87-988 12.5mm Dia. UVFS Aspheric Lens; EFL=12.5mm; NA=0.5 VIS 425-675nm

The 87-988 is a high-performance aspheric lens, boasting a 12.5mm diameter and a numerical aperture (NA) of 0.5. This lens is designed for use within the visible light spectrum, specifically between 425 and 675 nanometers.

The lens is crafted from UV Fused Silica, a material known for its excellent transparency and durability. This material, also known as syn hpfs7980 corning, ensures the lens can withstand rigorous use while maintaining its optical performance.

The lens's geometry is meticulously designed, with an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 1.98mm. The effective focal length (EFL) is 12.5mm, and the back focal length (BFL) is 8.39mm. The lens's center thickness is 6mm, providing a robust structure for various applications.

The 87-988 lens features an aspheric shape, which is particularly beneficial for imaging applications. This shape helps to reduce spherical aberration, a common issue in traditional spherical lenses. The lens's aspheric surface is defined by the conic constant k1, which is -0.6549125, and higher-order aspheric terms are not present.

The lens is coated with a Visible (VIS) coating, specifically designed for the 425-675nm range. This coating enhances the lens's transmission within this spectrum, reducing unwanted reflections and improving overall light efficiency.

The lens is available from Edmund Optics and is currently in stock, making it an accessible choice for those in need of a high-quality, aspheric lens for visible light applications.