47-705-INK 18 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=30mm VIS 0° 425-675nm

The 47-705-INK is an 18 mm diameter achromatic doublet lens, designed and manufactured by Edmund Optics. This lens is specifically engineered for visible light applications, with a wavelength range of 425-675nm. The lens boasts an effective focal length (EFL) of 30mm, making it suitable for a wide range of optical systems.

The lens is composed of two elements: N-BAF10 and N-SF10, both from Schott. These materials are known for their high refractive indices and low dispersion, making them ideal for achromatic lenses. The lens features a standard anti-reflection coating on both the front and back surfaces, enhancing its transmission capabilities and reducing unwanted reflections.

The lens geometry is meticulously designed, with a center thickness of 6.91mm and an edge thickness of 6.55mm. The curvature of the lens elements is also precisely controlled, with radii of curvature of 20.73mm for the first surface, -14.31mm for the second surface, and -133.58mm for the third surface. The lens does not have an inner or outer radius, indicating a uniform edge thickness.

This lens is a multiplet, meaning it is composed of multiple elements. Multiplets are often used in optical systems to correct various aberrations, enhancing the overall performance of the system. The 47-705-INK is currently in stock and available for immediate shipping, as indicated by its valid weblink status.