technology Aspheres


spanoptic offers precision polished aspheric lenses made from various materials such as glass, ceramics and quartz (fused silica). Latest CNC grinding and polishing equipment, including QED finish and sophisticated metrology, enable the company to manufacture concave and convex surfaces, even with turning points within a diameter range of 10 to 100mm. The attainable global shape accuracy can be less than 1µm with surface micro roughness below 1.5nm Ra (dependent on size and shape). Lenses can be supplied with or without AR (anti-reflection) coatings.


capabilities include Taylor-Hobson profilometer, sub-aperture stitching and white light interferometer. Having invested in a brand new in-house coating facility in 2010, Spanoptic can now manufacture high efficiency, very durable infrared coatings on request. www.spanoptic.com


lightpath technologies specialises in bringing high performance aspherical optical


Spanoptic also manufactures aspherical lens elements efficiently and accurately via single- point-diamond-tuning from Si, Ge, ZnS, ZnSe and GaAs. Combinations with spherical or plano surfaces including diffractive structures can be processed. Measurement and testing


designs and assemblies into volume production for biomedical, industrial, defence, and communication applications. LightPath Technologies has a list of aspheric designs with more than 60 standard designs. The standard Geltech molded aspheric lenses follow a 20-year history for design and production of moulded aspheric lenses. The company specialises in the rapid development of custom moulded glass aspheres for the best performance from a system. www.lightpath.com


reo offers a range of high-performance, diamond turned aspheric lenses fabricated from CaF2


lenses offer a combination of benefits for applications that require broadband or multispectral operation from visible through to infrared wavelengths, such as military rangefinding and target designation. These advantages include high surface accuracy (~λ/4 at 633nm) to achieve small focused spot sizes, low surface roughness (40-50Å rms) for minimal scatter and loss, and sophisticated, multi-layer thin film coatings. In particular, these coatings offer multispectral performance and high


laser damage threshold, and are produced using ion beam


, ZnSe and ZnS substrates. These


sputtering to yield a densified structure for exceptional environmental stability. The advantages can be maintained even with unusually thin lens profiles, meaning that the aspheres can deliver important weight advantages for man-portable, field and airborne applications. www.reoinc.com


World Record 100MHz trigger rate Visit us at


Near-Infrared Photon Counter for 1310nm - 1550nm


DSS booth 317 CLEO booth 1433


> Internal and external trigger up to 100MHz >


> Detection probability up to 25% > Gated and free running mode > Remote Control


ID Quantique SA info@idquantique.com www.idquantique.com


APRIL 2011 l electro optics 31


Adjustable delay, gate width, dead time, ...


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