The 89-235 is a high-quality double-convex lens, sourced from the renowned optical component vendor, Edmund Optics. This lens boasts a 10mm diameter and a focal length of 30mm, making it suitable for a wide range of optical applications.
The lens is crafted from Schott's n-BK7 glass, a material known for its excellent optical properties and versatility. The base shape of the lens is circular, and it features a double-convex geometry, with radii of curvature of 30.58mm and -30.58mm for the first and second surfaces, respectively. This geometry results in a back focal length of 29.17mm.
The 89-235 is coated with YAG-BBAR, a broadband anti-reflection coating that spans the wavelength range of 500-1100nm. This coating is applied to both the front and back surfaces of the lens, reducing surface reflections and enhancing overall transmission.
The lens has a thickness of 1.68mm at the edge and 2.5mm at the center. The inner and outer radii are 0mm, indicating a uniform curvature across the lens surface.