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How to choose a laser pointer Komentarze (0)
17. kwietnia 2015 09:05:00 a dark spot where careful observation, if the laser spot around the obvious floodlight, indicating failure of the lens;
2.whether it is a perfect spot to observe solid dots;
3.carefully observe whether there will be flickering problem when the laser shot, and if so, explain LD problem.
4.if it is smaller power laser pointer (20 mW or less), the need to observe the brightness of the laser just fired if it will be dark when lit, if this is a circuit description of a laser pointer or LD problem.
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