What is the irradiation range of the laser pointer?
Likewise, when it comes to close targets, the range of the high powered laser pointer may not be that important. However, if you plan to use it in a large space such as a conference center or conference hall, you need to evaluate the scope based on the area of the venue. But the laser pointer has undergone some changes in recent years, some of which may be difficult to figure out. Back then they were like flashlights: one end would be unscrewed, and you would insert a battery (AAA or button battery). They are similar to this laser pointer.
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In the 1990s, the price of red laser pointers dropped sharply. Now you can get a simple keychain model for less than $5 and entertain your cat for less than a plush mouse. More fancy models still exist, but even their prices have dropped. All these laser pointers have one thing in common: they use low-cost red LED diodes that can project a 630nm beam. This is okay, but it is not a very obvious pointer. Today, a decent pen length model can cost from $10 to $30
2021-11-16 09:42:27
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