The 49-953 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is specifically designed for use in the visible (VIS) and near-infrared (NIR) spectrum, spanning 400-1000nm. The lens features a 15mm diameter and an effective focal length (EFL) of 20mm, 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. These materials are carefully selected for their optical properties, contributing to the lens's overall performance. The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000) on both the front and back surfaces, further enhancing its capabilities in the specified wavelength range.
The geometry of the lens is meticulously designed, with a center thickness of 6.8mm and edge thickness of 5.98mm. The lens's radii are also precisely engineered, with r1 at 14.01mm, r2 at -11.36mm, and r3 at -44.21mm. These specifications contribute to the lens's excellent imaging performance.