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Viewport Transmission Charts


Calcium Fluoride Transmission

Calcium Fluoride (CaF2) Optical Components are used as spectroscopic windows or lenses, or in cryogenically cooled thermal imaging systems. Calcium Fluoride (CaF2) Optics are ideal for a broad range of Ultraviolet (UV), Visible, or Infrared (IR) applications. Calcium Fluoride’s combination of low absorption with a high damage threshold makes it an excellent material for use with Excimer lasers. Calcium Fluoride (CaF2) features a low refractive index, removing the need for an anti-reflection coating.

Crystal Quartz Transmission Chart

Crystal Quartz Transmission

Crystal quartz is characterized by low stress birefringence and highest refractive index' homogeneity. Optical transmission of the material covers 0.15 – 4.35 μm range.


DUV Fused Silica Transmission

Deep Ultraviolet (DUV) Fused Silica viewport designs are available with diameters up to 8 inches and include zero length designs for low profile applications. These are all bakeable to 200˚C. Several standard grades of DUV Fused Silica windows are offered Several standard grades of Fused Silica windows are offered having excellent transmission from 193m to 2 microns

DUV Sapphire Transmission Chart

DUV Sapphire Transmission

Deep Ultraviolet (DUV) Sapphire viewports are required to withstand harsh environmental conditions and provide high levels of performance and reliability. High thermal stability and excellent thermal conductivity make sapphire windows suitable for applications in high power. The loss in a sapphire window is less than in other common optical windows.

Germanium Transmission Chart

Germanium Transmission Chart

Germanium (Ge) Windows has a broad transmission range and opacity in the visible portion of the spectrum, germanium is well suited for IR laser applications.

Magnesium Fluoride Transmission Chart

Magnesium Fluoride Transmission Chart

Magnesium Fluoride optics offer excellent transmission from deep in the ultraviolet region to the mid-infrared. MgF2 windows are extremely durable and introduce minimal aberrations.

UV Fused SIlica Transmission Chart

UV Fused Silica Transmission Chart

The UV grade demonstrates high transmittance in the UV spectrum, but there are dips in transmission centered at 1.4µm, 2.2µm, and 2.7µm due to absorption from hydroxide (OH-) ion impurities. Fused silica is often a preferred material for precision optics due to its consistent and repeatable optical performance.

UV Sapphire Transmission Chart

UV Sapphire Transmission Chart

Sapphire is one of the hardest, most durable and most scratch-resistant materials on earth. Its resistance to extreme environmental conditions, heat, and its broad transmission range (UV to mid-infrared) make it ideal for numerous applications. Shop UV Sapphire Viewports

Zinc Selenide (ZnSe) Transmission Chart

Zinc Selenide Transmission Chart

Zinc Selenide optics are ideal for a wide variety of infrared applications including thermal imaging, FLIR, and medical systems. This chemically vapor deposited material has wide usage in high power CO2 laser systems because of its low absorption coefficient and high resistance to thermal shock. Zinc Selenide (ZnSe) is a relatively soft material that scratches easily and it is not recommended in harsh environments.