IR windows infrared transmitting optical windows focus on the infrared spectrum of light transmission around nir 700nm transmitting up to 12 microns.

Infrared windows are fabricated in a range of optical and crystal materials. Selection of the IR window depends on a variety of factors as each material reacts differently and more suited to particular regions of the infrared, see materials data.

Infrared IR optical windows include the following optical materials:

(IR) Infrared Grade Fused Quartz Windows

Infrared transmitting quartz polished optical windows and plates are used to transmit from 350nm to 3.50 microns in the infrared spectrum and are useful for their high temperature resistance and stability in demanding environments. IR quartz windows are custom fabricated and made to standard stock sizes. See materials page for data.

Optical Sapphire (random) Standard Grade IR Windows.

Sapphire polished windows and plates for infrared window applications transmit from the visible @750nm to the IR @ 5 microns. Sapphire is extremely hard and scratch resistant which is why it is a useful window in very hostile environments. It is used for its mechanical and infrared properties and is widely used as an (IR) infrared optical window custom made and to standard stock sizes. For material data see materials page.

Optical Silicon Windows

Silicon windows either floatzone or optical grade transmits in the infrared. Optical grade (monocrystaline or polycrystaline) silicon is mainly used for the 3-5 microns range. Floatzone silicon windows have higher transmission at 9 microns and 1% higher at 3-5 microns. Optical silicon windows are custom fabricated and made to standard stock sizes. For material data see materials page.

Germanium IR Windows Optical Grade

Germanium effective IR optical window operation ranges from 3-5 microns and 8-12 microns. Germanium is popular for its high refraction, strength and thermal conductivity, widely used in lasers and imaging systems. Germanium windows are custom made or to standard stock sizes. For material data see materials page.

Other IR infrared transmitting windows include IR grade Calcium Fluoride (Caf²), Zinc Selenide (ZnSe), Lithium Fluoride (Lif) and magnesium fluoride (magf²)