ACL7560U-A ø75 mm Aspheric Condenser Lens; f=60 mm, NA=0.61 AR 350-700nm

The ACL7560U-A is a high-quality ø75 mm Aspheric Condenser Lens offered by Thorlabs. This lens boasts a focal length of 60 mm and a numerical aperture (NA) of 0.61, making it ideal for a wide range of applications. The lens is made from b270 Schott glass, a popular choice for its excellent optical properties and durability.

The ACL7560U-A features an aspheric design, which provides superior optical performance compared to traditional spherical lenses. This design helps to reduce spherical aberration, coma, and other optical aberrations, resulting in sharper images and improved light transmission. The lens has a clear aperture of 75 mm and a thickness of 2.3 mm at the edge, ensuring excellent light gathering capabilities.

The lens is coated with a broadband anti-reflection coating, specifically designed for the 350-700nm range. This coating reduces surface reflections, thereby improving light transmission and enhancing the overall performance of the lens. The coating is applied to both the front and back surfaces of the lens.

The lens is 40 mm from the front focal point to the back surface (BFL), and the center thickness is 30 mm. The lens has a conic constant of -1.911 and a series of aspheric coefficients (a2, a4, a6, a8, a10, a12, a14, a16) for both the front and back surfaces. These coefficients are used in the design and manufacturing process to ensure the lens meets the specified optical performance.