One to five megawatts of laser pointer power
A 5MW green laser pointer will do. The most demanding universal pointing applications are pointing at objects in bright sunlight, such as a daytime tour of city buildings, and pointing at stars at night when you need to see a beam of light in mid-air. For these uses, 5-25 mW should be fine, with a maximum of 50 mW for harsh conditions (high ambient brightness, showing stars to a large crowd). These are class 2 lasers with caution tags. Lasers in the 1 mW to 5 mW range are class3a and carry the "Danger" label. Class 2 laser Pointers with an output power of less than 1 milliwatt but a wavelength of 670 nanometers have low apparent brightness and may not be sufficient for all purposes.
Tags
Material
Many people find it hard to believe that something that looks like a regular flashlight and uses a few AAA batteries could be dangerous. However, it is important to realize that the danger from high powered laser Pointers, while small, is not zero, especially for the type 3 Pointers that could cause the above exposure. For example, limited exposure of 5 mW per blink reflex results in up to a 10% probability of retinal damage. However, even eye exposure below 30 degrees Celsius can temporarily blind the victim and should be avoided. Also, the cheapest lasers don't use infrared filters, which means their power readings are not only incorrect but inaccurate. Because devices without filters emit both visible and invisible light, their power readings are higher than the actual visible light. By using an infrared filter, we can ensure that the beam is intrinsically safe and that you can get an accurate power reading.
2021-12-20 11:53:52
Your Answer: