LFB00400 4 mm Dia. Quartz Ball Lenses Uncoated

The LFB00400 is a 4 mm diameter ball lens, sourced from Knight Optical, designed for use in UV, visible, and NIR applications. This uncoated ball lens boasts a base shape of a perfect circle, ensuring excellent light transmission and minimal distortion.

The lens has an effective focal length (EFL) of 2.84 mm, calculated based on the diameter and refractive index of the material. This EFL is crucial in determining the lens's magnification and overall optical performance. The lens's geometry is devoid of any inner or outer radius, further emphasizing its spherical symmetry.

The material of this ball lens is quartz (SiO2), a popular choice in optical systems due to its high transparency across a wide spectral range, from UV to NIR. The uncoated surface ensures minimal reflection, making it suitable for applications where high transmission is required.

The wavelength specified for this lens is 587.6 nm, which falls within the visible spectrum. However, the lens's broadband transparency makes it compatible with a wide range of wavelengths, extending its utility in various optical systems.