1 results about "Periodic testing" patented technology

This invention provides a universal master grating periodic testing fixture, including a fixing plate. The top surface of the fixing plate has a fixing groove for placing the grating master. The bottom surface of the fixing groove has multiple sliding through holes arranged at intervals. Each sliding through hole contains a sliding component. By changing the position of the sliding components in each sliding through hole, the edge areas of grating masters of different shapes and sizes can be engaged. In other words, using this universal master grating periodic testing fixture, periodic testing of master gratings of different shapes and sizes can be achieved, reducing testing costs, improving testing efficiency, and avoiding the accumulation of master grating periodic testing fixtures.