In this post, I would like to tell you about laser beam quality for NICHIA 445nm NUBM44 / NUBM47 laser diode.
We will measure the size and proportions of an emitting spot and a divergence of a laser beam.
Range from the laser to the surface: 95 mm
Range from the emitting spot to the surface: 100 mm
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Laser beam horizontal value: 115 mm
Laser beam vertical value: 17 mm
Proportion horizontal / vertical = 6.75
Horizontal Divergence: 60 degree
Vertical divergence: 9.7 degree [alpha = 2*arctg(17 mm/(2*100 mm)) = 9.7]
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