49-363-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=175mm VIS-NIR 400-1000nm

The 49-363-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25 mm, is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, specifically catering to the wavelength range of 400-1000nm.

The lens boasts an effective focal length (EFL) of 175mm, making it suitable for a wide range of optical applications. The achromatic design of this doublet lens ensures that chromatic aberration, the common issue of different colors of light focusing at different points, is minimized. This is achieved through the use of two different types of glass, N-BK7 and N-SF5, each with unique refractive indices and dispersions.

The lens geometry is meticulously designed, with a center thickness of 6mm and edge thickness of 7.94mm. The radii of curvature for the first and second surfaces are 109.16mm and -79.38mm respectively, while the third surface has a radius of curvature of -226.03mm. The lens is coated with the EDM VIS-NIR 0SP2002000 coating on both the front and back surfaces, enhancing its performance in the specified wavelength range.

In terms of shape, the lens is a multiplet, indicating that it is composed of multiple elements. This design allows for more precise control over the optical properties of the lens, making it a versatile choice for various applications.

The lens is currently in stock and can be purchased directly from the Edmund Optics website using the provided weblink.