Esco Optics, Inc.

Commercial Quality Windows, Square, Borofloat 33

Commercial Quality Windows, Square, Borofloat 33 - Main image
$10.75 $16.04 In stock

Category: Commercial Quality Square

Diameter Tolerance

+/- 0.125 mm

Thickness Tolerance

+/- 0.250 mm

Surface Accuracy

5λ per inch

Surface Quality

60-40 Scratch-Dig or better

Parallelism

<15'

Edges

Fine ground and safety beveled*

Clear Aperture

85%

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

Commercial windows are used for sight glasses, instrument windows, beamsplitter substrates, vacuum windows and welding window substrates. Esco carries a complete inventory of square commercial optical windows made from Borofloat 33 which is a direct equivalent to Pyrex, which is no longer manufactured. Windows are polished both sides.

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. 

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Customer Reviews (4.4 / 5 · 5 reviews)

Matthew ★★★★★

The parallelism on these is the tightest I've seen at this price - my laser bounced back dead center without any shimming. Surface quality looks clean under a flashlight, no digs or sleeks anywhere. Took two weeks to arrive, but worth the wait.

Aurora ★★★★★

I was worried about edge chips since I'm using these in a laser setup, but the edges came clean and the parallelism is dead on. The ±0.125 mm diameter tolerance held up when I measured them with calipers.

Julian F. ★★★★★

The surface quality is exactly what I needed for an optical setup—60-40 scratch-dig and zero visible defects on arrival. Parallelism came in well under the 15' spec, so my beam alignment stayed true without extra shimming.