This is a Plano-Concave Lens, a type of spherical lens, sourced from Qioptiq Photonics. The lens has a diameter of 22.4 mm and a center thickness of 1.5 mm. The effective focal length (EFL) of this lens is -40mm, making it a negative or diverging lens. The lens is designed to work within the wavelength range of 725-1050nm, which includes near-infrared light.
The lens is made of UVFS material with the ID 1965. It is mounted, indicating that it is ready for immediate use in optical systems. The lens's front and back surfaces are coated with Qio Bbar Arb2nirnbk7, a broadband anti-reflection coating that reduces surface reflections and increases transmission.
This lens is a versatile component in optical systems, suitable for various applications that require diverging lenses, such as beam expansion, collimation, and imaging. The detailed specifications and high-quality coating make this lens a reliable choice for precision optical applications.