38-401 12.5mm Dia. x 25.0mm FL; NIR II Coated; Plano-Convex Lens NIR II 750-1550nm

The 38-401 is a Plano-Convex lens, a type of spherical lens, sourced from Edmund Optics. This lens boasts a diameter of 12.5mm and a focal length of 25.0mm, making it suitable for a wide range of applications. The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transmittance and low auto-fluorescence, making it ideal for use in the near-infrared (NIR) spectrum, specifically between 750nm and 1550nm.

The lens features a standard curve coating on both the front and back surfaces, specifically the EDM NIR-II coating. This coating enhances the lens's performance in the NIR spectrum by reducing surface reflections and increasing transmission. The edge thickness of the lens is 1.29mm, while the center thickness is 3.8mm, providing a balanced structure for optimal performance.

The lens's geometry includes an inner radius of 0mm and an outer radius of 0mm, indicating a uniform curvature. The back focal length (BFL) is 15mm, and the effective focal length (EFL) is 17.5mm. This lens is a versatile and high-performing option for applications in the NIR spectrum.