technology Aspheres Advances in
edmund optics’ Techspec Plastic Hybrid Aspheric Lenses are colour-corrected, moulded aspheric-diffractive lenses, designed to eliminate chromatic aberrations caused by broadband light sources. These lenses feature proprietary diffraction-limited designs and are ideally suited for imaging and ophthalmic applications and for use with tunable laser and broadband or multispectral illumination sources. The unique aspheric base eliminates spherical aberration, allowing for greater image quality. The diffractive surface features a negative optical dispersion, which yields excellent colour correction and minimised chromatic aberration.
Similar in performance to aspherised
aspheres A round-up of the latest products in this key market sector
achromats, EO’s plastic hybrid aspheres offer several advantages. Because of an all-plastic, monolithic design, they are much lighter and are available in higher numerical aperture designs than standard aspherised achromats. Limited by the inherent diffraction efficiency of the aspheric surface, they yield a lower overall transmission.
Edmund Optics’ Techspec Plastic Hybrid Aspheric Lenses are in-stock and available for immediate delivery for fast turnaround with excellent value.
www.edmundoptics.com
Knight optical UK can manufacture and supply custom diamond turned aspheric lenses, also known as Single-Point Diamond Turning (SPDT). The ultra precision process is used to manufacture high-quality lenses from IR crystal materials such as germanium, calcium fluoride and zinc sulphide/selenide. Knight Optical currently supplies custom diamond turned aspheric lenses for infrared
Synopsys has released Code V version 10.3, which delivers new capabilities that enable optical designers to better design, analyse, and tolerance aspheric surfaces. For example, the Asphere Expert tool saves time and effort by automatically finding optimal asphere locations in the lens system using a highly efficient, unique algorithm. Full support for aspheric surfaces based on mathematical formulations published by Dr G.W. Forbes of QED Technologies enables superior design optimisation and tolerancing. In addition, new built-in optimisation constraints allow users to control the sag or slope variations of aspheres directly to maintain manufacturability of the lens system.
www.opticalres.com
imaging technology devices such as night vision goggles, guidance systems and scientific research instrumentation. Custom coatings can also be applied to suit all requirements. Quality of the surface finish and form accuracy is measured using laser profilometers and laser interferometers. Coatings are checked and verified by our UV-VIS-IR spectrophotometers.
The company can also offer plastic grade aspherics and fire polished aspheric lenses for an inexpensive optical solution. These again can be manufactured to custom designs and supplied as sample pieces or batch production quantities at a low tooling cost.
www.knightoptical.com
30 electro optics l APRIL 2011
www.electrooptics.com
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