The Safety of Laser Distance Sensor

The rapid development of laser technology has led to the technological innovation in the field of laser distance sensor. Laser ranging sensor uses laser as the main working material. At present, the main laser measurement materials on the market are: the working wavelength of 905nm and 1540nm semiconductor laser and the working wavelength of 1064nm YAG laser. What is the international regulation on the safety of laser equipment? The Food and Drug Administration (FDA) classifies laser devices into six classes based on the size of their laser output: ClassⅠ, Class ⅱA, ClassⅡ, ClassⅢa, ClassⅢb and ClassⅣ.

Class I: Low output invisible laser (power less than 0.4mW) does not exceed MPE value for eyes and skin under any condition, even after focusing through optical system. Can ensure the safety of the design, without special management. Typical applications include laser Pointers, CD players, CD-ROM equipment, geological exploration equipment and laboratory analytical instruments.

Class II: Low output visual laser (power 0.4mW-1mW), the reaction time of eye closure is 0.25 seconds, using this time to calculate the exposure can not exceed the MPE value. Usually, the laser below 1mW will cause dizziness and can’t think. It can’t be said that it is completely safe to close the eyes for protection. Therefore, do not observe directly in the beam, do not use the Class II laser to illuminate other people’s eyes directly, and avoid observing Class II laser with far-sight equipment. Typical applications include classroom demonstrations, laser Pointers, sighting equipment and rangefinders.

Only two types of lasers are cited here because Seakeda’s ranging sensor products mainly use laser Class I and Class II as working materials. The laser wavelength is 620~690nm and the power <0.4mW and <1mW. Its high safety, good performance, more energy saving. So you can safely choose our laser range sensor.

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