technology products lenses and optics


Multi-wavelength optics for rangefinders


REO has introduced a new range of optics that offer high performance, multi-wavelength operation for military target designation


and rangefinding applications. Specifically, these components deliver a unique combination of high reflectivity or transmission at multiple wavelength bands (e.g. 808nm, 1,064nm and 1,570nm) while also maintaining excellent wavefront quality (λ/10 @ 633nm) in the reflected beam. These optics can also accommodate high


reflection or high transmission properties in the 3μm to 5μm spectral band, enabling common aperture FLIR applications. Just as important, they provide high laser damage threshold (typically ›40 J/cm² for a 20ns pulse at 1,064nm) and exhibit exceptional environmental stability. This performance benchmark is difficult to


achieve, because multi-wavelength coatings of this type are often physically thick. This makes it challenging to keep film absorption and defects below acceptable limits, and to control layer stress which may lead to wavefront issues. However, REO utilises a range of fabrication and coating technologies, including advanced plasma source (APS) and ion beam sputtering (IBS) coating to enable the necessary level of control over coating structure, stoichiometry and stress. These optics can be fabricated on a wide range , ZnS,


of substrates, including fused silica, CaF2


ZnSe, Si and sapphire, in sizes ranging from 0.5 to 12 inches. Plano, spherical and aspheric surfaces can all be produced, as can non-circular and non- rectangular geometries, including substrates with through holes. www.reoinc.com


ir achromatic lenses


performance over their full spectral range. The lenses are colour corrected for 3-5μm (mid-IR) or 8-12μm (long-IR) and are available in 30mm diameter with focal lengths of 40, 50, 60 and 75 mm. The precision optical grade crystalline lenses are air-spaced and aligned within an anodised aluminium barrel. All lenses are coated for maximum energy throughput over their specified spectral region. The lenses are well suited to applications in


Edmund Optics has introduced its new Techspec line of infrared achromatic lenses, designed to provide near diffraction-limited focusing


super broadband, high energy polarisers


184x85mm_World.qx7:Electro Optics 22/5/08 16:50 Page 1


Precision Photonics Corporation (PPC), a provider of ultra-precise optics and optomechanical assemblies, has launched a new line of super broadband, high energy polarisers for visible to near-IR applications. The company use advanced ion-beam-sputtering (IBS) coatings and epoxy-free bonding techniques to provide low-loss optical components that are thermally stable and suitable for high power Nd:YAG and fibre laser


FTIR spectroscopy, thermal imaging and for use with tunable QCL and other infrared lasers. The new lenses offer significantly improved performance when compared to traditional singlets, allowing designers in industrial, medical, scientific and military applications to utilise the entire dynamic range and full quantum efficiency of their infrared sensors for an impressive array of diverse OEM and laboratory uses. www.edmundoptics.com


applications, in which fluences can be greater than 500 mJ/cm2


and calcite or cemented


cube polarisers cannot be used. This super broadband polariser


maintains a greater than 500:1 extinction ratio throughout the entire visible to near-IR wavelength range (400-1,100nm) without sacrificing overall transmission (Tp ›92 per cent) or damage threshold (greater than 10J/cm2


). These fused silica beam


splitters are available with a standard 0.5 x 0.5-inch input face, and custom prism polariser assemblies will be available in sizes from 1mm to more than 25mm. www.precisionphotonics.com


Theworld leaders in laser safety


Quality laser safety equipment and compliance services based on over 100 years of collective experience.


Protection Products


Installations


UKAS Accredited Testing


Expert Advice & Training


Tel +44 (0)1202 770740 sales@lasermet.com www.lasermet.com 30 electro optics l MARCH 2011 www.electrooptics.com


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