What Is a Laser Pointer?
A laser pointer is a device that uses a laser to display a point at a target location. Laser pointers depict drawings and other information on the job site and indicate a need to adjust the measurement position.
Since work is performed according to the points indicated by the laser pointer, the correct position must be indicated, so it is necessary to understand how to properly maintain and handle the laser pointer. The principles used to accurately maintain the level and output points divide laser pointers into gimbal and electronic leveling types.
Uses of Laser Pointers
Laser pointers are used on construction sites, electrical work sites, and factory production lines.
On construction sites, laser pointers are used to accurately depict information from target blueprints and drawings on the work site so that the work can proceed correctly.
Laser pointers on the factory production line accurately identify the measurement position by indicating the point with a laser.
When selecting a laser pointer, it is necessary to consider factors such as accuracy, light intensity, and range.
Principle of Laser Pointers
This section describes the principle of operation of laser pointers. A laser pointer consists mainly of a mechanism for remaining horizontal and a device for outputting the laser.
Many products use lasers of class 2, which are visible light lasers with a wavelength of 400~700 nm that are safe even when unintentionally viewed directly for less than a quarter of a second. As for the principle of leveling, there are two types: gimbal type and electronic leveling type, which keep the instrument level to indicate the exact point. The focus of each is explained below.
- Gimbal Type. The gimbal type has a pendulum hanging inside the instrument and uses the pendulum’s orientation toward the center of the earth to keep the instrument level. Its simple structure and easy maintenance characterize it.
- Electronic Leveling Type. The electronic leveling type uses a leveling sensor, which measures the level by detecting the position of air bubbles in the liquid. Periodic maintenance is required, but it is characterized by its low tendency to break down.