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Magnesium Fluoride (MgF2) Windows

Magnesium Fluoride Windows applicable for wide range spectrum, transmits well into the VUV region at the hydroge Lymanalpha line  and beyond and it is particularly useful for Excimer laser application.

It is resistant to mechanical and thermal shock, to radiation, and is chemically stable.


  • product origin:

    China
  • shipping port:

    Fuzhou China
  • lead time:

    4 working weeks
  • payment:

    T/T Payment, Western Union
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  • description

Magnesium Fluoride (MgF2) Windows offer excellent broadband transmission from the deep-UV to the mid-infrared. DUV transmission makes them ideal for use at the Hydrogen Lyman-alpha line and for UV radiation sources and receivers, as well as excimer laser applications. MgF2 is a rugged material resistant to chemical etching, laser damage, and mechanical and thermal shock. It has a Knoop Hardness of 415 and index of refraction of 1.38.


Specifications:
 
Material: Magnesium Fluoride single crystal
Orientationplease specify
Diameter Tolerance: +0.0, -0.1mm
Thickness Tolerance: ±0.1mm
Clear Aperture: >85%
Parallelism: 3 arc minute
Surface Quality: 60-40 scratch and dig
Wavefront Distortion: per 25mm @633mm
Bevel: Protective ( <0.2mm x 45° )
Coating: Optional
 
Standard MgF2 Window
 
Round Shape:
Φ10x1  Φ12.7x1 Φ20x2  Φ25x1  Φ25.4x3  Φ30x2  Φ30x3  Φ38.1x3
 
Note for MgF2 Window:
(1). Please specify the cutting direction when ordering
(2). Custom-made MgF2 windows at any size are available.
Besides round, MgF2 windows at shape of quadrate, triangular, or other polygonal are available. 
(3). Thickness from 1.0mm to 80.0 mm is available.
(4). Better bevel is available upon request.

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1、What Metallic Coated types can Uni-Optics supply?


Uni-Optics mainly offers four coating types, including:

1) UV Enhanced Aluminum : Ravg > 85% from 250nm to 400nm

2) Protected Aluminum: Ravg > 87% from 400nm to 800nm

3) Protected Silver: Ravg > 95% from 400nm to 20um

4) Protected Gold: Ravg > 98% from 650nm to 16um



2、What are features of Metallic coated mirror?


Metallic coated mirror have many key features below:

Wide spectral range

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Low cost

Non-durable

Relatively low reflectance

Low laser damage threshold


3、What UNI Optics can do for you?


Common Specifications:

Substrate Materials: N-BK7, Fused silica, Pyrex;Float glass

Dimensional tolerance: +/-0.1mm

Surface quality:  60-40

Parallelism:  3’

Flatness: λ/4 per 25mm@633nm

Bevel: Protective

One surface: Polished and Metallic coating

The other surface: Fine ground


Note: Aluminum is the most widely used metal reflection film, from near UV to near IR, have high reflectivity, and with low cost. Silver has higher reflectivity in the visible and near infrared wavelength than the aluminum film, but the silver in the air will be rapid oxidation, color darkening, makes the film performance and firmness declined rapidly. Gold film has a good consistency with high reflectivity in the near, middle and far infrared range, can control the thermal radiation effectively, but it is relatively soft, easy bruising, and should be pay very attention to clean, and the cost is very high.




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