49-928 12.5 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=17.5mm MgF2 400-700nm

This is a 12.5 mm diameter achromatic doublet lens, catalog number 49-928, sourced from the renowned optical component vendor, Edmund Optics. The lens is characterized by an effective focal length (EFL) of 17.5mm, making it suitable for a wide range of optical applications.

The lens is composed of two elements: N-BAF10 and N-SF57, both from Schott's extensive material library. This combination is strategically designed to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic nature of this doublet ensures that the lens focuses light of multiple wavelengths (400-700nm) onto a single point, enhancing the overall image quality.

The lens features a standard MgF2 coating on both the front and back surfaces. This coating is designed to reduce reflection and increase transmission, particularly in the ultraviolet and visible regions of the spectrum. It also provides protection against environmental factors, ensuring the longevity and durability of the lens.

The geometry of the lens includes a thickness of 5.08mm at the edge, a center thickness of 5.8mm, and a center thickness 'a' of 1.5mm. The lens also features inner and outer radii of 0mm, and radii 'r1' and 'r2' of 12.2mm and -9.82mm respectively. The 'r3' radius is -39.19mm.

This lens is currently in stock and available for immediate purchase. For more information, including pricing and compatibility, please refer to the provided weblink.