49-590 25mm Dia. UVFS Aspheric Lens; EFL=30mm; NA=0.42 VIS 425-675nm

This is a high-quality 25mm diameter aspheric lens, designed for use in the visible light spectrum, specifically between 425 and 675nm. The lens is sourced from Edmund Optics, a renowned vendor known for their precision optical components.

The lens is made from UV fused silica, a material with a high transmission range and excellent thermal stability. This makes it ideal for applications that require high precision and durability. The lens has a numerical aperture (NA) of 0.42, which is a measure of the light-gathering ability of the lens. A higher NA allows for greater light collection, which can be beneficial in many applications.

The lens has an effective focal length (EFL) of 30mm, which is the distance over which the lens forms a parallel beam of light. This is an important factor to consider when selecting a lens, as it directly impacts the field of view and the magnification of the system.

The lens also features a unique aspheric design, which allows for superior image quality compared to traditional spherical lenses. This is achieved by using a complex surface profile that reduces spherical aberration, a common issue in optical systems. The result is a lens that provides sharper images with less distortion, even at wide apertures.

The lens is coated with a broadband anti-reflection coating, specifically designed for the visible light spectrum. This coating reduces unwanted reflections, improving the overall transmission of the lens and reducing ghosting and flare.