16-959 25mm Dia. N-BK7 Precision Aspheric Lens; EFL=31.25mm; NA=0.4 VIS-EXT Plus 350-700nm

This is a high-precision aspheric lens, catalog number 16-959, offered by Edmund Optics. It is designed for use in the visible light spectrum, specifically between 350 and 700nm. The lens is made from N-BK7, a popular optical glass known for its excellent transparency and low auto-fluorescence.

The lens has a diameter of 25mm and a numerical aperture (NA) of 0.4. The NA is a measure of the light-gathering ability of the lens and its ability to resolve fine details. A higher NA allows for a greater depth of field and a higher resolution, making this lens suitable for a wide range of applications.

The lens has an effective focal length (EFL) of 31.25mm. The EFL is the distance from the lens at which an object will be in focus. This information is crucial when designing optical systems as it determines the placement and configuration of other optical elements.

The lens features an aspheric surface, which is a type of surface profile that deviates from a simple sphere or cylinder. Aspheric lenses are used to reduce spherical aberration and other optical aberrations, resulting in sharper images and improved performance.

The lens is coated with Edmund Optics' VIS-EXT Plus coating, which is designed for use in the 350-700nm range. This coating enhances the lens's transmission and reduces reflection, improving its overall performance in the visible light spectrum.

According to the vendor, this item is currently in stock and more information can be found on the Edmund Optics website using the provided weblink.