How to choose a laser pen for the laser pen?

Laser pens are rich in variety and use in many places. They are generally an indication. For example, when you demonstrate some documents, you can use it to focus on the target. The role and price of such products in the market are different. So, what about the laser pen? How to choose? Next, Xiaobian will introduce you to everyone:

        The so-called laser pen refers to a demonstration tool using a laser as an indicator. The range is relatively long, and it can be used instead of the instruction tool such as the pointer, or it can be used as a guide for playing a ppt slide. At present, there are mainly red and green laser pointers on the market. Due to technical and cost constraints, blue and yellow are still rare. When using a laser pointer, the spot can be seen within tens of meters, so the laser pen is often used. Instructions for use. Since the role is different, how to choose a laser pointer?

        How is the laser pen? You can choose according to these points. The quality of the LD (light bulb), the quality of the lens, the quality of the laser crystal, and the power of the laser pen affect the quality of the laser beam. The following points should be noted when selecting: 1. In the darker The place is carefully observed. If there is obvious flooding around the laser point, the lens is not qualified. 2. Observe whether the spot is a perfect solid dot. 3. Carefully observe whether there is a flickering problem when the laser is shot. If this is the case, it means that there is a problem with the LD. 4. If it is a laser pen with less power (20 mW or less), it is necessary to observe whether the brightness of the laser just after it is emitted will be darker and brighter. If this is the case, the circuit of the laser pen or There is a problem with LD.

        The above suggestions can help you to buy a laser pen, but also pay attention to its potential danger, because it is generally not very good, the greater the power, the more harm. Many children are interested in such products and feel very fun. Parents should carefully educate them to avoid some of them. Speaking of this, you now know how to choose a laser pointer. These are all good ideas.