SLB-15B-40PIR2 15.0 mm Dia. x 40.6 mm FL; Coated; Double-Convex Lens 750-1550nm

The SLB-15B-40PIR2 is a spherical lens with a base shape of a circle, designed and manufactured by OptoSigma. This lens is specifically designed for use within the wavelength range of 750-1550nm, making it suitable for a variety of applications within the infrared spectrum.

The lens has a diameter of 15.0 mm and a thickness at the edge of 2.0 mm, while the thickness at the center measures 3.4 mm. The effective focal length (EFL) of this lens is 40.6 mm, which is a critical specification for determining the lens's magnification power. The first radius of curvature (R1) is 41.52 mm, and the second radius of curvature (R2) is -41.52 mm, indicating a double-convex lens design. The back focal length (BFL) of this lens is 39.4 mm.

The lens is made from n-BK7 Schott, a popular optical glass due to its excellent optical properties and high transmittance in the visible and near-infrared spectral regions. The lens is coated with Opt IR2 on both the front and back surfaces, which is a broadband anti-reflection coating designed for the 750-1550nm range. This coating helps to reduce surface reflections, thereby increasing the amount of light transmitted through the lens.