Fiber laser cutting machine laser wavelength, laser power and laser brightness and other concepts and relationship analysis:

1. Fiber laser cutting machine laser wavelength, laser power and laser brightness and other concepts

Laser is also an electromagnetic wave, but the wavelength of laser is not in the same order of magnitude as radio waves, it is several orders of magnitude shorter than radio waves. The wavelength unit of laser is usually measured in nm (1/1000000000 meters), and laser can be divided into two categories: visible laser and invisible laser.

According to the different wavelengths, many colors of laser can be divided. The wavelength of visible laser that can be clearly distinguished by the human eye is basically between 400nm and 700nm. The shorter the laser wavelength, the more blue-purple its color is, until ultraviolet, the human eye can't see it; and the longer the wavelength, the more red its color is, until infrared, the human eye can't see it. The human eye is most sensitive to green, orange and yellow light near the wavelength of 550-570nm. Therefore, in the visible light range, the wavelength can be understood as a digital identification of color.

Laser power is the same as electrical energy. The light emitted by the laser is also a kind of energy, but it appears in the form of light. Laser power is a physical dimension that measures the output energy per unit time. The unit of measurement used is the same as electrical power, which is W (watt) or milliwatt (mW).

2. The relationship between the laser wavelength, laser power and laser brightness of the fiber laser cutting machine

Laser brightness is the comprehensive subjective feeling or description of the laser wavelength and laser power by the human eye. To measure the laser brightness, you can only use your own eyes to see whether the laser is bright or not, and how bright it is, you can only draw a conclusion after seeing it with your own eyes. In other words, your eyes are the test instrument for the quantity "laser brightness". It should be noted that the laser brightness will also be different depending on the difference in individual eyes. For example, some people are color blind to the red light with a wavelength of 635nm. Even if they see the dazzling red laser with a wavelength of 635nm, they still feel it is very dark after seeing it, or even cannot see it at all.

The human eye has different visual sensitivities to lasers of different wavelengths, so when talking about "laser brightness", the factor of laser wavelength must be considered. We cannot judge whether one laser light is brighter or dimmer than another based solely on the laser power.