This is a high-quality spherical lens, specifically a double-convex lens, sourced from the reputable vendor MKS/Newport. The lens boasts a base shape of a circle and is designed for use with a wavelength of 589nm.
The lens has a diameter of 25.4mm and a thickness at the edge of 3mm. The center thickness is 5.102mm, providing a robust structure for various applications. The effective focal length (EFL) is 75.6mm, and the first and second radii of curvature are 77.265mm and -77.265mm respectively. The back focal length (BFL) is 73.89mm, and both the inner and outer radii are 0mm.
The lens is made from the high-grade material n-BK7 Schott, ensuring excellent optical performance. It features a double-sided anti-reflective coating, specifically the New AR-33 fromfigure, on both the front and back surfaces. This coating enhances the lens's performance in laser applications, particularly at 1064nm.