This is a G052201525 6 mm diameter N-BAK4 mounted double-convex lens, designed for use in the 725-1050nm wavelength range. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.
The lens is of the spherical type, specifically a convex-convex lens, with a base shape of a circle. The geometry of the lens includes a diameter of 6 mm, a thickness at the edge of 0.9 mm, and a thickness at the center of 2.9 mm. The effective focal length (EFL) of the lens is 5 mm. The first radius of curvature (r1) is 5.085 mm, while the second radius of curvature (r2) is -5.085 mm. The lens does not have an inner or outer radius.
The lens is made from N-BAK4 Schott, a high-quality optical material known for its excellent transmission properties and low auto-fluorescence. The lens is coated with Qio Bbar Arb2nirnbk7 on both the front and back surfaces, which provides broadband anti-reflection properties.
The lens is in stock and available for immediate purchase. For more information, please refer to the vendor's website at https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Symmetric-Convex-Lenses/Symmetric-convex-lenses-mounted.html.