This is a 12.7 mm diameter Plano-Concave lens, manufactured by Qioptiq Photonics, featuring a center thickness of 1.5 mm and an effective focal length (EFL) of -100 mm. The lens is made of N-BK7 Schott glass, a popular choice for its high homogeneity and excellent transparency in the visible spectrum.
The lens's geometry is characterized by a spherical shape, with a radius of curvature (R1) of -51.212 mm for the concave surface. The lens does not have an air gap between the lens surfaces, indicated by the inner and outer radii being both zero.
This lens is designed to operate at a wavelength of 588 nm, making it suitable for applications in the yellow-orange part of the visible light spectrum. It is uncoated, which means it does not have any anti-reflective or other coatings applied to its surfaces.
The item data indicates that this lens is in stock and available for purchase. For more information, including pricing and delivery details, please refer to the provided web link: https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Plano-Concave-Lenses/Plano-concave-lenses-mounted-N-BK7.html