This is a Plano-Concave Lens, type SLB-15-100NIR1, sourced from OptoSigma. The lens has a diameter of 15.0 mm and a focal length of -100.0 mm, making it suitable for a variety of optical applications. The lens is made of n-bk7 schott material, a popular choice due to its excellent optical properties.
The lens features a spherical shape with a base shape of circular. The geometry includes a thickness edge of 2.5 mm and a thickness center of 2 mm. The inner and outer radii are both 0, and the back focal length is -101.3 mm. The lens is coated with opt ir1 on both the front and back, providing enhanced performance in the 633-1064nm wavelength range.
The item is currently in stock and available for purchase. For more information, please refer to the vendor's website using the provided weblink.