This is a Plano-Concave Lens, type SLB-30-60NM, sourced from OptoSigma. The lens has a diameter of 30.0 mm and a focal length of -60.0 mm, making it suitable for a variety of optical applications. The lens is made from n-bk7 schott material, a popular choice due to its excellent optical properties and versatility.
The lens features a spherical shape, with a center thickness of 2.0 mm and an edge thickness of 5.9 mm. The inner and outer radii are both 0.0 mm, indicating a uniform curvature. The lens is coated with opt m on both the front and back surfaces, enhancing its performance in the 400-700nm wavelength range.
According to the vendor's information, this item is currently in stock and available for immediate purchase. The product's webpage provides more detailed specifications and purchasing information.