354340 6.325 mm Dia. D-ZK3 Molded Glass Aspheric Lenses; EFL=4 mm; NA=0.64 Uncoated

The 354340 from Thorlabs is a high-quality aspheric lens, designed with precision and performance in mind. This lens boasts a diameter of 6.325 mm and is made from D-ZK3 glass, a popular choice for its excellent optical properties. The lens is uncoated, offering a wide numerical aperture (NA) of 0.64, which allows for a larger light-gathering capacity and increased resolution.

The lens's geometry is meticulously crafted, with an effective focal length (EFL) of 4 mm, providing a compact and efficient optical solution. The inner radius is 0, while the outer radius is also 0, indicating a circular shape. The lens has a thickness of 1.484 mm at the edge and 3.097 mm at the center, ensuring structural integrity and minimal distortion.

The aspheric design of this lens, represented by the coefficients k1, k2, a2, a4, a6, and a8, significantly reduces spherical aberration, providing superior image quality. The front and back surfaces of the lens have different aspheric coefficients, further enhancing its optical performance.

This lens is suitable for use in a wide range of applications, including but not limited to, beam shaping, focusing, and imaging. With its robust design, high-quality materials, and excellent optical properties, the 354340 from Thorlabs is a reliable choice for any optical system.