Laser flashlight is a magical tool, which can illuminate things, barbecue food, point to stars and so on. However, in order to make the laser flashlight really work, the key lies in the balance between power and focusing area. In this paper, the relationship between power, focal area and combustion of laser flashlight will be discussed in depth to help readers better understand this magical tool.

Balance between power and focal area

Whether the laser flashlight can burn things depends on the balance between power and focusing area. The greater the power, the smaller the focus area, and the easier it is to ignite the object. Of course, the melting point and other properties of the burned items also play a certain role.

Laser price

It is easy to buy various lasers on Taobao, including green (532nm), red and infrared lasers. Under the same power, infrared laser is the most affordable, red laser is slightly more expensive, and green laser is the most expensive.

Advantages of green laser

Green laser is more likely to produce a visible beam. So, how powerful is your laser pointer? If it is 1-5mw, I'm afraid it is difficult to burn plastic bags. To achieve this goal, about 30mw green laser is needed. These lasers can not only burn dark plastic, but also light matches and point them at the stars. A more powerful laser can even burn paper.

Effect of 50mw Green Laser

I have a green, 50mw laser at hand, which can ignite the plastic bag and melt the foamed plastic in the range of1.8m. To show its effect, you can try to put the black plastic bag close to the camera flash (within 1cm) and then let the camera flash (be careful, don't look directly! )。 You will immediately find a big smoking hole in the plastic bag.