49-790-INK 12.7 mm Dia. N-BAK1/N-SF15 Achromatic Doublet; EFL=50.8mm VIS-NIR 400-1000nm

The 49-790-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 to near-infrared spectrum, spanning 400-1000nm. The lens is specifically designed for use in applications that require superior image quality and color correction.

The lens features a focal length of 50.8mm, making it suitable for a wide range of optical systems. The achromatic design, which combines two different types of glass (N-BAK1 and N-SF15), effectively eliminates chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. This results in sharper images with improved color accuracy.

The lens has a center thickness of 2.5mm and an edge thickness of 3.16mm, providing robustness and durability. The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, enhancing its transmission capabilities and protecting it from environmental factors.

This lens is a multiplet, meaning it is composed of multiple elements. The geometry of the lens is carefully designed to provide the best possible performance. The lens has a radius of curvature of 33.17mm on the first surface and -23.98mm on the second surface, with a third surface radius of -89.03mm. The lens is designed to be used in systems where the object distance is greater than the focal length.