47-640-INK 25 mm Dia. N-SK11/N-SF5 Achromatic Doublet; EFL=85mm VIS 0° 425-675nm

The 47-640-INK is a high-quality Achromatic Doublet Lens, boasting a 25 mm diameter and an effective focal length (EFL) of 85mm, specifically designed for the visible spectrum (425-675nm). This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website.

The lens is constructed from two types of Schott glass, N-SK11 and N-SF5, which are carefully selected to minimize chromatic aberration, a common issue in lens systems. The front and back surfaces of the lens are coated with EDM VIS-0 standard curve coatings, enhancing its light transmission capabilities and overall performance.

The lens geometry is meticulously designed, with a thickness of 6.05mm at the edge, a center thickness of 5.01mm, and a thickness of 3mm at the center a. The lens features three radii of curvature: r1 at 55.68mm, r2 at -38.37mm, and r3 at -146.45mm. The inner and outer radii are both zero, indicating a circular shape.

This lens is a Multiplet, a type of lens system composed of multiple elements. The multiplet design enhances the lens's optical performance, making it suitable for a wide range of applications. The 47-640-INK is currently in stock, ready for immediate purchase and use in your optical system.