This is a G063354525 Plano-Concave Lens, a spherical lens with a base shape of a circle, 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 -100mm, making it a negative or diverging lens. This particular lens is designed to operate within the wavelength range of 725-1050nm, which includes near-infrared light.
The lens is made from 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, enhancing the lens's performance in its designated wavelength range.
For more detailed information, please refer to the vendor's website at https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Plano-Concave-Lenses/Plano-concave-lenses-mounted-fused-silica.html. The link provides current stock status and additional specifications.