System to protect optics against dirty environments

摘要: An optical sensor head has deep, pitched grooves or screw threads in the walls of gas channel, and a flow swirled along to protect optics against atmospheric debris moving particles such as is generated by an industrial process. The are support swirling motion gas. Use increases allowable velocity diverts incoming toward channel walls. windows profiler, for instance, protected smoke weld spatter created metal-inert-gas welding torch.