12-923 12.5 mm Dia. S-BAH11/N-SF10 Mounted Achromatic Doublet; EFL=20mm MgF2 400-700nm

This is a 12.5 mm diameter achromatic doublet lens, model number 12-923, sourced from the renowned optical vendor, Edmund Optics. The lens is mounted and features an effective focal length (EFL) of 20mm, designed for use within the wavelength range of 400-700nm.

The lens is composed of two elements: S-BAH11 from Ohara and N-SF10 from Schott. The S-BAH11 is a high-index, low-dispersion glass, while the N-SF10 is a dense, high-index flint glass. The combination of these materials in a doublet configuration effectively minimizes chromatic aberration, a common issue in optical systems.

The lens has a base shape of a circle and features a geometry that includes a thickness of 4.62mm at the edge, a central thickness of 5.25mm, and a central thickness 'a' of 1.1mm. The radii of curvature for the first and second surfaces are 13.98mm and -9.35mm, respectively, while the third surface has a radius of -76.14mm.

The lens is coated with EDM MgF2 standard curve on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency and quality of the optical system.

The lens is currently in stock and available for immediate purchase. For more information, including pricing and delivery details, please refer to the provided weblink.