49-778-INK 25.4 mm Dia. N-BAF10/N-SF6 Achromatic Doublet; EFL=38.1mm VIS 0° 425-675nm

The 49-778-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 25.4 mm, is designed for use in the visible light spectrum, specifically between 425 and 675 nanometers. The lens boasts an effective focal length (EFL) of 38.1 mm, making it suitable for a wide range of optical applications.

The lens is composed of two types of glass, N-BAF10 and N-SF6, both from Schott, a leading manufacturer of optical glass. This combination of materials helps to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light to the same point, providing sharper images and improved color accuracy.

The 49-778-INK features a standard curve coating on both the front and back surfaces. This coating, known as EDM VIS-0, is designed to enhance the lens's performance in the visible light spectrum. It reduces reflection and increases transmission, improving the overall efficiency and quality of the optical system.

The lens has a thickness of 9.44 mm at the edge and 10.5 mm at the center, with an additional 3 mm of material at the center for added durability. The inner and outer radii are not specified, indicating that they are not critical to the lens's performance.