49-771-INK 12.7 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=15mm VIS 0° 425-675nm

The 49-771-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 12.7 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 15mm, making it suitable for a wide range of optical applications.

The lens is composed of two elements, made from N-BAF10 and N-SF57 Schott glass, respectively. These materials are carefully selected to minimize 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, delivering sharp and clear images.

The lens features a standard curvature coating on both the front and back surfaces, denoted as 'edm vis-0 std curve'. This coating enhances the lens's performance by reducing surface reflections, thereby increasing transmission and minimizing flare and ghosting.

The lens geometry is also noteworthy. It has a thickness of 5.72mm at the edge and 6.5mm at the center, with an additional 2mm of material at the center for added robustness. The inner and outer radii are 0mm, indicating a simple, straightforward design.