Many module factories will focus laser diodes into point light sources, so do you know what their main uses are? Let's take a look at it together.

Ranging measurement, one of the most classic uses of laser point light source is ranging measurement. The point light source is directly aimed at the light receiver in the TO tube shell, and there is no pressure when measuring tens of meters. Typical scenes are industrial rangefinder, laser ruler, range finder of warehouse stacker, outdoor ranging telescope and automatic door sensor. These scenes rely on the characteristics of point light source "concentration, accuracy and non-divergence".

laser positioning

Many people think that laser levels is "the laser directly turns into a line".

Actually, it's not. Most of them are laser point light sources, which are combined with cylindrical mirrors and diffractive lenses to spread the points into lines.

Point light source itself is used for: site positioning, carpentry marking, decoration to find vertical points, mechanical equipment alignment.

Biological detection, such as 405nm, 450nm and 520nm low-power point light sources, is commonly used in fluorescence excitation, micro spectrometer, liquid turbidity detection, PM2.5 dust detection (780nm infrared) and oximeter.

Standing components for optical experiments and scientific research

Some light path verification, diffraction experiments and interference experiments are done in the laboratory, and all of them use point light sources.

For example: double-slit interference experiment, diffraction experiment, optical platform alignment and lens group debugging.

You just have to imagine a small red dot on the optical platform, which is a typical point light source.

The above is the common use of laser diode point light source. I hope you will have a clear understanding after reading it.