This is a Plano-Convex lens, type SLB-50.8-200PM, sourced from OptoSigma. The lens has a diameter of 50.8 mm and a focal length of 200.0 mm, making it suitable for a wide range of optical applications. The lens is made from n-bk7 schott material, a popular choice due to its excellent optical properties and high Abbe number.
The lens features a spherical shape, with a front radius (r1) of 103.8 mm and a back focal length (bfl) of 196 mm. The edge thickness of the lens is 2.9 mm, while the center thickness is 6.1 mm. This lens is coated with opt m on both the front and back surfaces, enhancing its transmission characteristics within the wavelength range of 400-700nm.
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.