Green vs red laser Pointer Which is better?
About 600 nanometers, mature technology, and mature semiconductor process materials. And the green laser wavelength is about 530nm, the current semiconductor laser technology in this band is not very mature, so the price of green laser pen is expensive, low power. Generally speaking, the difference is the process, power (brightness), color is not the same. As for blue, I think we have a finished product, but it's definitely not cheap, let alone yellow. These are closely related to material development, and before material development reaches that level, there will be no blue and green lasers. The wavelength of green light is 520nm-532nm, which is just in the most sensitive band range of the human eye, so the same power of green light and other colors of the laser will feel brighter, so it will feel farther.
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The wavelength of red light is 650-660nm. The wavelength of green light is 532nm. The shorter the wavelength, the higher the energy, the more visible the green light will be than the red light, which is why green light is usually chosen for astronomical indications or outdoor guidance. In addition, due to the strong green light power, more attention should be paid to the safety of the product in the process of use. Due to the differences between green laser Pointers and green laser pointer in manufacturing technology, manufacturing materials and technology maturity, the market price gap is caused. (mainly reflected in the frequency doubling conversion technology needed to emit green light, the corresponding conversion crystal cost will be higher), for laser, the same spot size, the divergence Angle is proportional to the wavelength, that is, the same spot size (beam waist size), the wavelength of red light is longer than that of green light, the divergence Angle is also larger. So in this case, for the same distance, the green light has a smaller spot, so it can travel further.
2021-12-08 11:40:30
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