47-703-INK 15 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=75mm VIS 0° 425-675nm

The 47-703-INK is a high-quality achromatic doublet lens, 15 mm in diameter, with an effective focal length (EFL) of 75mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for immediate use.

The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring excellent optical performance. The N-BK7, a borosilicate crown glass, is known for its low dispersion and high transmission in the visible spectrum. The N-SF5, a dense flint glass, further reduces dispersion, ensuring the lens accurately focuses light of different wavelengths onto a single point.

The lens features a standard anti-reflection coating, both on the front and back surfaces, specifically designed for the visible light spectrum (edm vis-0 std curve). This coating enhances light transmission, reduces surface reflections, and increases the overall efficiency of the lens.

The lens geometry includes a central thickness of 5mm, with a slight asymmetry towards the edge, resulting in a total thickness of 6.59mm at the lens edge. The lens's inner and outer radii are 0mm, indicating a planar surface. The first and second radii of curvature are 39.61mm and -36.46mm, respectively, while the third radius of curvature is -145.02mm.

This achromatic doublet lens is a multiplet, meaning it consists of multiple optical elements. It is designed for use in various applications that require high-quality imaging or light focusing within the specified visible light spectrum.