This is the HO-BXL25-02 25mm Dia. N-BK7 Double-Convex Lens, a high-quality optical component sourced from Holmarc Opto-Mechatronics. The lens is designed with a base shape of a circle and features a spherical geometry, specifically a convex-convex shape.
The lens has a diameter of 25mm and a thickness at the edge of 2mm. The effective focal length (EFL) of this lens is 50mm. The first radius of curvature (R1) is 50.791603, and the second radius of curvature (R2) is -50.791603. The inner and outer radii are both 0.
The lens is made of N-BK7 Schott, a popular optical glass known for its excellent optical properties. It is designed to work with a wavelength of 587.6nm. The lens does not come with any coating, as indicated in the item data.
For more information about this product, please refer to the vendor's website at https://www.holmarc.com/bi_convex_lenses.php. The link is valid and the product is in stock as of the last update.