33-949 25mm Dia. UVFS Aspheric Lens; EFL=17.5mm; NA=0.69 Uncoated

This is the 33-949 model from Edmund Optics, a 25mm Dia. UVFS (Ultra-Violet Fused Silica) Aspheric Lens with a high numerical aperture (NA) of 0.69 and an effective focal length (EFL) of 17.5mm. The lens is uncoated, offering a unique set of properties that make it suitable for specific applications.

The lens is made of syn hpfs7980 corning, a high-performance fused silica material known for its excellent transmission properties in the ultraviolet, visible, and near-infrared regions. This makes the lens ideal for use in UV applications.

The lens geometry is carefully designed with an inner radius of 0mm, an outer radius of 0mm, a diameter of 25mm, and a thickness at the edge of 2.85mm. The EFL of 17.5mm is complemented by a back focal length (BFL) of 8.37mm. The lens shape is aspheric, with specific curvature radii (R1 and R2) and conic constants (K1 and K2) that contribute to its high performance.

The lens has a high numerical aperture (NA) of 0.69, which is a measure of the light-gathering ability of the lens. This high NA makes the lens suitable for high-resolution imaging applications.

The lens is uncoated, which means it does not have any additional layers of material applied to its surface to alter its optical properties. This can be advantageous in certain applications where the uncoated surface is desired.

The lens is currently in stock and available for purchase through the provided weblink.