This is the G340160525 12.7 mm Dia. UVFS Plano-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. This lens is designed for use in the ultraviolet to near-infrared spectrum, with a specified wavelength of 355 nm.
The lens is spherical in shape, featuring a plano-concave base type and a circular geometry. The diameter of the lens is 12.7 mm, and it has a center thickness of 4 mm. The effective focal length (EFL) of this lens is -20 mm, indicating that it is a diverging lens.
The lens is made from UVFS, a material with a high damage threshold and excellent transmission properties in the UV to NIR range. The lens is unmounted and fused silica, providing flexibility in integration into various optical systems.
The lens comes with broadband anti-reflection coatings on both the front and back surfaces. The coating is Qio Bbar Arb2nirnbk7, designed to reduce surface reflections and increase transmission across the lens's spectral range.
This lens is currently in stock and available for purchase on the Qioptiq Photonics website. For more detailed information and specifications, please refer to the provided weblink.