Positive meniscus lenses have a lower radius of curvature on the convex side, higher radius of curvature on the concave side, and are thicker in the middle than on the edges. Our meniscus lenses are precision polished and feature ≤λ/8 surface irregularity. The lenses have high surface quality (20-10 scratch-dig) surface quality, and are made with UV-fused silica to ensure minimal scattering in Nd:YAG laser applications.

UV Grade Fused Silica is synthetic amorphous silicon dioxide of extremely high purity providing maximum transmission from 195 to 2100 nm. This non-crystalline, colorless silica glass combines a very low thermal expansion coefficient with good optical qualities, and excellent transmittance in the ultraviolet region. Transmission and homogeneity exceed those of crystalline quartz without the problems of orientation and temperature instability inherent in the crystalline form. It will not fluoresce under UV light and is resistant to radiation. For high-energy applications, the extreme purity of fused silica eliminates microscopic defect sites that could lead to laser damage.

These singlet lenses are available either uncoated or coated with a choice of laser line V-coating for all of the ND:YAG fundamental and harmonics: 1064, 532, 355, and 266 nm. A standard diameter of 50.8 mm allows for quick, easy mounting in many Newport holders when building experiments or prototypes.

Standard effective focal lengths provide a systematic approach allowing for lenses of different sizes to be interchanged without requiring other changes to your optical system.