AL75150-A 75 mm Dia. S-LAH64 High-Precision; CNC Polished Aspheric Lenses; EFL=150 mm; NA=0.23 AR 350-700nm

The AL75150-A is a high-precision aspheric lens, manufactured by Thorlabs, with a diameter of 75 mm and a focal length of 150 mm. This lens is designed for use in the 350-700 nm wavelength range, making it suitable for a wide range of applications in the visible spectrum.

The lens is made from n-BK7 Schott glass, a popular material for optical elements due to its excellent optical properties and chemical resistance. The lens features a high-quality CNC polished surface, ensuring excellent image quality and low scatter.

The asphere of the lens is defined by a series of high-order polynomial coefficients, including k1, k2, a2, a4, a6, a8, and a10. These coefficients allow for the precise control of the lens's surface shape, minimizing spherical aberration and other optical aberrations. The lens has a numerical aperture (NA) of 0.23, providing a wide angle of view and high light-gathering capability.

The lens is coated with a broadband anti-reflection (AR) coating, which reduces reflective losses at the air-glass interfaces. This coating is designed to operate over the entire 350-700 nm wavelength range, ensuring high transmission and low reflectance.

The lens has a thickness of 5.7 mm at the edge and 15 mm at the center. The inner and outer radii are not specified, indicating that the lens has a circular base shape. The lens is available for purchase directly from Thorlabs, and the web link provided in the item data indicates that it is currently in stock.