This is a Plano-Concave lens with a 6 mm diameter, sourced from Qioptiq Photonics. The lens is made of N-BK7, a popular material in the optical industry due to its excellent optical properties. The lens's design features a concave shape on one side and a flat surface on the other, making it a Spherical Lens of the Plano-Concave type.
The lens's center thickness is 1 mm, and it has an effective focal length (EFL) of -10 mm, indicating that it is a diverging lens. The radius of curvature for the concave surface is -5.012 mm. The lens's inner and outer radii are both 0, suggesting that the lens's edges are not curved.
The lens is coated with Qio AL RALVIS AOI 45 on both the front and back surfaces. This coating enhances the lens's performance in specific wavelengths, in this case, 588 nm. The lens's shape is spherical, a common choice for its ease of manufacturing and versatility.
The lens is currently in stock and available for purchase on the Qioptiq Photonics website. For more information, users can refer to the provided weblink.