This is the G063873000 model from Qioptiq Photonics, a 25.4 mm diameter Plano-Concave Lens made of N-BK7 Schott glass. The lens is mounted and has a center thickness of 1.5 mm. It is designed with a negative focal length (EFL) of -200mm, making it suitable for applications that require light convergence.
The lens's base shape is circular, and its geometry is spherical, with an inner radius of 0 and an outer radius of 0. The curvature radius (R1) is -104.41mm. The lens is uncoated, which means it does not have any anti-reflective or other coatings.
This lens is intended for use at a single wavelength of 588nm. It is important to note that the performance of the lens may vary depending on the wavelength and the conditions of use.
The lens is currently in stock and can be purchased directly from the Qioptiq Photonics website. For more information, you can visit the provided weblink.