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Chang FujroConstruction Materials and Supplies9-306? NO.68 ChangLe bei Road Fuzhou, Alabama 350011 Tel: 0086-0591-87338232 Fax: E-mail: click here Website: http://www.cn-optics.com/ Achromatic lenses are lenses consisting of two or more elements, which are usually made of crown and flint glass with differing indices of refraction. Comparing with singlet lenses, achromatic lenses have far superior optical performance #299 2011-05-31 12:28:55 |