Product description

   Germanium is the preferred lens and window material for high performance infrared imaging systems in the 8-12 um 

wavelength band. Its high refractive index makes Ge ideal for low power imaging systems because of minimum surface 

curvature. Chromatic aberration is small, often eliminating the need for correction.

   Germanium is most widely used for lenses and windows in IR systems operating in the 2 um - 12 um range. 

Its transmission is very temperature sensitive, becoming opaque near 100°C. Environment does not cause problems 

because Germanium is inert, mechanically rugged, and fairly hard.

   Germanium is also used extensively as a substrate for production of optical filters. Germanium covers the whole of the 8-14 micron 

thermal band and is used in lens systems for thermal imaging.

Note for Ge Window:

(1). Please specify the material and resistivity.

Custom-made Ge windows at any size are available.

Besides round, shape of quadrate, triangular, or other polygonal are available.

(2). Thickness from 1.0mm to 80.0 mm is available upon request.

(3). Better bevel is available upon request.

(4)Ge Windows with Anti-Reflective(AR), High-Reflective(HR), DHL coating are available.

Specification

Material: Germanium mono

Bevel:  <0.25mm X 45°

Coating: Optional

Typical Sizes:

Round Shape: Φ5.0; Φ10.0 ; Φ12.7; Φ15.0; Φ20.0;                 Diameter(mm): Φ25.4; Φ30.0; Φ38.1; Φ50.8; Φ76.2

Square Shape: 5.0x5.0 ; 10.0x10.0 ; 15.0x15.0 ;                      WxH(mm): 20.0x20.0; 25.0x25.0; 50.0x50.0

Thickness(mm): 0.5; 1.0; 1.5; 2.0; 3.0;           4.0; 5.0; 6.0; 8.0; 10.0