Demanding Applications Call for Reflective Objectives
Laser systems costs are falling, leading to their increased use in a host of demanding applications from machining to hyperspectral imaging. Often in these cases, a small, diffraction-limited spot size is required. When specifying a microscope objective for this purpose, system designers will typically first consider refractive or transmissive objectives — but there are many good reasons to consider a reflective objective design. The main advantages are achromaticity, high power handling
Photonics Spectra, June 2017