Search results

Just noticed this thread - it doesn't have much to do with fluorescent minerals and my Blu-Ray (as folks may have noticed I'm not really an advanced laserist - just a rockhound - so don't have a lot to add in the world of lasers). But somewhere in my memory a thought crept out about anodizing. I...

Which would offer the least light reduction - a line grating or a line optic? Anyone know?

AHA - I found the other gratings.... Didn't notice the scroll buttons in the category box. This one (DG Double) looks quite interesting - I think I'll order one. They say they're made out of glass - a plus for 405nm I think. Not sure which is bigger - the X-Series or Alpha Series. Since my host...

I saw those Nova gratings, but wasn't sure how to use them. THere doesn't appear to be a lot of detail on the web site - i.e., how big are they? How far from the diode must they be mounted, etc. Right now I defocus my dot to about the size of a nickel for a broader beam sweep - cover as much...

The ideal world - 4 or 5 SW laser diodes on the end of a wire in one of these tiny hosts you guys use... But alas, that's a long ways off. But the idea of 4 Blu-Ray diodes in a host similar to the one I am using now has struck me. For me in the field this LW diode is really advantageous. Be...

CC - the unit you are considering is ok, but...  I guess in the lingo of this board it would be sort of like buying one of those red laser pointers sold by hundreds of companies for $5.  You would tire quickly and yearn for something with a little power (like a 200mw cannon).   UV dissapates...

CC - After Greenland, Canada is my next favorite country for FL minerals.  The vast areas in the north middle and west are virtually unexplored - lemme know if you find anything??? You need a SW lamp!! Scopeguy - great UV shot!  Is that a Nichia 365nm LED (the 2w model?)

Glad y'all are enjoying it!  But it's such a pity that we're gonna have all these blind scorpions running around now!  ;) CC - calcite is quite unpredictable in its glow; I wish you luck!  When you say up north, perhaps you mean Canada?  (wiating for the snow to melt, etc)  If so, there are...

Hi CC Yep - 405nm ain't even UV!  It's close to longwave, but not quite there (has to be under 400nm to qualify).  But it's so bright (and close) that it causes things to FL anway.  Greenland minerals are especially reactive to even just blue light, so they glow like a banshee with the 405nm LD...

Dark Horse - Hoya camera filters on Ebay usually are not the "black glass" but merely UV protection filters. A new Hoya UV *pass* filter runs $200+ - these filters are very expensive. Occasionally you can find "transilluminators" on Ebay which have Hoya filter glass (a very big sheet) but the...

Ordinary blacklights generate 350nm to 375nm UV (like this one listed on Ebay: http://cgi.ebay.com/BLAZING-BLACKLIGHT-6-INCH-HANDHELD-POWERFUL-BRIGHT-UV_W0QQitemZ260230635268QQihZ016QQcategoryZ3223QQssPageNameZWDVWQQrdZ1QQcmdZViewItem (I don't know this seller at all, this is just an example)...

Rog - locust wood glows yellow, and as Switch points out - scorpions!!! I find many of the plants and grass here in TN glows too. Lots of bugs will glow, as well as pee stains.... Yellow goggles will help a lot - reduce the visible violet light so you just see the stuff that is fluorescent (CSI...

I joined this board a couple of months ago to learn about Blu-Ray lasers; y'all have been very helpful.  Now I see several folks interested in what their Blu-Ray can do with these rocks.  Thought I might post a little thread to introduce everyone to what I know of this world... Certain minerals...

Purple Passion - the most common mineral combination is fluorite/willemite/calcite. The fluorite would be FL blue, while the willemite might glow green, and the calcite orange.

And here's a fluorescent pic of the same rock above but lit by the LW LEDs in my laser unit (I have both the LD and 10 UV LEDs in my housing).

Here's another picture I took this morning.  It shows a piece of sodalite in natural light, then lit by the laser.  I "Waved" the laser over the rock to iluuminate the entire specimen somewhat evenly; trying to eliminate the laser hotspots. The fluorescent pic was taken with a 1 second time...

Here's a pic of sodalite lit up by 405nm.....  The background is a sheet of white paper.

A straw yellow filter helps filter out the strong violet/blue and leave the fluorescent colors.   But the darn dot is so bright, it overwhelms everything... You'll find many rocks that glow; common ones include calcite (found most everywhere - just go to a roadcut at night), fluorite, apatites...

Re: The 6 X Blu-Ray Club - 130mW's... Schweet! Yeah - I think that's bad news for plastic lenses.... Perhaps the resons the red shows more on the glass is that the red light is more visible to your eyes. The violet laser is really hard to see, and shows little light unless it hits something...