Med-Lite IVThe Medlite IV laser is another type of ND:YAG laser that operates at 532 and 1064 nm as the Gemini. Unlike the Gemini, which operated at longer pulsewidths measured in milliseconds, the Med-Lite IV is a Q-switched laser. Q-switched lasers operate at very short pulse-widths, nanoseconds. This difference in pulse widths results in a different mechanism of ablation of the target. The mechanism of ablation with q-switched lasers is known as photacoustic. It is almost as if a "mini-sonic boom" disrupts the target mechanically. In contrast, the mechanism of ablation with lasers that operate over longer pulsewidths is photothermal. This means that the target is ablated by heat that is generated by the light which is absorbed.
The Med-lite IV can be used with a variety of hand pieces, which enable it to produce laser light at 585 nm and 650 nm in addition to the 532 nm and 1064nm. This laser is very versatile and can be used for many purposes, including the removal of brown spots and tattoos of many colors, the improvement of hypertrophic scarring, and, in some cases, the treatment of unwanted hair, skin blemishes, vessels, and textural changes