In the last issue, it was said that 650nm laser diodes are widely used in daily life. In fact, relatively speaking, 780nm laser diodes are also seen in industrialized products. Do you know what are the specific ones?
Optical storage field
VCD, CD Walkman, old car CD player, home DVD player, where the reading and writing laser heads are almost 780nm.
Infrared imaging and optical experiment
780nm has almost entered the near infrared region. For the human body:
It seems that the brightness is not obvious, but the photoelectric device responds well.
Therefore, it will be used in many laboratory interference experiments, school optical teaching equipment, spectral testing, CCD/CMOS imaging calibration.
Medical Testing and Life Science Research
780nm is adopted by many biological detection fields, such as:
Blood oxygen saturation measurement
Near infrared brain functional imaging
Tissue penetration photoelectric detection
Auxiliary laser of laser confocal microscope
It penetrates deeper than red light, but it is not as easy to heat tissues as 980nm, so it is a mild medical detection band.
The above-mentioned categories are the common uses of 780nm laser diodes. I hope you will have a clear understanding after reading them.