Multielement lenses are an ideal solution for applications requiring specialized performance and/or a high degree of aberration correction. The CVI Laser Optics line of multielement lenses includes doublets, triplets, and assemblies to fit a wide variety of needs, many of which offer near diffraction limited performance. Our achromats, aplanats and objectives lenses are designed to minimize all sources of wavefront distortion for superior beam quality and minimum focal spot sizes. We carry F-theta lenses for scanning, and compact Galilean design beam expanders operating at wavelengths from the UV through near-infrared.
We also offer shear plate testers for accurate collimation adjustment and visual wavefront analysis.
Some focusing applications require a higher degree of aberration correction than can be achieved using any singlet lens. When correction over larger apertures, several wavelengths, or a wider field of view is needed, it may be necessary to use a multielement lens. Our aplanats are corrected for spherical aberration and coma, resulting in virtually diffraction-limited performance at single wavelengths from the UV through near-infrared. This line includes air-spaced laser doublets, focal-length reducing meniscus lenses, as well as diode laser doublets which can be used for monochromatic light over a broad range of wavelengths simply by adjusting the back focal length.
Our achromats offer a high degree of spherical aberration and coma correction in addition to chromatic aberration correction. They include both cemented and air-spaced constructions of varying surface quality to allow you to find the right balance between performance and cost. Our dual-wavelength achromats are optimized for high power handling and efficiency at 1064/532 nm, 1064/633 nm, or with Ti:sapphire at 800 nm, while the broadband achromats are best suited to low to medium power applications over the visible wavelength range.
Applications working at lower f/numbers will benefit from our achromatic and aplanatic objective lenses. These are offered at a variety of numerical apertures for applications in the near-ultraviolet, visible and near-infrared. F-theta lenses, in contrast, provide a flat image plane and linear scanning for use with XY galvanometers. Our F-theta lenses for 1064 nm offer high damage threshold, small and uniform spot size over the entire scan field as well as high scan linearity.
Multielement assemblies can also be used to increase or decrease a beam diameter. CVI Laser Optics offers a range of adjustable laser beam expanders constructed using a compact Galilean design for use at low to high power at wavelengths in the UV, visible, and near-infrared. These are available at expansion ratios up to 20x with a variety of apertures and wavefront quality specifications.
Shear plate collimation testers complete this product line, giving you the ability to accurately and visually characterize wavefront quality using interferometry. The high quality wedged optical flat used in our assembly can be used to set the divergence/convergence of a laser collimating system to less than 20 µrad. It can also be used to measure wavefront radius of curvature, determine wavefront symmetry, or measure the power of long focal length optics.
Though our multielement lens product line includes a wide range of products and performance off the shelf, it by no means defines our limits. Please contact our technical staff to discuss your application and create a solution perfectly matched to your needs.