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  • TechSpec Germanium PCX Lenses
Apr 2011
Edmund Optics Inc.Request Info
BARRINGTON, N.J., April 28, 2011 — Edmund Optics Inc. has released TechSpec, germanium planoconvex (PCX) lenses that feature state-of-the-art precision diamond-turned surfaces. They are suitable for use in a variety of infrared applications, including thermal imaging, spectroscopy and remote sensing.

Germanium is a rugged, durable material with a broad transmission range from 2 to 16 µm and a high index of refraction. The material is opaque in the visible part of the spectrum and inert to air, water, alkalis and acids, except nitric acid. It has a density of 5.33 g/cm3 and a Knoop hardness of 780, nearly twice that of magnesium fluoride.

The lenses are available in 25- and 50-mm diameters. They are uncoated, feature a positive focal length ranging from 25 to 250 mm, and have one flat and one convex surface. They also are suitable for collimation and focusing applications using monochromatic illumination in defense and security.


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1. The process of aligning the optical axes of optical systems to the reference mechanical axes or surfaces of an instrument. 2. The adjustment of two or more optical axes with respect to each other. 3. The process by which a divergent beam of radiation or particles is converted into a parallel beam.
A crystalline semiconductor material that transmits in the infrared.
remote sensing
Technique that utilizes electromagnetic energy to detect and quantify information about an object that is not in contact with the sensing apparatus.
thermal imaging
The process of producing a visible two-dimensional image of a scene that is dependent on differences in thermal or infrared radiation from the scene reaching the aperture of the imaging device.
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