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"World's Largest Digital Photo" Very nice, but I think Google Earth wins that prize by a fair margin = ~ 60 TB as at 2007

;-) Just added my 445 to the Grix list.

Sorry for not posting earlier. Didn't realise the list existed! Daguin's first custom build: Diode - ex Casio projector Driver - Micro boost Lens - 405 G1 Host - Cree (Jayrob 18650 kit) Power (mA) - 650 Power (mW) - 559

LOL. Wish I'd read the FluoView before starting the Hecht book!

To be sure, can you get some measurements every (say) 1 metre from the aperture? If you are showing 5, 5.1, 5.2 etc then you really do have .1 mrad divergence!! OTOH, if you intially get a reducing width, then it's what Aryntha says. Would be interested to know. I don't use my Dilda much, but...

Above my budget, but as a matter of interest, what is it outputting?

I noticed the curved clip too. My viper has a straight clip and no warning label (though that may have been accidentally omitted). To be fair though, the viper as now shown on Dragon's website also has a curved clip and looks exactly like the old WL Nexus which looks exactly like...

Hi Franco Yes as per my sig, I own a 445 Daguin custom built and also a Kryton 405 8x (also Daguin built). I have posted reviews for both lasers in the review section. I'll check out the videos. Are they 405 or 445? David

It is said that people who have had their lens removed (for cataracts) can see into UV, but I don't have a pure or filtered source to test it with.

BTW, welcome back Igor!

From personal experience, 370mw of 405 nm (8x) is a significantly better burner than 570mw of 445. The shorter wavelength of the 405 may have something to do with it (more absorption?) but I am pretty sure the main reason is the rectangular output from the 445 which does not focus as well...

Yes I see what you mean. The pace of scientific progress is truly astounding.

I have the 125mw pulsar in a neat slim chrome pen host. The beam quality is excellent with a nice round spot and low divergence. Power is slightly over-spec at 136mw. It is significantly brighter than my 5mw green. However, the lack of focusing means that it is not much use for burning. I also...

That's on a par with The Dog Ate My Homework ;-) (square or circle won't change the answer by an order of magnitude) No doubt the police will end up buying these things at US$ 10,000 a piece, when you can basically make the same thing by popping a defocusing cap on a 50 dollar dx 100mw. I...

Many thanks for the responses. What's confusing me is that if the entire front of the KTP crystal emits a lasing output from its face, why is the DPSS beam width at the aperture less than the beam width from an LD which has a far smaller emitting area? Surely the smaller the emitting area the...

Hello from North London. We may not be the Land of the Free but at least we can still import high power lasers ;-)

Can anybody answer these questions (or any of them)? 1. Is the beam quality of DPSS lasers better than that of single diode lasers? If so, why? 2. Why did Nichia bother to invent the 405nm diode? Why not just frequency double the output from an 808 LD? 3. What is the size of the laser...

For a standard mirror coating, that isn't so surprising. If you assume 90% reflection then 500W would still get through to the backing which would be enough to burn through thin steel. On the other hand, modern dieletric coatings can reflect 99.99% +. If it were possible to coat a drone with...

A 100mw pen green (no keys or locks) with a fixed focus cap that defuses the beam to about head sized at 20 feet would be quite a good way of distracting an unarmed assailant. WL do a pen cap that would probably do the job. At that distance it would be equivalent of a direct hit by perhaps 0.1...

......IR reflecting mirrored paint ......?