Общий каталог PRECITOOL - страница 634

Pictograms Text and icon pictograms for quicker selection Lens geometry Lens coating cera-tec® hard coating Aspherical lensAllows even for high magnificationa large lens diameter and thus a wide field of view.cera-tec®coatingThe extremely solid coating was developedtogether with the Fraunhofer Institute for SilicateResearch (ICS) especially for ourPXM® lenses. Itprotectsthe lenses all-round and gives the user safety and both visual and wearing comfort. Diffractive aspherical lens DUPLEX coating Has an additional diffractive structure Duplex The antistatic coating of the lens for correcting colour errors permanently prevents fogged-up lenses. Aplanatic lenses Super-They are characterized by their sphericalaberrationfree image with sharp outlines.DuplexSuper DUPLEX coatingDUPLEX with additional hard coating Achromatic lenses A combination of two lenses with Other different refractive power for correction of chromatic aberration Filter caps Meniscus/aspheric lenses for changing the colour temperature A combination of meniscus lens and aspherical lens. enclosed. This allows larger distances than comparable magnifi- cations of other lenses with edge-sharp image Biconvex lens Light bulb Single lens with two convex (outward curved), spherical lens surfaces. LED which is much more economical in consumption Plano-convex lens than conventional light bulbs with comparable A special shape of the converging lens with only brightness and has an one convex lens surface while the second surface is almost infinite life. planar. In the meniscus lens both surface radii (r1 und r2)have the same sign. Fluorescent lamp In converging menisci r1 is greater than r2 in divergent menisci r1 is smaller than r2. Eyeglasses are usually menisci. SMD-LED (SMD: Surface Mounted Device, LED: Light Emit- Lens material ting Diode) special, miniaturised LED with higher light output than conventional LED. PXM® light lenses The very light and break-resistant texture Step Up PXM® enables the manufacture of products that are charac- Electronic control system that builds the con- terized by the highest image quality, ergonomic designand optimised operating conditions.Step Upsumption voltage required by the LED and keepsit constant even when the battery voltage drops. The illuminance of the LED therefore does not drop over the battery life cycle. Silicate A melting product of quartz (binder), Silicate potash and soda (flux) as well as oxides (hardener). The glass melt, which has been dosed into pellets, is polished to lentils after cooling. Polyallyl diglycol carbonate (PADC) CR 39 is a polymer which is used, inter alia, for producingspectacle lenses and is also known under the desig- nation CR-39. Tri- Tri-acetate Acetat A synthetic fibre from the sphere of"natural polymers". PC Polycarbonate www.precitool.de 30/629