If the product size is very small, it can be detected by laser. The inspection method shown in the following figure requires two tests: first, put the unpainted product on it, let the instrument set to zero, and then test it again after painting, then the bandwidth of the intermediate laser will change, and this change is the thickness you want. But there is a problem with this: when the product needs to be dried after painting, it is ok. Will the thickness of the product change after baking? Without considering the product deformation, such equipment will not exceed100000. If the product is transparent, there is a way to measure it, but the cost of the instrument will be higher, and 300 thousand is not enough.
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