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 -50mm, making it a negative lens. This lens is designed to work with a wavelength of 588 nm.
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 broadband anti-reflection coating that reduces surface reflections and increases transmission.
The lens is unmounted, meaning it does not come with any housing or mounting mechanism. This allows for flexibility in integrating the lens into various optical systems, but also requires careful handling and precise alignment during installation.
The lens is currently in stock and can be purchased directly from the Qioptiq Photonics website. The provided weblink leads to the product page for easy access.