This is the 39-560 model from Edmund Optics, a high precision laser grade aspheric lens designed for use with a wavelength of 1064nm. The lens boasts a diameter of 25.4mm and an effective focal length (EFL) of 50.8mm, making it suitable for a variety of applications.
The lens is made from syn hpfs7980 corning, a material known for its optical quality and durability. The aspheric design of the lens helps to reduce spherical aberration, improving the overall image quality. The lens has a numerical aperture (NA) of 0.25, which determines the light-gathering ability of the lens.
The lens features a laser V-coat, specifically designed for use with a 1064nm wavelength. This coating helps to reduce reflection and increase transmission, improving the efficiency of the lens. The coating is applied to both the front and back surfaces of the lens.
The lens has a thickness of 4.7mm at the edge and 8.36mm at the center. The front and back surfaces of the lens are free from any irregularities, with the front surface having a radius of curvature (R1) of 22.84100014344148mm and the back surface (R2) being flat.
The lens is currently in stock and available for purchase. For more information, please refer to the provided weblink.