High performance air-spaced laser aplanat; single wavelengths from 425 – 1600 nm. Designed to produce the minimum focal spot size, these N-SF11 air-spaced doublets exhibit essentially diffraction limited performances over their full f/5 apertures. They are available with a range of high performance AR coatings for use with medium to high power monochromatic light at visible and near-infrared wavelengths.

Visible laser aplanats are corrected for spherical aberration and coma at a single wavelength, offering essentially diffraction-limited performance over their full f/5 aperture at visible and near-infrared wavelengths.  The air-spaced design is composed of two high quality N-SF11 lenses with low loss durable antireflection coatings, suitable for use at medium to high power.  Applications include nonlinear optics, laser beam expansion and collimation, interferometers, beam handling systems, material ablation and cutting systems, and power fiber optic interfacing.  Aplanats are capable of maintaining image quality throughout the beam path, which is critical in imaging of optical traps.  They are also used widely with fiber lasers in material processing and research due to their ability to generate more tightly focused beams, higher energy at the work surface, sharper images for marking, and finer cuts for micromachining.  Though ideal for general purpose use in the visible and near-IR regions to focus collimated monochromatic laser beams, we recommend use of our fused silica LAPQ laser aplanats for applications in the UV or at energies exceeding 4 J/cm2.  Parts are marked with an arrow on the barrel that points to the collimated light.  LAP lenses can be used in combination with their companion APM meniscus lens to create a combined system of f/3.3 relative aperture without introducing additional coma or spherical aberration.
• Diffraction limited performance for a single wavelength
• Transmitted wavefront distortion is < λ/4 over 95% of clear aperture at 633 nm
• Mounts easily onto post with 8-32 and M4 x 0.7 tap
• Available with a choice of high quality V-coat or broadband AR coatings at wavelengths from 425 - 1600 nm
• Standard focal lengths from 25 - 500 mm