The SLB-20B-40NM is a high-quality double-concave lens, boasting a diameter of 20.0 mm and a focal length of -39.7 mm. This lens is sourced from OptoSigma, a renowned vendor known for their precision optical components.
The lens is made from n-bk7 schott, a popular material in the optical industry due to its excellent optical properties. The base shape of the lens is circular, and it features a spherical geometry, with a center thickness of 2.0 mm and an edge thickness of 4.4 mm. The inner and outer radii are both 0, indicating a uniform curvature.
The SLB-20B-40NM 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 ideal for a wide range of applications.
The lens is currently in stock and available for immediate purchase. For more information, please refer to the vendor's website using the provided weblink.