HO-BXL12.5-04B 12.5mm Dia. N-BK7 Double-Convex Lens; EFL=50mm BBAR 400-700nm

This is a high-quality double-convex lens from Holmarc Opto-Mechatronics, designed for use in a wide range of optical applications. The lens has a diameter of 12.5mm and a thickness at the edge of 2mm, making it compact and versatile. The effective focal length (EFL) of this lens is 50mm, providing a moderate level of magnification suitable for many uses.

The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is often used in high-precision optical systems due to its low dispersion and high transmission in the visible spectrum. The lens's geometry includes a first radius of curvature (R1) of 51.68441mm and a second radius (R2) of -51.68441mm, which are designed to minimize spherical aberration and ensure optimal image quality.

The lens features broadband anti-reflection (BBAR) coatings on both the front and back surfaces, designed to operate within the 400-700nm wavelength range. This coating reduces surface reflections, improving light transmission and enhancing the overall performance of the lens. The coating is applied using the Holmarc BBAR 0 AOI process, ensuring high uniformity and durability.