17-418 25mm Dia. N-SF6 Precision NIR Aspheric Lens; EFL=15mm; NA=0.83 Uncoated

The 17-418 is a high-performance aspheric lens designed for use in the near-infrared (NIR) spectrum, specifically at a wavelength of 1550nm. This lens is manufactured by Edmund Optics, a leading provider of optical components, and is available for purchase through their website.

The lens features a 25mm diameter and a numerical aperture (NA) of 0.83, making it suitable for applications that require high light-gathering capabilities and a wide field of view. The aspheric design of the lens helps to minimize spherical aberration, resulting in improved image quality and resolution.

The lens is made from N-SF6 Schott glass, a material known for its excellent optical properties in the NIR spectrum. This glass is uncoated, which means that it does not have any additional layers applied to enhance its optical performance or protect it from environmental factors. However, uncoated lenses can be more susceptible to damage from dust, moisture, and other contaminants, so they may require more frequent cleaning and maintenance.

The geometry of the lens includes an inner radius of 0mm, an outer radius of 0mm, a thickness at the edge of 2.35mm, and a thickness at the center of 10mm. The effective focal length (EFL) of the lens is 15mm, and its back focal length (BFL) is 8.67mm. The lens also has a high refractive index, which contributes to its high NA and light-gathering capabilities.