Cutting

(Lower left) A laser makes a hole in a material. (Upper left) The fluence of the laser is measured. (Lower right) Measurements of the fluence and the hole depth are superimposed. (Upper right) The relationship between these measurements is then determined so that hole depth can be calculated based solely on the fluence. (Image: Sakurai et al.)

Researchers devise low-cost process monitoring technique

The method was developed using a laser microscope and a Raspberry Pi Camera

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