Why is there variation in the brightness of the laser projected by laser level?

In the realm of daily usage, numerous consumers may discern a subtle disparity in the brightness of laser beams emitted by a laser level. Typically, this phenomenon is illustrated as depicted in images, where, on 360-degree plane projected by a laser level, the front and rear parts may exhibit a slightly brighter sheen compared to the flanks. When utilizing a cross line laser level, the beams intersecting at the cross point appear marginally brighter than the endpoints of the beams. It is a natural phenomenon rooted in specific scientific principles and technical design.

The light source of the laser level:

A laser level generally consists of one or more laser pointers. The laser of the laser pointers is mainly a laser diode (referred to as LD) or diode-pumped solid state (referred to as DPSS) to produce. Where a laser diode passes through a perfect parabolic mirror to produce a collimated beam with an elliptical cross-section. Diode-pumped solid state produces a collimated beam with a circular cross-section. As the laser diode produces a collimated beam with an elliptical cross-section, under the action of the beam splitter, the long axis will be slightly brighter than the short axis, which is due to the fact that in the elliptical spot beam splitting, the long axis is allocated more spot area than the short axis, so that the long axis of the elliptical spot corresponds to the laser line will be brighter than the corresponding short axis of the laser line. Since laser levels are small and do not require excessive laser power, laser diodes are usually used as lasers, as they are of better quality and reliability than DPSS.

Therefore, when you use the laser level, if you notice that the projected laser light is different, don’t worry, this is a normal optical phenomenon, Huepar laser level in the design of the product also fully considered the impact of the different laser light, so the engineers will be often used by workers in the direction of the allocation of the laser line of the brighter area.

It is hoped that this article aids in enhancing your comprehension of the reasons behind the differing brightness of laser beams emitted by laser levels.