What does NOHD stand for in laser safety?

The term NOHD stands for Nominal Ocular Hazard Distance. This is a critical concept in laser safety as it defines the distance from a laser source at which the accessibility to the laser beam poses a significant risk of eye damage for an observer. Understanding and applying this distance is essential for ensuring proper safety measures are in place when using lasers, especially in settings where there is potential exposure to the laser beam.

When a beam exceeds the NOHD, there is a high likelihood that an individual could sustain an eye injury if they were to look directly at the laser during its operation. Therefore, establishing the NOHD helps in determining safe operating distances and in designing areas where lasers are used to minimize accidental exposure. This knowledge is vital for anyone involved in laser operations, particularly for safety officers and personnel responsible for implementing safety protocols.