This is a HO-BXL12.5-3.2 12.5mm Dia. N-BK7 Double-Convex Lens, designed with an effective focal length (EFL) of 40mm and a diameter of 12.5mm. The lens is sourced from Holmarc Opto-Mechatronics, a reputable vendor in the optical industry.
The lens is a Spherical Lens (Convex-Convex) type, featuring a base shape of a circle. The geometry of the lens includes a thickness edge of 2mm, inner radius of 0mm, and an outer radius of 0mm. The curvature of the lens is defined by the first and second radii (R1 and R2) of 41.216794mm and -41.216794mm respectively.
The lens is made of N-BK7 Schott, a popular material in the optical industry due to its excellent optical properties. The wavelength for this lens is 587.6nm. The lens does not have any coating, making it uncoated.
The lens is in stock and available for immediate purchase. For more information, please refer to the vendor's website at https://www.holmarc.com/bi_convex_lenses.php.