BI-CONCAVE LENSES (UNCOATED)

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OPTICS / LENSES / Spherical Bi-Concave Lenses / Bi-Concave Lenses (Uncoated)

The most significant advantage of UVFS is its excellent transparency in the deep ultraviolet (UV) and visible spectral ranges, from approximately 185 nm to 2100 nm. The high purity of UVFS, with a low content of microscopic defects and inclusions, gives it a very high laser-induced damage threshold and extremely low fluorescence levels compared to natural quartz. This allows these lenses to be used with high-energy and high-power lasers without the risk of material damage, ensuring long-term reliability.

UVFS has a very uniform refractive index throughout the material. This exceptional homogeneity ensures minimal wavefront distortion, which is vital for maintaining the quality and profile of a laser beam as it passes through the lens. In addition, UV fused silica has better homogeneity and a lower coefficient of thermal expansion than BK7.
Bi-concave lenses have negative focal lengths and are often used to increase the divergance of a converging beam.

POL-UVFS-BCV SERIES