HO-BXL25-04B 25mm Dia. N-BK7 Double-Convex Lens; EFL=100mm BBAR 400-700nm

The HO-BXL25-04B is a high-quality double-convex lens offered by Holmarc Opto-Mechatronics, a renowned vendor in the optical industry. This lens, with a diameter of 25mm, is designed for use in a wide range of applications, thanks to its impressive optical properties and robust construction.

The lens is made from N-BK7, a popular glass type known for its excellent optical characteristics. N-BK7, or Schott glass, is a borosilicate crown glass that offers low dispersion and high transmission in the visible spectrum, making it an ideal choice for many optical systems.

The HO-BXL25-04B features a focal length of 100mm, indicated as EFL (Effective Focal Length). This length is a critical parameter in lens selection, as it directly influences the lens's magnification and field of view. The lens's geometry includes a thickness of 2mm at the edge, with radii of curvature R1 and R2 at 103.717722mm and -103.717722mm, respectively.

An essential feature of this lens is its broadband anti-reflection (BBAR) coating, designed for the 400-700nm wavelength range. This coating significantly reduces surface reflections, enhancing the lens's transmission and overall performance. The BBAR coating is applied to both the front and back surfaces of the lens, ensuring optimal light transmission and minimal loss.