The 40570 Focusing Lens is used with the 77259 Focusing Lens Assembly. It is a 1.5 inch (38.1 mm) diameter, Borosilicate Crown Glass, Plano-convex Lens with a 150 mm Focal Length. Plano Convex lenses are for collimated beams or high magnification. 330 to 2200 nm wavelength range.

40570聚焦透镜与77259聚焦透镜组件一起使用。它直径1.5英寸(38.1毫米),硼硅酸盐皇冠玻璃,平面镜,焦距150毫米。平凸透镜适用于准直光束或高倍放大。330 ~ 2200 nm波长范围。