LF1988 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-500mm Uncoated

The LF1988 is a spherical lens with a concave-convex base shape and a circular geometry, sourced from the reputable vendor Thorlabs. This lens boasts a diameter of 25.4 mm and a center thickness of 3 mm, with an edge thickness of 3.3 mm. The effective focal length (EFL) of this lens is -500mm, making it a negative meniscus lens.

The lens is crafted from N-BK7, a high-quality optical glass from Schott, which is known for its excellent homogeneity and low auto-fluorescence. The lens's inner and outer radii are 0, and it operates at a wavelength of 587.6 nm. The shape of the lens is spherical, and it does not come with any coating, as indicated by the empty 'coating' field in the item data.

This lens is a versatile optical component, suitable for a wide range of applications. However, its uncoated nature means that it may not perform optimally in environments with high light intensity or where minimal reflection is required. Therefore, it is essential to consider the specific requirements of your application before choosing this lens.