13-498 12.5mm Dia. N-BK7 NIR Aspheric Lens; EFL=25mm; NA=0.25 Uncoated

This is a high-quality 13-498 12.5mm Dia. N-BK7 NIR Aspheric Lens, designed for use in the near-infrared spectrum with a wavelength of 780nm. The lens is sourced from the reputable vendor, Edmund Optics, and is available for purchase through their website. The current status indicates that the lens is in stock, ensuring quick delivery for your optical project needs.

The lens is made from N-BK7, a popular borosilicate glass known for its excellent optical properties, including a high refractive index and low dispersion. This makes it an ideal choice for a wide range of applications, particularly in imaging systems and laser applications.

The lens features an aspheric design, which is a type of lens surface that deviates from a spherical shape. This design helps to reduce spherical aberration, a common issue in optical systems, resulting in improved image quality and overall system performance. The lens has a base shape of a circle, with a diameter of 12.5mm.

The lens has a high numerical aperture (NA) of 0.25, which is a measure of the light-gathering ability of the lens. This high NA allows for a larger amount of light to be collected, making it suitable for use in low-light conditions or where high resolution is required.

The lens is uncoated, meaning it does not have any additional layers applied to the surface to enhance its optical properties. While this may result in a slightly lower transmission rate compared to coated lenses, it does offer the advantage of being more cost-effective and simpler to clean and maintain.

The lens has an effective focal length (EFL) of 25mm, which is the distance over which the lens forms a perfect image of a distant object. The lens also has a thickness of 2.43mm at the edge and 4mm at the center.