49-948-INK 6.25 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=7.5mm VIS-NIR 400-1000nm

The 49-948-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 6.25 mm, is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens is specifically designed for use in a variety of applications, including but not limited to, imaging, metrology, and beam shaping.

The lens features a focal length of 7.5 mm, denoted as EFL (Effective Focal Length), which is a critical parameter in lens selection. The EFL determines the lens's magnification power and is a key factor in determining the lens's suitability for a specific application.

The lens is constructed from two types of glass, N-BAF10 and N-SF57, both from Schott, a leading manufacturer of high-quality optical glass. The use of these materials ensures excellent optical performance, minimizing chromatic aberration, a common issue in lens systems.

The lens is coated with Edmund Optics' proprietary VIS-NIR coating, denoted as edm visnir0sp2002000. This coating is designed to enhance the lens's performance in the VIS-NIR spectrum, reducing reflection and increasing transmission.

The lens's geometry is another critical aspect. It has a thickness of 4.61 mm at the edge, with an inner radius of 0 and an outer radius of 0. The lens's center thickness is 5 mm, with an additional thickness 'a' of 1 mm. The lens's base shape is circular, making it suitable for a wide range of applications.