What is the difference between the table glass of the exposure machine and ordinary glass? Why is the reflector of the exposure lamp uneven with pits and bumps?

Answer: The table glass of the exposure machine does not refract light when it passes through. If the reflector of the exposure lamp is flat and smooth, when light shines on it, according to the principle of light, it forms only one reflected ray that shines on the board to be exposed. If it is uneven with pits and bumps, according to the principle of light, the light shining on the pits and the light shining on the bumps will form countless scattered rays, creating irregular yet uniform illumination on the board to be exposed, improving the exposure effect.