Frequently Asked Questions

The optics are available in diameters ranging from 2mm to 400mm.

The optics are made from BK7, sapphire, fused silica, ZnS2, CaF2, Si, and Ge.

The surface quality of the optics is 40-20 standard.

The flatness of the optics is specified as 1/10 lambda.

The available coatings for the optics include AR, HR, Silver, Aluminum, and Golden.

The chamfer specification for the optics is 0.25mm x 45 degrees.

You can contact them via email at sales@sunday-optics.com, by phone at 86-431-81323204, or via Skype at bess612537.

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