This is the LB7638-E3 lens, a high-quality optical component sourced from Thorlabs, a leading vendor in the field. The lens is a Spherical Lens of the Sub Type Spherical Lens (Convex-Convex), featuring a Base Shape of Circular.
The lens has a diameter of 25.4 mm, with a thickness at the edge of 2 mm and a center thickness of 2.6 mm. The Effective Focal Length (EFL) of this lens is 100 mm, making it suitable for a wide range of optical applications.
The lens is made of ZnSe (Zinc Selenide) material, specifically identified as "znse connolly" in the material database. It is designed to operate within the wavelength range of 10600 nm.
The lens features a coating on both the front and back surfaces. The front coating is "tho e3znsearc7000120", and the back coating is also "tho e3znsearc7000120". This coating enhances the lens's performance and durability.