This is a high-precision asperic lens from Edmund Optics, with the catalog number 16-958. It is designed for use in the visible light spectrum, specifically between 350 and 700nm. The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties.
The lens has a diameter of 25mm and a numerical aperture (NA) of 0.33. The effective focal length (EFL) is 37.5mm, making it suitable for a variety of optical applications. The lens is coated with Edmund Optics' VIS-EXT Plus coating, which is designed to enhance transmission in the specified wavelength range.
The lens geometry includes an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 5.49mm. The thickness at the center is 9.72mm. The aspheric surface is defined by a conic constant of -0.6698934 and a sagitta of 0 for a point at a distance of 0mm from the lens axis.
The coating on both the front and back surfaces of the lens is Edmund Optics' VIS-EXT Plus coating, which is designed to enhance transmission in the specified wavelength range. The lens is currently in stock and available for purchase through the provided weblink.