The 49-288-INK is a high-quality achromatic doublet lens, boasting a 50 mm diameter and an effective focal length (EFL) of 300 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their website, currently listed as in stock.
This achromatic doublet lens is meticulously crafted from two distinct materials, N-BAK4 and N-SF10, both from the esteemed Schott glass catalog. The lens features a sophisticated geometry, with an edge thickness of 10.24 mm, a center thickness of 9 mm, and a center a thickness of 3.5 mm. The inner and outer radii are optimized for superior performance.
The lens is coated with the EDM VIS-0 standard curve on both the front and back surfaces, ensuring optimal light transmission and reducing unwanted reflections. The lens shape is a multiplet, further enhancing its optical capabilities.