The SLB-20-150NM is a Plano-Concave Spherical Lens, boasting a diameter of 20.0 mm and a focal length of -150.0 mm. This lens is sourced from OptoSigma, a renowned vendor in the optical industry. The lens is made from n-bk7 schott material, a popular choice due to its excellent optical properties.
The lens's geometry is meticulously designed, with a thickness edge of 2.6 mm and a thickness center of 2.0 mm. The inner and outer radii are both zero, indicating a circular shape. The lens's effective focal length (EFL) is -150.3 mm, and the back focal length (BFL) is -151.3 mm, demonstrating its concave nature.
The SLB-20-150NM is coated with Opt M on both the front and back surfaces, enhancing its performance in the 400-700nm wavelength range. This coating ensures high transmission and low reflection, making it suitable for various applications.