Even so, most resort to reactive maintenance from time to time. Some have a regular preventive maintenance schedule, inspecting the optics and (if needed) cleaning and polishing them at defined intervals. You can look at them and sometimes see if they need to be cleaned, or if they have external damage.” But detecting internal damage, he said, isn’t quite so straightforward.Īs Smith explained, lens cleaning procedures vary throughout the industry. “Focusing lenses, which are common optics that need to be maintained, can be difficult to inspect. “You have internal stresses in the lenses that you cannot see with the naked eye,” Smith said. This past summer it introduced its mini LSA, a lens stress analyzer that clips to, and works with, a smartphone’s camera and flat-panel display. So said Chris Smith, global aftermarket sales manager for II-VI Incorporated, Saxonburg, Pa., a company that has been selling a desktop crossed polarizer for about five years. That’s something we’re trying to change.” “I’d say the majority of operations do not have some type of crossed polarizer in their shop right now. This is a classic case of not having the right tools for the job, like a crossed polarizer that allows a technician to inspect the lens and plainly see the imperfections, or lack thereof. The laser fires up, and, alas, the cutting problem persists. The tech inspects the lens, sees nothing, but replaces it anyway, just in case. The department lead or maintenance tech comes over to troubleshoot. This crossed polarizer works with a smartphone’s polarized flat-panel display to reveal imperfections in laser optics.Īn operator notices part edge quality degrading on certain pieces cut by the CO 2 laser.
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