Beam Expanders 10BE01 have two lenses and are focusable to minimal distance 2 m. In such type beam expander aberrations can be totally compensated only in one point. Depending on customer needs and application we can customize beam expander lenses to compensate aberrations in region of 2 m focus point or for infinity. Beam expanders could be customized for any wavelength from the range of 450-2000 nm.