Lens is low absorbing
II-VI Infrared's MP-5 low-absorbing lens provides absorption of less than 0.12 percent.
The lens features visible HeNe laser light transmission and reduced thermal lensing. The lens is coated with zinc selenide and available in 1.5 and 2.0 in. diameters. It ships in 14 standard replacement lens configurations. It also is available custom-configured in OEM quantities.