Light Weighted Mirrors

Light Weighted Mirrors

A light weighted mirror produced by Optical Surfaces Ltd.

Optical Surfaces Ltd has developed proprietary light weighting techniques that can reduce the weight of a mirror by as much as 60%.

In spaceborne applications the need to minimise payload is a key factor in designing optical systems. Optical Surfaces lightweight mirrors are designed to provide sufficient rigidity to ensure ultra-high precision optical performance while reducing the overall weight of the mirror. This reduced weight, in turn, allows smaller, lighter support and control structures, reducing the overall cost of optical systems such as space telescopes and spectrographs.

Light weighted mirrors also allow the creation of larger terrestrial telescopes and optical instruments than would be feasible with solid mirrors. Solid mirrors not only can be mechanically cumbersome, but are also difficult to cast and safely cool into a single, large block of optical glass.

Benefiting from a highly stable manufacturing environment and employing proprietary production techniques, Optical Surfaces highly experienced and skilled engineering team are world renowned for producing mirrors with unmatched surface accuracy, surface quality and surface slope errors. Working to strict ISO 9001-2015 guidelines all light weighted mirrors manufactured by Optical Surfaces Ltd are supplied with test data including high accuracy metrology, surface roughness and environmental data.

To discuss a light weighted mirror design to improve the performance of your telescope or optical instrument please contact Optical Surfaces Ltd. on +44-208-668-6126 or sales@optisurf.com.

Parabolic Mirrors for Optical Instruments

Parabolic Mirrors for Optical Instruments

An off-axis parabolic mirror produced by Optical Surfaces Ltd.

Optical Surfaces Ltd is a leading manufacturer of Off-Axis Parabolic Mirrors for optical instruments including radiometers, MTF measuring systems and spectrometers.

Off-axis parabolic (OAP) mirrors are the most common type of aspherical mirrors used in optical instruments because they are free from spherical aberrations, and can focus a parallel beam to a point or point source to infinity.

Employing off-axis parabolic mirrors in an instrument design allows optical engineers to not only minimise the size and weight of their system but also allows more interactive space around the focal point without disrupting the beam thereby increasing efficiency. OAP mirrors are especially suitable for broadband or multiple wavelength applications.

Benefiting from a uniquely stable manufacturing environment and employing proprietary production techniques, Optical Surfaces highly experienced and skilled engineering team are world renowned for producing off-axis parabolic mirrors with unmatched surface accuracy, surface quality and surface slope errors.

Optical Surfaces Ltd. has been producing top quality off-axis parabolic mirrors for more than 50 years and is widely accepted as one of the world’s leading manufacturers of these critical components for optical instruments.

Working to strict ISO 9001-2015 guidelines all off-axis parabolic mirrors manufactured by Optical Surfaces Ltd are supplied with test data including high accuracy metrology, surface roughness and environmental data.

To discuss an off-axis parabolic mirror design to improve the performance of your optical instrument please contact Optical Surfaces Ltd. on +44-208-668-6126 or sales@optisurf.com. For further information please visit www.optisurf.com/index.php/products/off-axis-paraboloids/

Optics and Optical Systems for Challenging Applications

Optical Surfaces Ltd is a leading manufacturer of high-precision optics and optical systems for challenging applications in areas including space research and high-power laser facilities investigating the frontiers of physics.

Broadband Collimator System

Motorised broadband collimator system now on-board the International Space Station

Using specialist production techniques, and benefiting from a uniquely stable manufacturing environment, Optical Surfaces highly experienced and skilled engineering team are renowned for producing ultra-smooth mirrors with unmatched surface accuracy, surface quality and surface slope errors.

Dr Aris Kouris of Optical Surfaces commented “Our pedigree in supplying state-of-the-art optics and optical systems for high power laser research is second to none. In recent years we have been selected by world leading high power laser research groups including AWE, ELI, LULI and CLF Rutherford as well as many academic centres of excellence to provide key mirrors and other related optics for a range of challenging applications”.

Hyperbolic mirror for deep space observation

Dr Kouris added “Producing high performance mirrors, lenses and spectrograph optics for space projects is something that we have done for many years. All optical components and systems to be used in space applications not only have to be lightweight but also have to meet certain key requirements to survive the harsh environment of space. They must be constructed of specific materials that will not outgas when exposed to the vacuum of space. All significant air spaces should be vented to avoid pressure on the elements and distortion of the lens. All materials right down to glues and greases must be approved and tested for outgassing”.

Very high precision focusing mirrors for the central laser facility at the Rutherford Appleton Laboratories (UK)

Optical Surfaces has been producing top quality optics for more than 50 years and is widely accepted as one of the world’s leading manufacturers of critical optical components and systems that are key to unlocking the secrets of the most challenging applications.

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.

In addition to producing precision optics and optical systems for challenging applications in high power laser physics and space research, Optical Surfaces Ltd also has considerable experience of supply for astronomical, healthcare, military and scientific research.

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

Ultra-Stable Mounts for Optics & Mirrors

Optical Surfaces Ltd offer a range of high precision mounts developed to support off-axis paraboloids, spheres and optical flats up to 600mm diameter in applications where stability is important.

Ultra-Stable Mounts for Optics & Mirrors

Constructed in black anodized aluminium – four models of OS Mounts provide a secure and stable platform for mirror diameters from 100mm (4 inches) to 254mm (10 inches). Angular alignment can be made about two axes by means of dual action adjusters with fine screw and ultra-fine differential micrometre 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 baseplate.

For larger optics and mirrors – OS 300-600 mounts are available in four standard sizes to accommodate high precision mirrors from 305 mm (12 inches) to 550 mm (21.6 inches) in diameter. Angular alignment of mounted mirrors is achieved about the vertical and horizontal axes using dual action adjusters with fine screw and ultra-fine differential micrometre action. Using these mounts, it is possible to rapidly align a large diameter mirror within a few arc seconds. Each OS 300-600 mount comes with adjustable feet to facilitate rapid and simple mounting onto an optical table. A range of additional motorised options are available for OS 300-600 series mounts to enable remote operation in hostile environments or for use in limited space applications where manual adjustment may be difficult.

For mirrors over 550mm diameter – Optical Surfaces has facility and experience of providing ultra-stable mounts for such systems.

For further information on ultra-stable mounts to support optics and mirrors please visit www.optisurf.com/index.php/products/product-6/mounts-and-mounted-optics/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

Environmental Monitoring from the International Space Station

Optical Surfaces Ltd. reports how a motorised UV-Vis-NIR collimator and interferometric alignment system it supplied to the Deutsches Zentrum für Luft- und Raumfahrt (DLR) in Berlin, Germany has been used to set-up the ground breaking DLR Earth Sensing Imaging Spectrometer (DESIS).

Environmental Monitoring from the International Space Station

On 23 October 2019, DLR the renowned German Aerospace Center, and the U.S. company Teledyne Brown Engineering (TBE) announced the start of routine operations for DESIS on the International Space Station. Operated by DLR and TBE, DESIS is the most powerful hyperspectral Earth observation instrument in orbit and addresses a wide range of applications. Its high-resolution image data will enable the development of measures for environmental protection and support the more efficient, ecological use of agricultural land.

The hyperspectral Earth observation instrument provides images with a one-of-a-kind level of quality. The sensor system collects image data in 235 closely spaced spectral bands from on board the International Space Station (ISS), at an altitude of 400 kilometres. It has a ground resolution of 30 metres and a spectral resolution of 2.55 nanometres. This significantly increases the depth of information available in Earth observation data. The first images were acquired shortly after initial setup and DESIS data has already been used to identify plastic islands and oil slicks at sea. A few months ago, the high spatial resolution of DESIS made it possible to detect rare Earth elements from space for the first time.

Broadband Collimator SystemIlse Sebastian, a Calibration Engineer at DLR commented “By installing the motorised UV-Vis-NIR collimator and interferometric alignment system in our class 100,000 clean room we have been able to undertake diffraction limited broadband imaging for MTF measurement, focusing and geometric calibration of single optics and focal planes, fully integrated camera systems and hyperspectral imaging systems such as DESIS. To monitor and verify that the UV-Vis-NIR collimator system is consistently in alignment – Optical Surfaces also designed and supplied a software-operated Laser Unequal Pathlength Interferometer (LUPI) system to interface with the collimator system”.

For further information relating to high precision optical systems for space and aeronautic research please contact Optical Surfaces Ltd on +44-208-668-6126 / sales@optisurf.com.

For further information relating to the Institute of Optical Sensor Systems at Deutsches Zentrum für Luft- und Raumfahrt (DLR) please visit https://www.dlr.de/os

Off-Axis Parabolic Mirrors for Imaging Applications

Optical Surfaces Ltd is a leading international manufacturer of Off-Axis Parabolic Mirrors (OAPs) for demanding imaging applications.

Off-axis parabolic mirrors can be a useful tool in optical design. OAPs combine the achromatic and diffraction limited imaging properties of a parabolic mirror with the ability to deviate the light path off-axis, which is useful for most imaging systems. OAP’s offer the ability to focus collimated light without introducing spherical aberration. Additionally, unlike a centred parabolic mirror, an OAP mirror advantageously allows more interactive space around the focal point without disrupting the beam. OAP mirrors are especially suitable for broadband or multiple wavelength applications.

Using proprietary production techniques, and benefiting from a uniquely stable manufacturing environment, Optical Surfaces highly experienced and skilled engineering team are world renowned for producing fast focusing OAP mirrors with unmatched surface accuracy, surface quality and surface slope errors.

Dr Aris Kouris of Optical Surfaces Ltd commented “In recent years we are honoured to have been selected by world leading high power laser research groups including AWE, ELI, LULI and CLF Rutherford as well as a growing number of academic centres of excellence to provide key OAP mirrors and other related optics for a range of demanding imaging applications”.

For further information on OAP mirrors for demanding imaging applications please visit www.optisurf.com/index.php/products/off-axis-paraboloids/ or contact Optical Surfaces Ltd. on +44-208-668-6126 / sales@optisurf.com

Demanding Telescope Spectrograph Optics

The Canada-France-Hawaii Telescope at dusk (courtesy: CFHT)

Benefiting from a unique facility, where temperatures remain constant year-round and vibration is practically non-existent, Optical Surfaces Ltd is able to routinely produce and test demanding telescope spectrograph optics (aspheres, flats, lenses, mirrors and prisms) that stretch the limits of conventional optical fabrication techniques.

Using a spectrograph, researchers are able to study the chemical and physical conditions that exist through a cross-section of space. Combined with a land or space-based telescope a spectrograph can reveal valuable information about the spectral distribution of light from a distant astronomical object.

Results from the SPIRou spectrograph at the Canada-France-Hawaii Telescope (courtesy: CFHT)

Benefitting from its highly experienced team of optical designers, engineers, and skilled production staff and its uniquely stable manufacturing facility – Optical Surfaces Ltd. has been chosen as a preferred supplier by many renowned international astronomy research groups. Notable projects completed by Optical Surfaces include SPIRou and ESPaDOnS spectrographs at the Canada-France-Hawaii telescope (CFHT), the Narval stellar spectropolarimeter on the 2m Bernard Lyot Telescope in the French Pyrenees, the High Resolution Optical Spectrograph (HROS) based on the 8m Gemini Telescope in Chile and the Fibre-fed Extended Range Optical Spectrograph (FEROS) at the European Southern Observatory (ESO).

As a leading international supplier of high precision optics for astronomical telescopes – Optical Surfaces maintains a range of interferometers that allows one-to-one testing of even the largest diameter spectrograph optics. Topographic and fringe analysis provides precise testing of surface roughness and confirms the wave front of various surface forms. Operating 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 telescope spectrograph optics from Optical Surfaces Ltd. is second to none.

For further information on high precision telescope spectrograph optics please contact Optical Surfaces Ltd. on telephone on +44-208-668-6126 / sales@optisurf.com. A selection of astronomical customer stories from around the world may be reviewed at www.optisurf.com/index.php/news/application-stories/.

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.

Return top
 
https://www.optisurf.com/wp-admin/theme-editor.php?file=footer.php&theme=piano-black