This is a Plano-Concave Lens, type Spherical, with a circular base shape, sourced from Qioptiq Photonics. The lens has a diameter of 12.7 mm and a center thickness of 5.6 mm. The effective focal length (EFL) is -100mm, indicating a diverging lens, which spreads out light rays that pass through it. The inner and outer radii are both 0, suggesting a simple concave shape.
The lens is made of UVFS material with the ID 'mal-1965'. It is designed to work with a wavelength of 355 nm. The lens features a coating on both the front and back surfaces, specifically 'qio hp nbar arhs-yag'. This coating is likely designed to enhance the lens's performance in specific applications, such as reducing reflection or increasing transmission.
The lens is currently in stock and available for purchase on the Qioptiq Photonics website. For more detailed information, please refer to the provided weblink.