Fresnellight

Potassium dihydrogen phosphate (KH2PO4, KDP) and potassium dideuterium phosphate (KD2PO4, DKDP) crystals are one of the oldest used nonlinear materials. DKDP and KDP are known as analogs, though their properties differ due to DKDP deuteration. They both exhibit excellent ultraviolet transmission and high damage threshold. The nonlinearity of these crystals is relatively low, these crystals can be grown in large size. They found their application as nonlinear frequency doublers, triplers, and quandruplers of Nd-doped lasers and as Q-switch devices for Ti:Sapphire, Alexandrite, Nd-doped lasers. The main drawback is that these crystals are highly hygroscopic, therefore sealed housing and dry operating conditions have to be ensured.

Magnifying lenses

This ultra-thin sheet magnifier is no thicker than a few sheets of A4 paper but is incredibly strong, and virtually impossible to break. As well as being a helpful reading device in the office, or at home, it’s often found in areas requiring shared public use, like banks, libraries, museums, hospitals and care homes. Being made from just a single piece of plastic, it’s easy to keep clean too. Simply give it a light wipe with a damp soapy cloth to remove dust or finger marks.

Fresnel lens

Business Hours: Mon-Fri 9:00 – 17:30(as an online business we can usually respond by email at additional times, including weekends)

Large, lightweight fresnel lens magnifier sheet for viewing documents up to A4 size. Actual lens area is 263 x 198mm/10¼ x 8″ approximately, 2x magnification. Made from flexible 0.35mm hard-wearing clear PVC. So thin it can be kept inside larger-format books, filing cabinets, catalogues or drawers so a magnifying aid is conveniently close to hand.