Elliptical windows are used for large angles of incidence so that they present a circular cross section to the incoming beam. They are offered for use at 45° and at Brewster’s angle. These elliptical plane windows are polished to a laser grade finish on both sides. Select a coating appropriate to your application or contact us with your special coating requirements.
If thickness ≤ 1.5mm : λ/4 @ 633nm
If thickness > 1.5mm : λ/10 @ 633nm