Esco Optics, Inc.

Commercial Quality Windows, Square, I2-IR Low OH Grade Fused Silica

Commercial Quality Windows, Square, I2-IR Low OH Grade Fused Silica - Main image
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$25.72 $37.82 In stock

Category: Commercial Quality Square

Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.125 mm

Surface Accuracy

≤ 2λ per inch

Surface Quality

60-40 Scratch-Dig or better

Parallelism

<10'

Edges

Fine ground and safety beveled*

Clear Aperture

85%


*parts under 25.4mm in diameter may not have beveled edges

Low OH IR grade fused silica allows for exceptional transmission up to 3 microns. Combined with a low coefficient of thermal expansion, superior homogeneity and low birefringence, low OH IR grade fused silica is an outstanding alternative to significantly more expensive IR materials. Applications of interest include process control and inspection using machine vision, high resolution SWIR imaging, remote sensing and metrology. 

Don't see a part that matches exactly what you need, perhaps you'd like to modify a dimension or add a coating?  Use our fast online quote tool to find out what a modification would cost. 

To find out more about this material click here. 

To learn more about benefits of this material please head over to our blogpost. 

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Customer Reviews (4.2 / 5 · 5 reviews)

Emily J. ★★★★★

I was worried the ±0.125 mm tolerance would be sloppy at this price, but both the diameter and thickness measured dead on when I checked them with calipers. Edge chips were my main concern after a bad batch from another supplier, and these arrived clean with no visible flaws.

Jacob ★★★★★

The +/-0.125mm thickness tolerance made alignment in my optical rig a breeze. Combined with the surface accuracy of ≤2λ per inch, the image clarity is just outstanding.

Olivia ★★★★☆

The parallelism spec of under 10 arc-minutes was exactly what my setup needed, and the surface accuracy holds up well under my interferometer check. Only gripe is the edges could be a touch smoother, but for the price, it's a solid piece of glass.

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