Esco Optics, Inc.

Witness Sample, Transmission, 1.400-1.599

Witness Sample, Transmission, 1.400-1.599 - Main image
$42 $70 In stock

Category: Transmission Witness Samples

Esco Optics witness samples used for transmission are precision polished on both sides to a scratch dig of 60-40. Flatness of each side is < 1 wave @ 633nm at 80% CA. Parallelism < 1 arc min. Edges are safety beveled. Witness sample diameter is 25.40mm and the thickness is 1.50mm. 

All of our witness samples are melt lot controlled and individual melt data is available on request. The refractive index values listed are representative of nd at 587nm. 

Diameter 25.40 mm +/-0.10
Thickness  1.50 mm +/-0.25
Flatness < 1.0 wave @ 633nm 
Surface Quality 60-40 scratch-dig
Edges Fine ground and beveled
Material info CaF2, UV Fused Silica, S-FPL53, S-FPL51, S-BSL7, S-BAL35, Schott KG2, Schott KG5 
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Customer Reviews (4.8 / 5 · 5 reviews)

Madison ★★★★★

The 60-40 scratch dig looks clean under my loupe, no sleeks or edge chips on either face. Parallelism held tight enough that my setup didn't need realignment between the 1.400 and 1.599 runs. Flatness reads under a wave across the clear aperture, which is what I needed for repeatable transmission nu

Ellie ★★★★★

Ordered these to check coating runs before committing a full batch, and the parallelism held up nicely across the set. Both sides are polished clean to 60-40, no sleeks or digs I could spot under the scope.

Amelia ★★★★★

The flatness on these witness samples is spot-on for my interferometer tests — easily within the specified λ/1. Parallelism is tight enough that I don't have to realign between runs.

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