AC508-075-C-ML 50.8 mm Dia. N-BAF10/N-SF6HT Mounted Achromatic Doublet; EFL=75mm 1050-1700nm

The AC508-075-C-ML is a multiplet lens, specifically an achromatic doublet, sourced from Thorlabs. This lens boasts a 50.8 mm diameter and an effective focal length (EFL) of 75mm, designed for use within the spectral range of 1050-1700nm.

The lens is constructed from two distinct materials, N-BAF10 and N-SF6HT, both from Schott. The N-BAF10 is used for the first element, while the N-SF6HT is used for the second. This combination of materials and design helps to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.

The lens features a robust coating, denoted as 'tho ac1050-1700-c', which is applied to both the front and back surfaces. This coating is specifically designed to enhance performance within the 1050-1700nm spectral range.

The geometry of the lens is also noteworthy. It has a thickness of 13.1mm at the edge, with the first and second radii of curvature being 49.9mm and -39.1mm respectively. The third radius of curvature is -230.7mm. The center thicknesses are 19mm for the first center and 2.5mm for the second.

The lens is currently in stock and available for immediate purchase through the Thorlabs website, as indicated by the 'Valid - in stock' status in the item data.