Valdair
0
- Joined
- May 29, 2015
- Messages
- 9
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A few weeks ago, after reading around to find a reasonably priced, trusted manufacturer, I purchased this 445nm 2000mW laser from JetLasers. It arrived yesterday. I did some testing at the lab I work in to check its power and get an idea of the heat it was producing to work out a duty cycle (it's huge and metal, so a few minutes at a time don't seem to be a problem for it). Runs about 2200mW most of the time, 2300mW peak. This was to be expected, judging from a lot of the posts I read here.
Another feature of this laser, which I'm sure is quite common, is an internal focus on the lens end of the device. This functioned fine and serves to produce a very concentrated spot anywhere from ~1" from the lens to infinity. However, today while showing the laser to my girlfriend for the first time in my garage, I turned the focus to its minimum focusing distance (fully CCW), and tried some burning. When I went to adjust it back later to do some beam divergence testing, the focus was locked. I've tried everything to move it. Three people have tried rotating it and all failed. I marred the metal pretty significantly trying to use a wrench (through fabric) on it and it still did not budge.
This can't be a little hiccup, this is to be mechanically built into the laser somehow, but I cannot find any documentation on it, nor can I find anyone else that has ever had this issue. It persists at all orientations and regardless of whether the laser is on or off, safety interlock is engaged or disengaged, or whether the aperture cap is on or off (roommate's suggestion). I emailed JetLasers but haven't heard back from them. I'm at a loss here. I come to you for your ideas and possible recommendations.
Another feature of this laser, which I'm sure is quite common, is an internal focus on the lens end of the device. This functioned fine and serves to produce a very concentrated spot anywhere from ~1" from the lens to infinity. However, today while showing the laser to my girlfriend for the first time in my garage, I turned the focus to its minimum focusing distance (fully CCW), and tried some burning. When I went to adjust it back later to do some beam divergence testing, the focus was locked. I've tried everything to move it. Three people have tried rotating it and all failed. I marred the metal pretty significantly trying to use a wrench (through fabric) on it and it still did not budge.
This can't be a little hiccup, this is to be mechanically built into the laser somehow, but I cannot find any documentation on it, nor can I find anyone else that has ever had this issue. It persists at all orientations and regardless of whether the laser is on or off, safety interlock is engaged or disengaged, or whether the aperture cap is on or off (roommate's suggestion). I emailed JetLasers but haven't heard back from them. I'm at a loss here. I come to you for your ideas and possible recommendations.
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