mainly reflected in the following:
Wavelength and Characteristics:
850nm: It is within the infrared spectrum and has a shorter wavelength. The 850nm solution has the best water vapor penetration among mainstream technology paths, but its maximum power is limited, resulting in a shorter detection distance. For instance, Ouster's OS1 product has a maximum detection distance of 120 meters, which is shorter than the industry average of 200 meters. However, due to its shorter wavelength, 850nm lasers are less likely to be absorbed by water vapor in the air, improving the reliability of autonomous driving in humid environments.
905nm: Also within the infrared spectrum, but with a longer wavelength compared to 850nm. Currently, the wavelength of most mainstream LiDAR products is 905nm, mainly due to the low manufacturing cost advantages brought by the high technical maturity of the 905nm solution. The 905nm light wavelength is often used in specific optical applications, especially in laser technology, such as LiDAR, laser rangefinders, laser communications, and other fields.Laser Distance Sensor
Safety and Detection Distance:
850nm: Due to the limitation of maximum power, its effective detection distance is relatively short. However, because its wavelength is shorter, the laser is less likely to be absorbed by water vapor in the air, resulting in better reliability in humid environments Laser Ranging Sensor.
905nm: Widely used in various scenarios due to its high technical maturity and low cost. However, it's essential to consider the safety of human eyes when using it, as lasers in the 400-1400nm range can penetrate the vitreous body and focus on the retina, potentially causing harm to the eyes.
Applications and Cost:
850nm: Often used in scenarios requiring high water vapor penetration, such as autonomous driving in humid environments. However, due to its shorter detection distance, it may not be suitable for all scenarios.
905nm: Widely used in various fields requiring laser technology, such as LiDAR and rangefinders, due to its low cost and technical maturity long range laser module.
Material Compatibility:
There is no significant difference in material compatibility between the two, but in certain specific applications, the effect of wavelength on materials may need to be considered.
In summary, 850nm and 905nm differ significantly in terms of wavelength, characteristics, safety, detection distance, applications, and cost. When choosing which wavelength laser to use, it is necessary to weigh the specific application scenarios and requirements.
