13-499 15mm Dia. S-LAH64 NIR Aspheric Lens; EFL=12mm; NA=0.63 Uncoated

The 13-499 is a high-quality aspheric lens, 15mm in diameter, manufactured by Edmund Optics. This lens is designed for use in the near-infrared (NIR) spectrum, specifically at a wavelength of 780nm. The lens is made from S-LAH64, a material known for its excellent optical properties in the NIR range.

The lens features a high numerical aperture (NA) of 0.63, indicating a wide angle of acceptance for light rays. This makes it suitable for applications that require high light-gathering capabilities. The effective focal length (EFL) of the lens is 12mm, which, combined with its NA, results in a high-resolution optical system.

The lens is uncoated, meaning it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means that the lens is less susceptible to damage from environmental factors, making it suitable for use in harsh environments.

The lens's geometry is precisely engineered, with an inner radius of 0mm, an outer radius of 0mm, and a thickness at the edge of 2.09mm. The aspheric design of the lens helps to correct spherical aberration, a common issue in traditional spherical lenses, resulting in improved image quality.

The lens's front surface has a radius of curvature of 9.32mm, while the back surface is flat. The thickness at the center of the lens is 5.28mm. The lens's front surface has a conic constant of -8.83, indicating a strongly aspheric surface.