Search results

Re: GB 405nm Goggle $35 (Laser-Wave) You have mail, Josh.

I haven't tried this, but I think you might be able to use a dremel and a small vacuum to remove the front surface of the can. If you can actually get it out of the module, that would be better, of course, but if you can't, it seems likely that any real pressure applied will just be risky. With...

It would be interesting to know the threshold current for Glaserfan's diode, and the actual power output. Given that information, and a bit of help from Igor, I might have enough information to come up with some reasonable predictions about max power and lifetime expectancy, depending on what...

Not the least bit weird, really. Hell, some of them may even contain fluorescent proteins. But more to the point, it's pretty intense light, in a part of the spectrum where there is very little ambient light. As a consequence, they end up casting more noticeable and distinct shadows on your...

Cordially welcome. It's always good to know more about anything, really. As always, it depends on the application. As a rule of thumb, inside the recommended temperature range, the lifetime of a diode will double for every 10 degree Celsius drop in its operating temperature. I would hesitate...

Re: Violet laser used in a different application.. I don't know about other people, but to me, the brightness and intensity seem seperate in my mind. If I point a 5mW green and a 5mW red at the same spot, the green will seem brighter, but no more intense. Similarly, with LEDs, the brightness...

Regarding the peltiérs, for those who asked, they are current driven devices, not voltage driven. Some peltiérs do not handle higher voltages too well at all. Others are quite happy with it. I assume this depends on the internal wiring and internal resistance (think of it as a huge lot of diodes...

Re: GB 405nm Goggle $35 (Laser-Wave) My payment will be in as soon as I'm done counting the number of buddies that want a pair of their own. So far, I have one definite yes, apart from myself. I expect between one and three additional definite positive responses. If they take too long to think...

Re: Violet laser used in a different application.. The 405nm from a LED makes it hard to see fluorescence, too, at least for many folks. I don't have a problem with it, unless the fluorescence is in the bottom end of the blue-violet part of the spectrum, but I know my S.O. doesn't manage to...

Re: Violet laser used in a different application.. Blu-ray diodes have a wide sideband at lower wavelengths, especially at lower powers or lower temperatures. At least, that's what my datasheets indicate. I haven't gotten around to checking the spectral response yet, due to unforeseen...

Long-term medical leave right now. Prefer to be an independent consultant for the variety. Fields I've worked in range from psychiatry to IT to security to project management to self defense instructor. I learn quickly, but I'm just starting out as far as laser technology goes. The medical bits...

As I recall, most of these are more like hypotheses than actual theories, per se. For all you know, space and time will rip open and some old dude with this huge beard will poke in and shout something increasingly incomprehensible about Babylon and Babel, then stop, have a look at the LHC, and...

Two questions, if you don't mind: (a) Will they block a diffuse reflection, such as those from a matte surface or off angle from the main reflection? (b) Are EN166-standard polycarbonate glasses' OD ratings in the UV range to be trusted for a direct reflection? Not that I'm inclined to risk...

Addendum: sterilization of surfaces is performed with 251nm high-intensity light, which causes T-T crosslinks in the DNA of all living organisms, including humans. Staying in the area for a short amount of time will cause sunburn. A bit longer causes third degree burns. After that, you're going...

Do NOT repeat this experiment. Ever. And certainly not with Igor's blu-rays. Quick breakdown follows: Red lasers: - Aggravates certain skin diseases, including some forms of psoriasis where a mere 5mW will cause the patient to develop oozing blisters that appear permanent. - Collapses blood...

Might want the vice facing a different direction for that. If the can is pointing down, there's at least less dust getting to the chip, although there will still be plenty. If you stick the vice in a box of some sort and flush the box quickly with CO2 (heavier than air, so it'll stay in there...

The rosin flux in my solder paste box is fluorescent, and I think that's the same ingredient that gives it that pine smell, so you could try tracking down some to make a thin coat under the regular paint. Since it is soluble, you can get it quite thin, and when sandwiched between two layers of...

If its an open diode (chip, open, C-mount, etc.), you could use one of those peltiérs that are intended to be affixed directly to the LD chip itself. Nextreme and Supercool both supply peltiérs that are intended to cool the chip directly in this manner. As FrothyChimp said, the temp should be...

Re: What are the tricks to finding the diodes max? COD = Catastrophic Optic Damage. Ild = Current (I) through laser diode (ld). Hamamatsu supplies quality parts ranging from $2/ea and up, including optics and semiconductors that are used both at CERN and in the LHC. The S1337-66BR costs on...

For UV LEDs, I have had great success with yellow polycarbonate lenses intended for certain kinds of welding work. I can't recall the IE166 code off the top of my head, but make sure you check that. They're great substitutes for sunglasses in daylight, too. A lot less fatigue to the eyes...