HIMNL9
0
- Joined
- May 26, 2009
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LOL, no, basically your idea is right ..... it don't matter if the dot is 1mm on the first measure and 10mm on the second, as far as the 10mm one cover entirely the reading area ..... the transferred power is always the same ..... and as far as i know, there are no "special secrets" .....
The only differences can be:
If you are measuring a very low powered laser, the beam too much large can not transfer power efficently enough, so, for lasers like 10 or 15mW, a beam of 4 or 5 mm can be the better ..... for high power lasers, as i said, is matter of not ruin the reading surface, so keep them never focused on the reading element, always keep them covering 50 to 70% of the reading area ..... and with thermopiles, keep the beam more centered as possible, regardless the diameter, cause if you make a measure with the beam of 1mm diameter on the border, and a second measure with the beam of 10mm diameter in the center, you get two different values .....
The only differences can be:
If you are measuring a very low powered laser, the beam too much large can not transfer power efficently enough, so, for lasers like 10 or 15mW, a beam of 4 or 5 mm can be the better ..... for high power lasers, as i said, is matter of not ruin the reading surface, so keep them never focused on the reading element, always keep them covering 50 to 70% of the reading area ..... and with thermopiles, keep the beam more centered as possible, regardless the diameter, cause if you make a measure with the beam of 1mm diameter on the border, and a second measure with the beam of 10mm diameter in the center, you get two different values .....