Techspec Germanium Meniscus Lenses

Edmund Optics introduces its Techspec Germanium Meniscus Lenses. The lenses feature a durable design that is suitable for use in a wide variety of demanding infrared (IR) applications, including IR imaging or surveillance, remote sensing or IR spectroscopy.

The lenses are manufactured from germanium, which is a rugged, durable material with a broad transmission range and a high index of refraction. Germanium has a transmission range of 2-16 μm and is opaque in the visible part of the spectrum, making it suitable for IR laser applications. The material is inert to air, water, alkalis and all acids, with the exception of nitric acid. With a density of 5.33 g/cm³ and a Knoop Hardness of 780, it is a suitable material for making rugged, durable IR optics.

The lenses feature a wavelength range of 2-16 μm. They are said to offer good spherical correction and smaller spot size than comparable lenses. They are available uncoated or anti-reflection (AR) coated for increased performance in the designated coating wavelength range. Eighteen different RoHS-compliant lens varieties are offered in 25 or 50 mm diameters and focal lengths from 25 to 100 mm, either uncoated or coated for the 3-5 or 8-12 μm wavelength range.