision (surface accuracy lambda / 20) off-axis parabolic mirror will be used by Samsung’s optical system design team as a universal collimator system for testing of large visible and IR optics being developed for use in the next generation of the company’s thermal imaging and electro optical systems.

MoonWhe Hur, product specialist at Jaewoo Photonics commented “Samsung sought a supplier with a proven track record in supplying affordable, large off-axis parabolic mirrors in an easy-to-use precision mount. With over 50 years experience and expertise in designing such systems – Optical Surfaces Ltd was the preferred supplier chosen by the optical system design team at Samsung”.

Samsung Thales is a leading company of high-tech optical industry in Korea with more than 30 years of experience, and also recognized by its technology in global markets. Samsung Thales has an extensive product portfolio from small optical system to large aperture camera, such as thermal imaging cameras, airborne camera for surveillance and ceconnaissance and large aperture satellite cameras. Samsung Thales has a facility to assemble and align large aperture optical systems, and collaborates with the professional subcontractors manufacturing large aperture mirrors and reference flat mirrors from 500 mm up to 2 m in diameter.

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 high-precision optics and optical systems. 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 please click here or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

** Further information: Jeewoo Photonics Ltd (Daejeon, South Korea) Tel: +82-42-337-5151 Email: mwhur@optictest.com

Large Diameter Reference Flats and Mirrors

Optical Surfaces is a well-established supplier of large, high precision reference flats and mirrors (coated flats) to research establishments, national standards laboratories and organisations worldwide.

Benefiting from a unique thermally stable manufacturing environment, and working with high-stability materials such as Pyrex, fused Quartz and Zerodur, Optical Surfaces is able to routinely achieve a surface accuracy of better than lambda/10 p.v. and surface roughness of less than 1nm on reference flats up to 600mm in diameter. A datasheet detailing standard specifications for these reference flats (diameter: 105mm – 600mm) may be downloaded from the Optical Surfaces website (www.optisurf.com/index.php/products/flats-and-windows/flats/)

Reference Mirrors and FlatsIn addition to its standard reference flats, Optical Surfaces offers special options for non-circular shaped flats, higher surface accuracy / quality, precision mounts, light-weighted options and an extensive range of coatings for demanding applications. All reference flats from Optical Surfaces Ltd. come with full quality testing assurance. Optics up to 450 mm diameter are provided with a Fizeau interferometric test report, larger flats are quality assured using the Ritchey-Common test procedure.

Reference flats are a proven method of measuring the surface accuracy or the transmitted wavefront of flat surfaces or optics. Applications where Optical Surfaces reference flats are used include astronomy, laser beam steering, inspecting gauge blocks for wear and accuracy and interferometric flatness testing of prisms, filters and optical windows.

For further information please click here or contact Optical Surfaces Ltd. on telephone +44-208-668-6126 or email sales@optisurf.com

High Throughput Achromatic Beam Expanders

Achromatic Beam ExpandersOptical Surfaces beam expanders incorporate off-axis mirrors which provide an unobstructed output and highly efficient transmission.

Beam expanders are the optical tool of choice for increasing the diameter of a collimated input beam to a larger collimated output beam. Beam expanders are used in applications such as, high power lasers, laser scanning, interferometry, LIDAR systems and remote sensing. OSL Beam Expanders are ideal for applications in which a small spot must be formed at some distance from the laser, or where the collimation range must be extended for illumination, or for alignment of distant objects.

Available in standard (5x, 10x, 15x and 20x fixed magnification) or customer specified (fixed or variable magnification) configurations – OSL beam expander are designed to be easy to use and to provide accurate, unobstructed expansion of any collimated input light source.

The reflective design of OSL beam expanders is achromatic and with aluminium coatings can operate from UV to far IR without adjustment. Optical Surfaces beam expanders are portable and can be used without the need for internal re-alignment.

Each OSL beam expander is supplied housed in aluminium housing with provision for fixing to an optical table. Alignment aids are provided to ensure correct beam pointing. Manufactured to better than lambda/5 surface accuracy, the off-axis design of OSL Beam Expanders produces no central obscuration and highly efficient transmission is obtained, unspoilt by spider diffraction patterns. An interferogram and OPD map is supplied with every beam expander manufactured by Optical Surfaces.

Optical Surfaces ISO 9001-2000 approved manufacturing facility provides the flexible resources to supply from single specialist requirements to OEM quantities.

For further information on standard or custom specified Beam Expanders click here or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

Ultra Smooth Mirrors for Demanding Applications

Optical Surfaces Ltd has been producing optical components and systems for more than 50 years and is acknowledged as one of the world’s leading manufacturers of ultra smooth parabolic, ellipsoidal, spherical and toroidal mirrors for the most demanding applications.

Leading edge applications that have benefited from the company’s ultra smooth off-axis parabolic mirrors include high power laser electron acceleration / beam focusing experiments, broadband collimators systems, satellite / ground based telescope research, remote sensing systems, interferometric beam expanders and MTF measurement systems. Ellipsoidal mirrors from Optical Surfaces are helping push the boundaries of telescopic solar research. High precision toroidal mirrors from Optical Surfaces are helping improve the achievable performance of mass spectrometers and opening up exciting new imaging applications in the medical field. A 1.3m diameter spherical spectrograph mirror was a key component that helped produce the first observable evidence of the existence of black holes.

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.

Optical Surfaces Ltd’s highly experienced and skilled team of engineers and craftsmen can typically produce off-axis parabolic mirrors up to 600 mm in diameter with surface accuracies to lambda/20p-v depending upon off-axis angles. With proprietary polishing techniques the company can, depending on the surface accuracy required, achieve the natural limit to the off-axis angle of around 25-30 degrees and surface micro-roughness of ~ 1 nm rms. Full details of achievable specifications for ultra smooth ellipsoidal, spherical and torroidal mirrors can be obtained from the product capabilities section on www.optisurf.com.

For further information or to discuss your application requirements please contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

Custom Optical Prisms

Optical Surfaces Ltd. manufacture high quality prisms to customer supplied specifications in quantities ranging from prototypes, through batch runs to production quantities.

Operating in a uniquely stable manufacturing environment – Optical Surfaces has experience of producing all types and configurations of prism (amici/roof, bi-Fresnal, corner cube retroreflectors, dove, equilateral, isoceles, penta, rhomboid and wedge) with market- leading tolerances. Available as single components (up to 450mm) or cemented units – Optical Surfaces 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.

Custom Optical PrismA prism is a transparent optical element with flat, polished surfaces that refract or re-direct light. At least two of the flat surfaces must have an angle between them. The exact angles between the surfaces depend on the application. Manufactured from a range of top quality optical glasses and available coated (AR, Reflective) or uncoated – Optical Surfaces prisms are the components of choice for applications including image rotation, inversion, re-direction and to disperse light into its consituent colours.

Drawing upon over 50 years experience – Optical Surfaces ISO 9001-2008 approved manufacturing facility provides full test data with every prism leading its facility.

For further information please click here or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com.

Practical Guide to Surface Quality

Surface Quality HandbookOptical Surfaces Ltd. (OSL) has produced its ‘Practical Guide to Surface Quality’ – the second in a series of practical guides for optics users.

The informative new 12-page guide is written to enable scientists and engineers better understand an optics quoted surface quality as surface imperfections are typically the most misunderstood, misinterpreted, and ambiguous of all optical specifications.

Key reasons why surface quality is an important consideration in selecting optics are associated with cosmetic acceptability and often more importantly with the functionality / performance of the component. The presence of defects on the surface of an optical component can scatter light which in some circumstances may affect its performance.

The OSL illustrated surface quality application guide includes an introduction to commonly used surface quality terms such as ‘scratch’ and ‘dig’ as well as providing definition of the MIL spec, ISO 10110 and DIN 3140 standards. Detailed information is provided on practical applications of the U.S military MIL spec and international ISO 10110 standards. Further a comparison is provided between these two standards to illustrate the different ways in which they describe surface quality in a consistent manner. Finally the guide details typical application for different quoted scratch/dig surface qualities from 80/50 (commercial grade optics, commonly acceptable standard for imaging applications) right through to 10/5 (High precision optics, used for the most demanding high power laser applications).

For a copy of the new ‘Practical Guide to Surface Quality’ please click here or contact Optical Surfaces Ltd. on telephone on +44-208-668-6126 or email sales@optisurf.com.

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