Esco Optics, Inc.

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

Commercial Quality Windows, Circular, I2-IR Low OH Grade Fused Silica - Main image
Commercial Quality Windows, Circular, I2-IR Low OH Grade Fused Silica - View 2
$18.06 $27.37 In stock

Category: Commercial Quality Circular

Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.125 mm

Surface Accuracy

≤ 2λ per inch

Surface Quality

60-40 Scratch-Dig or better

Parallelism

<5'

Edges

Fine ground and safety beveled*

Clear Aperture

90%


*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 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.

To find out more about this material click here.

Ready to check out

Review the selected option and total at checkout.

Delivery to you

Allow time for the store to prepare your order before transit begins.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
Talking through a refund

Send the store your order number and the reason for your request.

Please contact us for the refund processing timeframe before returning an item.

View policy
Your shipping options

Choose from the delivery options available for your address.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Before you return a product

Check the conditions for your product before sending it back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.4 / 5 · 5 reviews)

Charlotte Q. ★★★★★

Ordered two of these for an interferometer setup and the surface quality is genuinely 60-40 or better, no sleeks or digs visible under my loupe. Diameter came in right at spec too, which matters when you're mounting them in a fixed ring.

Chloe ★★★★★

I checked the parallelism on a bench and it came in well under 5 arc minutes, which is rare at this price. The 60-40 scratch-dig finish held up fine after a week of daily handling in our lab setup.

Amelia ★★★★☆

The 60-40 scratch-dig surface quality held up fine under a quick visual inspection, and the diameter tolerance was right on the money. Took a bit longer than expected to ship, but for the parallelism spec at under 5 minutes of arc, it's a solid deal for the price.

Related Products