11-720 25.4mm Diameter x 250mm FL; Uncoated; Ultrafast Thin PCX Lens

The 11-720 is a 25.4mm diameter, 250mm focal length Plano-Convex (PCX) lens, sourced from Edmund Optics. This lens, with its Ultrafast Thin design, is an uncoated spherical lens, ideal for applications that do not require anti-reflective coatings.

The lens's geometry includes a 0.9mm thickness at the edge and a 1.6mm thickness at the center. The effective focal length (EFL) is 250mm, and the radius of curvature (R1) is 114.75mm. The back focal length (BFL) is 249.18mm, and both the inner and outer radii are 0mm, indicating a uniform curvature.

The lens is made from UVFS Mal-1965 material, optimized for use at a wavelength of 587.6nm. The lens's shape is spherical, a common choice for its ease of manufacturing and versatility in optical systems. The uncoated nature of the lens makes it suitable for applications where cost-effectiveness and simplicity are prioritized over high transmission and low reflectance.

Please note that the "Ultrafast Thin" designation suggests that this lens is particularly thin, making it suitable for use in systems where space is at a premium. However, it lacks the anti-reflective coatings that would typically enhance its performance in high-transmission applications.

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