89-431 25mm Dia. N-BK7 Hyperbolic Aspheric Lens; EFL=25mm; NA=0.5 Laser V-Coat 532nm

The 89-431 is a high-quality aspheric lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 25mm, is specifically engineered for use with a wavelength of 532nm, making it ideal for applications such as laser systems and other precision optical setups.

The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material ensures high transmittance and low dispersion, making it a popular choice for a wide range of optical applications. The lens features a hyperbolic aspheric design, which provides superior image quality compared to traditional spherical lenses. This design helps to minimize spherical aberration, coma, and other optical aberrations, resulting in a clearer, sharper image.

The lens has an effective focal length (EFL) of 25mm, which is the distance from the lens's principal point to the focal point when the lens is focused at infinity. This EFL, combined with the lens's numerical aperture (NA) of 0.5, provides a wide field of view and high light-gathering capability, making it suitable for use in brightly lit environments or where high resolution is required.

The lens is coated with Edmund Optics' Laser V-Coat, a broadband anti-reflection coating designed for use with 532nm lasers. This coating reduces surface reflections, improving transmission and enhancing the overall performance of the lens. The coating is applied to both the front and back surfaces of the lens, ensuring optimal performance from all angles.