This special laser diode system is usually equipped with a 638nm red laser pen. They have a good visible red and can be calibrated with a good beam shape. The working performance of this diode is very good, especially when more than two diodes are combined, we use this diode in professional laser systems. Most Chinese manufacturers cannot use this diode. Change the air with the lens and constantly adjust Shanshan's focal length. It is very powerful, not to melt the target, but to destroy it in an instant. Many industries use this technology to accurately punch holes in a short time. The application of laser also led to the invention of laser pen. It has many uses and can be used in many places.

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