A laser lens is needed to condense the light from a wide pattern to a thin beam. This concentrates the energy of your laser. This concentrated beam is what allows you to burn things with your laser. Glass lenses are better than plastic lenses, but they are more expensive. Adjust the lens to concentrate the beam when you are using the laser. This will make the beam powerful enough to burn through some materials and ignite matches or paper. Be very careful when using this laser. Do not point it at anyone or anything that does not belong to you. The laser is very dangerous when focused. It is a crime to point the laser at aircraft and/or motor vehicles. Adjust the beam so that the laser is spread out. This will make the laser less powerful when hitting any one spot. This is the safest way to store the laser in case it accidentally gets turned on. Keep in mind that the laser can still be dangerous, however. It should never be within reach of children.
Obtain a laser lens. Concentrate the beam. Widen the beam when you are finished.