How do you use optical comparator?

An optical comparator is used for measuring and inspecting the dimensions of a part by projecting its silhouette onto a screen. To use it, place the part on the stage, adjust the light source to illuminate the part, and focus the optical system to project a magnified image onto the viewing screen. You can then compare the projected image against predefined templates or measurement scales to check for accuracy and tolerances. Adjustments can be made based on the measurements obtained for quality control purposes.