This is a Plano-Concave lens, a type of spherical lens, sourced from Qioptiq Photonics. The lens has a diameter of 12.7 mm and a center thickness of 1.5 mm. The effective focal length (EFL) of this lens is -30mm, making it a negative lens. This particular lens is designed to work with wavelengths between 725nm and 1050nm.
The lens is made of N-BK7, a type of glass commonly used in optical applications due to its excellent optical properties. The front and back surfaces of the lens are coated with qio bbar arb2nirnbk7, a coating that enhances the lens's performance by reducing reflection and increasing transmission.
The lens is unmounted, meaning it does not come with any housing or mounting mechanism. This allows users to integrate it into their systems in a way that best suits their needs. According to the vendor's website, the lens is in stock, making it readily available for purchase and use.