Originally Posted by
laserworld-ag
@soforene: no, I simply say we measure different things, the power at the laser, not after optics. BTW, with larger lasers we get a measurement protocol, and we get the same readings, so I don' think we're off that far. As is not to be expected, as our meters are calibrated regularly at Coherent.
We also do measurements after all optics, and they are lower, as I guess everyone would have expected. Blame it on our optics (the worst in the world, as it was so nicely put here), or on the setup, or whatever. So the cheaper lasers have worse optics. As a competitor I would be glad for that. If it was the other way round, well, I guess I would feel uncomfortable if the competition would build better products for less.
It is claimed, that for this price there should be better optics. Just help our marketing department - up to what price would it be OK to use the cheaper optics?
And yes, with the red there is a loss through the size of the beam. We would be glad if there were red diodes at that price and power with better beam characteristics. We always point the problems with those lasers to our customers, but nevertheless people want to buy those. With our higher priced lasers we use different diodes with better beam characteristics. With those we need less red power to get balanced white. Because the losses are smaller. It's on our website, for all to see.
But why aren't those things pointed out? Because claiming fraud reads better? If the claim is, that we sell underpowered diodes (with blacked out power labels), then take the measurements at the diode, it should be easy to prove the diodes are underpowered, don't it? And with an open projector it is really not that much more complex to take the measurement at the diode.
There are mostly two theories on why we can sell cheap laser. One is that they are in fact underpowered. The other is we "tune up" the lasers, so they get enough power, but reducing the life time. It's hard to see how both can be true.
We can sell cheap, because we sell in large numbers. Some 10,000s projectors of all sizes per year. And, no, I don't think that we are the only ones who can do measurements while all others are stupid. Just as I wouldn't say, that those 10,000 users are stupid, and not able to see that they are using underpowered lasers. I'm just saying we are measuring different things.
Oh, by the way, regarding the blacked out labels on the laser, if you buy lasers in larger numbers in China, lets say of 200mW lasers, they will have, for example, 200-250mW with a label stating something like >50mW. Unfortunately some people don't understand the meaning of the ">" sign. When we asked to change this - they were blacked out. You got to love them for their simple solutions.