SLB-25.4-200NIR1 25.4 mm Dia. x -200.0 mm FL; Coated; Plano-Concave Lens 633-1064nm

The SLB-25.4-200NIR1 is a Plano-Concave Spherical Lens, 25.4 mm in diameter, with a focal length of -200.0 mm, sourced from OptoSigma. This lens is designed for use with wavelengths between 633 and 1064 nm, making it suitable for a range of applications in the near-infrared spectrum.

The lens is made from n-BK7 Schott, a high-quality borosilicate glass known for its excellent optical properties. The lens has a thickness of 2.8 mm at the edge and 2 mm at the center, providing a robust and durable structure. The inner and outer radii are both 0 mm, indicating a flat surface on one side and a concave surface on the other.

The lens features a Broadband Anti-Reflection Coating (AR) on both the front and back surfaces, specifically Opt IR1. This coating is designed to reduce surface reflections and increase transmission in the 633-1064 nm range, enhancing the lens's performance in near-infrared applications.

The geometry of the lens is defined by its diameter, thickness, and focal length, as well as the radii of curvature of its surfaces. The back focal length (BFL) is -201.3 mm, slightly longer than the effective focal length (EFL) due to the thickness of the lens.