In order to make precise and fine enough line projection at long work distance, it makes an efficient job with a Berlinlasers 445nm blue line laser alignment within 50mW to 100mW. It applies a qualified glass coated lens or separate crystal lens, after passing through up to 24 hours beam stability test, it achieves ultra fine and straight blue line projection within 0.5 meter to 6 meters. Only if ultra compact size tube made laser device gets proper installation and adjustment, within freely installed distance of 3 meters, it brings users high level of accuracy line projection at long distance effectively.
https://www.berlinlasers.com/blue-line-laser-alignment
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