This is a Plano-Convex lens, a type of spherical lens, sourced from EKSMA Optics. The lens has a base shape of a circle and a diameter of 25.4 mm. The thickness at the edge of the lens is 2.7 mm, while the thickness at the center is 3 mm. The effective focal length (EFL) of the lens is 600 mm.
The lens is made of BK7 Schott, a popular optical glass known for its excellent optical properties. The radius of curvature for the first surface (R1) is 311.2 mm, while the inner and outer radii are both 0 mm, indicating a plano surface.
This lens is designed to work with light in the wavelength of 546 nm. It comes with a coating of EKS 3217-i0 on both the front and back surfaces, providing anti-reflective properties within the wavelength range of 400-700 nm. This coating enhances the lens's performance by reducing unwanted reflections and increasing transmission.