49-274 4 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=8mm VIS 0° 425-675nm

The 49-274 is a high-quality achromatic doublet lens, boasting a 4 mm diameter and an effective focal length (EFL) of 8 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website.

The lens is meticulously crafted from two distinct materials, N-BAF10 and N-SF10, both from the reputable Schott glass catalog. The combination of these materials in a doublet configuration effectively minimizes chromatic aberration, a common issue in optical systems. The lens features a standard antireflective coating, denoted as "edm vis-0 std curve," on both the front and back surfaces, further enhancing its optical performance by reducing surface reflections.

The lens geometry is intricately designed, with an inner radius of 0 mm, an outer radius of 0 mm, and a center thickness of 1.5 mm. The edge thickness measures 2.09 mm, while the central thickness near the aperture is slightly thinner at 1.03 mm. The lens's base shape is circular, and its overall design is classified as a multiplet due to its multiple glass elements.

This lens is an excellent choice for various applications that require a compact, high-performance optical element within the specified wavelength range. Its achromatic design and high-quality materials make it a reliable and efficient option for a wide array of optical systems.