Recent content by davidgdg

I did a post on this a while back. See here. David

I did a short guide a while back for new users, covering topics such as when you do / don't need to use goggles. You might find it helpful. It took me a while to work this stuff out: http://laserpointerforums.com/f53/general-safety-help-51877.html#post721040 David

I'm sorry but a five year prison sentence for shining what is basically a bright light at a plane half a mile away or more, is utterly ridiculous. I'm not condoning it, but a sense of proportion wouldn't be amis.

I'm sure it would be possible, but if the beam were moving rapidly around then the exposure would be very brief indeed (perhaps a few milliseconds). This is one reason why quite high powered lasers in discos still don't cause eye damage. Also of course, a small superficial retinal burn would...

A couple of points: 1. The injuries were actually minor and his vision subsequently recovered almost to normal. The report states that after four months, the boy's vision had improved to 20/32 in the right eye and to 20/25 in his left. This is virtually normal vision. 2. I have my doubts...

Currently there are no laws against the importation or sale of lasers into or in the UK, though over zealous customs officials have occasionally detained imports of large consignments under more general laws. For personal importation there is no problem. David

You mean 405?

If you look at the first sticky (the 12x thread) you will see this has already been done. Look at Francorob's table on page 1. The highest so far is 890mw (current unknown) and 885 mw running at 605 ma. As others have pointed out, BR diodes produce 405 nm. Indeed for all practical purposes...

"do experiments with, review or shine at things in the distance/play with -- they're all unique to lasers. But burning things?" Your point is, I think, that burning with lasers is of no interest because unlike the other things you mention, burning is not unique to lasers. But of course it is...

I propose that the word "purple" be banned from LPF unless it is being used to discuss rock music from the 1970s.

Bigger maybe, better I doubt it. I have quite a few greens from 5mw up to 500mw but my DL 125mw is easily my favourite. The output is closer to 175mw, the beam is pinpoint and the pen form is stylish and much more convenient than the larger portables. My 500mw DX produces a brighter spot, but...

The spec sheet does not say, but Frank advised it was DPSS. From an email he sent me: "The beam specs are correct because unlike just about all red lasers that are diode lasers, this laser is a red DPSS laser...."

I don't think this laser has been reviewed before. It's a 100mw 640 nm DPSS handheld from Dragon Lasers. I was curious about this laser because I have been looking for a while for a shorter wavelength red with good beam specs. Unfortunately all the high powered 635s are multimode with horrible...

Was the cap on when you got the eye shot? How subjectively bright did it seem? David

A quick update on my PGL-3C-473 50mw. This was bought on a GB in the middle of last year. Was putting out 120mw on arrival from Glenn but had to go back to CNI (via Glenn) as there was a contact fault. They repaired it and back it came a few weeks later. But after it arrived back, the end...