G052404525 12.7 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-100mm 725-1050nm

This is a high-quality, mounted double-concave lens from Qioptiq Photonics, designed for precision optics applications. The lens has a diameter of 12.7 mm and a center thickness of 1.5 mm, making it compact and suitable for various setups. The effective focal length (EFL) of this lens is -100mm, indicating its concave nature, which is further emphasized by its radii of curvature, r1 and r2, being -104.41mm and 104.41mm respectively.

The lens is made of N-BK7 Schott glass, a popular choice for its high homogeneity, low auto-fluorescence, and excellent transmission properties in the visible and near-infrared spectrum. This particular lens is designed to operate in the wavelength range of 725-1050nm, making it suitable for a wide range of applications, including but not limited to, biomedical imaging, spectroscopy, and optical metrology.

The lens features broadband anti-reflection coatings on both the front and back surfaces. These coatings, identified as 'qio bbar arb2nirnbk7', are designed to minimize surface reflections and increase transmission, thereby enhancing the overall performance of the lens. The lens's spherical shape ensures a wide field of view and low distortion, making it an excellent choice for imaging applications.