16-987 40mm Dia. N-SF5 Precision Aspheric Lens; EFL=30mm; NA=0.66 NIR-Plus 600-1050nm

The 16-987 is a high-precision aspheric lens, designed and manufactured by Edmund Optics. This lens boasts a 40mm diameter and a 0.66 numerical aperture (NA), making it suitable for a wide range of applications, particularly in the near-infrared (NIR) spectrum of 600-1050nm.

The lens is made from N-SF5 Schott, a high-refractive index glass that is known for its excellent optical properties. This material allows the lens to achieve a high NA, thereby enabling it to collect and focus light more effectively. The aspheric design of the lens further enhances its optical performance by reducing spherical aberration, a common issue in traditional spherical lenses.

The lens has an effective focal length (EFL) of 30mm, which is the distance from the lens's principal point to its focal point. This EFL, combined with the lens's high NA, results in a narrow depth of field, making it ideal for applications that require high resolution and precision, such as microscopy and imaging.

The lens is coated with Edmund Optics' NIR-Plus 600-1050nm coating, which is specifically designed to enhance the lens's performance in the NIR spectrum. This coating reduces surface reflections, thereby improving light transmission and image quality.

The lens has a thickness of 8.83mm at the edge and 20mm at the center. The front and back surfaces of the lens are coated with the same NIR-Plus 600-1050nm coating, ensuring optimal performance from both sides.