Aspheric Optics for the Far Infrared Range | |
19 Sep 2016 For most situations, spherical optics are used to focus laser beams. For applications requiring a very short focal length, spherical aberrations can become an issue. Aspheric lenses with at least one free-form surface produced using CNC polishing techniques can greatly reduce this effect. Ideally, aspherical lenses replace a system of several spherical lenses, thereby reducing weight and losses through surface scattering. LASER COMPONENTS offers aspheric lenses for use in the FIR range in the following materials: ZnSe, Ge, Si, CaF2, Cu and Al. For a substrate with diameter 150mm a shape deviation of ½ fringe and a surface roughness is < 30 Å RMS can be achieved. http://www.lasercomponents.com/uk/optics/laser-optics/ir-laser-optics/ |
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