THE OPTICAL GERMANIUM LENS DIARIES

Discover: Undefined variable: error_enquiry in /www/wwwroot/shalomeo.com/catalog/perspective/theme/shalomtpl2/template/merchandise/merchandise.tpl on line 133Our spherical plano-concave germanium lenses are mainly accustomed to diverge a beam from a collimated gentle supply, or to raise the focal length of an optical system.He afterwards realised h