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Jetlasers Pl-E Mini 405nm 300mW Review - Lots of Pictures

Av8tor

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Hello, as some of you know I am new to LPF and am loving the community here. I signed up when I ordered my first two lasers (not pointers) from Jetlasers, however I am going to write two separate reviews so they may be easier to find for people interested in the different models. Let's start with the Pl-E Mini 405nm 300mW. This is my first review, and first major post on the forum so please be patient with me, and know that I still have much to learn about this hobby.

DISCLAIMER: As I am new, I do not yet have the necessary equipment (LPM/ Electrical Testing Equipment) to do precise measurements of output power, electrical performance and current draw, nor beam/dot measurement. I apologize in advance for not being able to provide this information if that is what you are looking for. I WILL however promise to give you my unbiased opinion about this laser and provide plenty of pictures for your drool-worthy pleasure;)


Let's get right to it. As this was my first high-powered laser purchase, I wanted something of quality and reliability, and I wanted a focusable laser that I would be able to see the beam as well. After looking through the forum it quickly became apparent that Jetlasers was the way to go. I know 405nm is not known for it's beam visibility in comparison to other wavelengths, I loved the 445nm beam and performance, however I was leery to get such a powerful laser for my first and wanted something more modest (even though 300mW is still very dangerous and needs to be handled with respect) that I could establish familiarity with before growing into the Class IV.

Ordering from Jetlasers/Gray was a real pleasure. He was very patient with me in answering all my noob questions and helping me make a well-informed purchase decision. He was very prompt in his replies, and never acted annoyed or put off by my many questions. If we had more companies that provided customer service as Jetlasers does here in the US, businesses would find themselves to be much more successful as I believe happy and loyal customers are the best marketing a business can have! Gray even offered to upgrade me to the 1.6Watt 445nm Pl-E Mini for free as he knew I wanted a visible beam, but I didn't feel comfortable getting something that powerful...yet. Ordering was easy and simple, and took 10 minutes to make an account, checkout and finalize payment. I really like how they only use PayPal as that not only makes things simple, but does provide a level of security as well. I always get nervous when purchasing high-value items internationally.

I decided to order the 300mW 405nm as the price was affordable, $153.00 ( $149.00 for the 150mW version) NOT including batteries, or the $38.00 shipping charge which in itself was worth every penny (more on that later). I ordered mine with the Coded switch which allows you to have the laser powered in Constant-On at 100% or 50% power output, and also a smaller button which enables a pulse mode. I would have preferred to have a momentary on/off button (as the Mechanical Switch option does) but I liked the ability to decrease the power output especially for use indoors.

SHIPPING
As I stated earlier the shipping charge is $38 via DHL/FEDEX. As you can see, the package was in transit for a total of 55hrs!! Now I've ordered items from China in the past and paid over double that amount and had to wait for 12-15 days to receive the package. Now that wasn't with either of these carriers, but I was blown away with how fast the shipping was!

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The package came in a FedEx envelope which due to excitement I did not take any pictures of, son of a diddley! However, here are some of the box and the items once unwrapped of the liberally applied bubble wrap to the Laser, Tail-cap, And Battery Charger each independently which was excellent to see. Part of me thinks an egg could've survived in this packaging, and that makes me very confident ordering from them again as they really go the extra mile to ensure a safe delivery of their products which also shows the pride they take in their products!

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The Tail-cap and Battery Charger were also wrapped in anti-static bags underneath their cozy bubble wrapping.

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Behold...The Probe of Violet Glory
First, I really only have three words to describe the craftsmanship and attention to detail....wow, WoW, WOW! The Laser feels solid, no rattle from anywhere even the Focus Ring has no movement and stays where it's set. The host is hefty, but not in an uncomfortable or bulky way...in fact I like the weight. It is hefty in a way that you just feel the quality and time that was put into it. I don't know how big of a company Jetlasers is, but aside from the machining if feels like the entire unit was hand assembled and they took their time doing so. The anodizing is flawless and seems to be robust and not easily scratched. The threads slide right in like on prom night. The battery tube and Laser head is one unit unlike it's well endowed brother. But that is okay because it will hold both x1 18650 or x2 18350/16340 batteries, however with this diode you need to use the latter two. I got some 18350's as I wanted to get the best run-time I could. (*Note - Online is the only place to get these at least in my area. I was told by many vape shops/hobby shops around that 18350's stopped production in 2015. I went with AWT 18350 850mAh. The buttons are very responsive and well secured, however not as clicky as a mechanical switch. I like the feel of the coded switch! With Batteries the unit is well balanced but is heavier in the front end. Lastly the focus ring is perfect! It's operation is very smooth and stiff so it keeps it's setting. I believe they hand match these two pieces together for best fit during assembly. No edges are too sharp or rough and theres no burrs...this was well prepped before being anodized. What I really like about this laser is that it seems a lot of lasers out there are conversions from flashlights (which makes sense in their similarities) however, the Pl-E was clearly designed from the ground up to do what it does best. It's clear it was designed to provide the laser module with what is necessary for reliable operation in many environments and to stand the test of time and maximize the life of the diode. The lens at the front of the aperture appears to have an AR coating of some type. The only thing I did not like about the host is that there is no reference marking on the body to indicate where infinity is and align the Focus Ring with body like the Pl-E Pro does. This would be a helpful thing to have, however to me it's more a luxury as operationally the laser functions flawlessly I've really been impressed!

Here are the Specs copied from Jetlasers website.

Dimensions - 34mm Head Diameter x 27mm Tail cap Diameter x 23.3 mm Length
Net weight without batteries - 380g or 0.837lbs
Power Supply - x2 16340's/RCR123A's/18350's
Working Voltage - 7volts
Diode Life Time - 6,000 Hours
Beam Divergence - ~2mRad
Beam Diameter at Aperture - 2.5mm at aperture (*Adjsutable)
Transverse Mode - Code Switch = CW and Pulse Mode
Working Temperature - 15 to 35 degrees C (59-95 deg. F)
Warranty - One Year


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Note the clean machining and detail on the crown!

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For reference to size...here it is next to an eBay 532nm Laser Pen

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From the bottom you have the Battery Orientation indicator, Constant ON/OFF then the smaller Pulse Mode button, followed by the 2 LED's, and further up the body the Focus Ring.

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The bottom of the laser, you see the Pl-E Mini etching and the port to use a Remote Switch. Look at how clean and masterfully machined the heatsinking is!

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The threads are very well tapped and buttery smooth! Also, as you can see the handle has a very nice knurling.

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Here you can see the position marker on the Focus Ring. As stated earlier, there isn't a matching one along the bottom indicators which indicate infinity when aligned. The Pl-E Pro will have this.

Batteries, Powering Up, and uh, LASING!
Okay, so once you feel you've adequately fondled your new Laser Rod of Pleasure, you'll feel that the right time has come to turn each other on. As I stated earlier, this particulate wavelength requires x2 18350's or 16340's (As does their 445, 465, and 520nm models. The DPSS Pl-E Mini 473nm and 532nm will use a single 18650). The batteries go in with negative facing the Laser Head. I've seen you can use magnets and Jetlasers has even sent them out before in other people's orders on the forum, however I did not receive any so I've been using a small brass disk in-between the batteries as they're both buttonless. The magnets would be much nicer but I've found the disk is small enough to be caught between the top of one battery and the wrapper of the other.

11841-pl-e-mini-405nm-broken-down-showing-battery-orientation-tailcap.jpg
Just incase, Jetlasers was kind enough to etch the Battery Orientation on the Host.

Once you've inserted the batteries and screwed the Tail cap on, all that is needed to do to power up the unit is to activate the click-button on the bottom of the Tail cap. You'll see the two LED's turn red indicating it is active. (*Note - I just feel responsible to say this even though I shouldn't have to but someone always thinks their invincible. One powered on, BE SURE the laser is pointed in a safe direction free of mirrors or other reflective surfaces as it only takes a slight press of the button to activate the laser and it's easy to activate if not paying attention.)

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You can see the 2 LED's indicating the laser is powered on

Okay, so for activating the laser remember this unit has the Coded Switch. REMINDER- I do not yet have an LPM so the output power referenced is based off the power selected while ordering from Jetlasers.* So 1 press of the Constant ON/OFF button (The bigger matte one) will activate the laser at 50% power setting which for this laser is 150mW and the 2 LED's will turn green. Pressing the button a second time will rustle your shorts and you'll see the laser in all it's glory, 100% at 300mW. It is a very visible difference between the two. At anytime, you can press the smaller chrome button which will activate Pulse Mode which will turn the 2 LED's blue/red. Pressing the chrome button again will take you back to constant on. I don't know of any useful applications for using the pulse mode, if anyone here knows of some I would love to hear from them but it's neat nonetheless. To deactivate the laser, you have to hold the Constant ON/OFF button down for 2 seconds. The LED's will return to red. You may also use the mechanical button on the Tail cap, however I like to have the laser deactivated before powering down...I guess that's the pilot in me and years of checklists.

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Here the laser is activated at 50% power setting (1 Button Press) at 150mW.

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And here, the laser is activated at a keister-spanking 100% (2 Button Presses) at 300mW!

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And now, the toe-curling ending you've all been waiting for!

You've made it this far! As I don't have the equipment to measure laser power, beam divergence, etc. it has been my aim to give you a detailed look at the function, design, and quality of this laser so anyone looking to purchase one can get a good feel for the looks and craftsmanship without having to see one in person. I must say, I have an appreciation for well built, well-designed technology and am known for not spending my money unless it's on a quality piece of kit. With that said, the Pl-E Mini 405nm completely meets and exceeds my expectations. I am not familiar with the average cost of diodes/modules and drivers, or lenses...but simply from a build quality/performance perspective, I believe Jetlasers could be charging much more for these units and that the Pl-E Mini demands every penny it costs in what I think is a very fair price Jetlasers charges. *Note - I was in no way compensated by or encouraged by Jetlasers for my time doing this review. I paid retail price for this unit, and simply want to make a contribution I can to this community in helping others who may be considering buying this or another Jetlasers product but also to share the outstanding product Jetlasers puts out and the wonderful experience I've had in purchasing from them. Thank you Gray and Jetlasers!

Okay, without further ado...BEAMS! I did use steam for some of these pictures, however I can clearly see the beam in a dark room with no performance enhancers.

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Pl-E Mini 405m at 100% 300mW.

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Here are some beam shots with a Pl-E Pro 532nm 300mW for comparison. The Mini is operating at 100% 300mW for all these photos. Steam was used.

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Well that's it for my review of the Jetlasers Pl-E Mini 405nm 300mW. I appreciate you bearing with me to read through all of that. I apologize I can not provide LPM measurements or beam/dot measurements, and other technical data. After I complete my first laser build I plan to start getting proper measuring equipment. If there is anything I missed, or things you'd like to see please let me know. I would be happy to answer anyones questions to the best I can and if someone wants more pictures, I can make that happen as well. Next I will be working on my review of the Pl-E Pro 532nm 300mW laser, and stay tuned for a Pl-E Mini 473m 50mW review!! Thank you again, and i hope you enjoy.

EDIT: I forgot to mention two things. First, the Focus Ring works very well and has a very small window of focus at distances up to 50ft. I have not yet had the opportunity to play with focusing the laser at greater distances but will post updates when I can. I enjoy the way the focus works on the Pl-E Mini more than I do on the Pl-E Pro. The Pro just seems to be more 'mushy' in it's focusing and has a much larger window of focus and I've found it isn't as easy to get focused as the Pl-E Mini as it takes a lot of back-and-forth. Maybe that's just because it's still new to me and at the different wavelength and being DPSS it makes it harder to see as well with the goggles I have. My goggles are rated for 190-540nm AND 800-2000nm so I use them for both lasers. Second, you can't see it in the pictures but there is an artifact that is visible ~ .5-.8 inches away from the dot at around 20+ft. I have tried cleaning the lens with the microfiber cloth that was included, but it is still there. It's not a big deal to me as the laser can still burn just fine and when using goggles t view the dot, it looks perfect and precise. Just wanted to mention that as some people will be more concerned with it than I am.

Also, battery life has been terrific. I have not measured a total runtime as it's been using the same charge since I've got it, and I'm very conservative on the duty cycle I use with it. If I had to guess, I would say you may get 3-4+hrs of total runtime out of 2 850mAh 18350's but that's purely a guess based on my short time with the laser.
 
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Razako

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Nice review, always good to see more happy JL customers. I've never been disappointed with a single JL product myself, and I have like 7 lasers from them. No quirks, flaws or other problems. Just properly working overspec lasers.
 
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Radim

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Oh, man... You are here so short time, that basically you cannot know where the restroom is here yet and writing review? Such an awesome review! It's rare for junior members to post something like this. Great job!
:gj: :thanks:

I wanted to rep you, but I already did yesterday, I need to spread some before.

Regarding the focus - I did it like this with my JL: I put it on still fixed position, switched it on and observed dot closely with goggles (remove glare) on at some distance. I changed focus settings in some interval and in addition I observed the beam. The aim was to get it the most collimated. By decreasimg the interval to smaller and smaller by many comparsions I was able to find the best settings. You might use piece of paper with many squares or printed rule on it to get reference of dot size (glasses on during measurement). These short wavelengths are hard to adjust, since they are tricky to eye. Your 405 nm will be harder than my 473 nm in terms of wavelength is "more tricky", but mine is DPSS with more tight beam and therefore harder in this sense.

And what about the color? How you perceive it? Did you try some experiments like fluorescence? Just tips with what to replace LPM test with some other value - I also do not have any. :D

I'm looking forward to see your further reviews.
 
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Glad to see more reviews popping up, and yours was excellent! JetLasers really isn't a company you get go wrong on, they ship fast, have amazing customer service and stand by their word.

Enjoy your beautiful laser. By the way, those last shots with the 532 laser go really well with the 405 :D

-Alex
 
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That was pretty good review considering you don't have any test equipment. IDK, I think $191.00 is a lot to pay for a 300 mW 405nm handheld laser. But, if you're happy, that's all that matters. Good luck, and enjoy!
 
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Av8tor

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Nice review, always good to see more happy JL customers. I've never been disappointed with a single JL product myself, and I have like 7 lasers from them. No quirks, flaws or other problems. Just properly working overspec lasers.
Wow, 7 Jetlasers?! That's awesome, what wavelengths have you got? I can see why, I'm very impressed with their products. Since getting into the hobby 2 weeks ago, I've acquired this Pl-E Mini and the Pl-E Pro 532nm and just today, ordered the Pl-E Mini 473nm which I'm very excited for! I'd really love to have one of those TI-B's and have began to watch the buy/sell for one, but I have to slow down and pay some attention to those pesky adult responsibilities too:toilet:

Oh, man... You are here so short time, that basically you cannot know where the restroom is here yet and writing review? Such an awesome review! It's rare for junior members to post something like this. Great job!
:gj: :thanks:

I wanted to rep you, but I already did yesterday, I need to spread some before.

Regarding the focus - I did it like this with my JL: I put it on still fixed position, switched it on and observed dot closely with goggles (remove glare) on at some distance. I changed focus settings in some interval and in addition I observed the beam. The aim was to get it the most collimated. By decreasimg the interval to smaller and smaller by many comparsions I was able to find the best settings. You might use piece of paper with many squares or printed rule on it to get reference of dot size (glasses on during measurement). These short wavelengths are hard to adjust, since they are tricky to eye. Your 405 nm will be harder than my 473 nm in terms of wavelength is "more tricky", but mine is DPSS with more tight beam and therefore harder in this sense.

And what about the color? How you perceive it? Did you try some experiments like fluorescence? Just tips with what to replace LPM test with some other value - I also do not have any. :D

I'm looking forward to see your further reviews.

Radim, as always, thank you very much for your kind words! While I am learning and building my knowledge-base in this hobby, writing a review is a way I can make my contribution to this community and I'm happy to know that more veteran members see value in that! Much appreciated.

Lol, thank you kindly I just saw that! That's quite okay please share around, while I do appreciate reps that's not what I'm here for and there are many members sharing valuable knowledge especially when it comes to the very technical side of this hobby and building, or sharing their amazing works of art!

Thank you, that is a fantastic idea I am going to try tonight! What kind of distances were you working with while doing that? How did you mark it once you found it? I really like the idea to use graph paper, that could be very useful for this application and even makes me think it would make a good background for taking pictures of the dot to have as a reference. I can totally see what you mean, though the wavelength is tricky to work with due to the visibility aspect... the DPSS lasers do seem to be harder to work with in regards to focusing. The 532nm laser I just received is very tricky for me to get focused which I thought was odd as its among the most visible spectrum to the human eye, but the fact that it's operation is different and has a tighter beam profile which contributes to that difficulty makes sense. How are you liking your 473nm now that you've had it for a bit? I'm super stoked to get mine, but I am nervous going with the Pl-E Mini and getting the 50mW may not be as visible as I'd like. However I really like the size and feel of the Mini compared to the Pro.

The color is truly captivating! No pictures can do justice to the beautiful light this wavelength produces! While I love lasers in all the wavelengths available, there is now a special place in my heart for 405nm! I did get some GITD stars and vinyl strips that have been fun to play with and interesting to see, but I definitely want to get much deeper into playing with various fluorescents, and even optics as you suggested.

Glad to see more reviews popping up, and yours was excellent! JetLasers really isn't a company you get go wrong on, they ship fast, have amazing customer service and stand by their word.

Enjoy your beautiful laser. By the way, those last shots with the 532 laser go really well with the 405 :D

-Alex

Alex, thank you very much! That motivates me to get this other review finished up quickly. I must say, taking the pictures for the review sure is a diode-charged jolly time! Absolutely, I can count on one hand the different companies I've done business with that are on the level Jetlasers is in terms of their products and service they provide to their customers.

Thank you, I am very much so. I agree, my favorite is the one of just the Pl-E Mini with the backwash of the 532nm! I was surprised at how visible the 405nm was next to the 532nm especially being the same power output.

That was pretty good review considering you don't have any test equipment. IDK, I think $191.00 is a lot to pay for a 300 mW 405nm handheld laser. But, if you're happy, that's all that matters. Good luck, and enjoy!
Hey Paul, how are you doing? Thank you kindly!! Really? You're quite experienced in this hobby, from what you know...what would you estimate the cost is for parts not including the host (Diode, lens, driver, etc.) for a similar 405nm laser? That surprises me, as the craftsmanship, design, everything is just fantastic and compared to other manufacturers that charge in excess of $500.00 or more (of course not all are 405nm) for their handhelds who's hosts don't appear nearly as sultry or well designed/thought out. Even the Pl-E Pro 532nm I just got from Jetlasers for $179.99 + Shipping really struck me as seeing Optotronics charges $824.00 for one with the same power output (300mW)! I am very happy with it, and now that I have a few handhelds...I can't decide whether to take on my first build or pickup a labby. I'm open to suggestions, haha.

Nice review! Especially for your first one. Love all the pics and beam shots. :gj: thanks for posting. Looking forward to your second one. :)
Thank you Bob! I'm hoping to post the other one sometime tomorrow! That one I was able to better manage my excitement and take more detailed pictures of the laser and unboxing haha :)
 
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BobMc

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Nice review! Especially for your first one. Love all the pics and beam shots. :gj: thanks for posting. Looking forward to your second one. :)
 

Radim

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BTW I'm not vet here yet. ;) But you are right.

I also do learn here a lot. I think once you stop learning you start missing new stuff and who here can say knows everything? That's the power of community who knows a lot (very likely much more than any individual), still not everything. That keeps LPF alive IMO.

For beam focus adjustment I used like 3-4 meters and that was sufficient. I got the same result as for like 20 meters test. I just took a photo of the position and remember the focus in relation to knurling on module part. You might use some sticker or white marker, but I wanted it free of any marks. Anyway it depends if you do full turn of focus ring, but it's large difference, so you will notice it as you need to do the full turn.

There were even some troubles with JL that the focus ring was not firm and the position of infinity moved, but it looks it was just one piece problem. Mine holds it well - still same place.

With wavelength it is not only visibility issue, but the fact that shorter wavelengths are scattered more in the atmosphere. With 532 nm I guess it is combination of tight beam and maybe that it is very bright as perceived by eye. I think you know how to solve that already. ;)

My 473 nm is still great. I think my review describes my impressions accurately and honestly, nothing changed since than as I used laser for like over a month (?) before I started to write the review (done during weekend). Still regarding your needs, which I see as to need variability of use and potentially going for 100 mW, consider getting PL-E Pro. As I mentioned in my review, 473 nm heats a lot, since the DPSS process is very ineffective with this laser. Much better cooling will be with larger host. Also this laser is very sensitive on temperature in terms of power and mode hopping. Basically I'm speaking about duty cycle and I also discussed it in my review. It was a big question for my laserpainting needs and according my experience the laser has to be observed carefully as it might switch from TEM00 to TEM01 during exposure. I overcame this with using remote switch and letting it cool down during exposure. Still I'm about to try my additional cooling idea very soon.

Also mechanical switch is recommended as variable power produces instabilities according to discussion I had with Gray. For this reason consider key-lock tailcap or both of them, depending on the safety you are able to provide for storing your lasers.

Regarding instabilities and mode hopping you might check the experiment I did with my EVO recently here. At the end I also mentioned my cooling idea.

For fluorescence try clothes washed in detergent, just diffused light is sufficient to start glowing it. Try various liquids like water (if pure no fluorescence likely) with added stuff (like detergent or something), beer (see my avatar - 405 nm in glass of beer), uranium glass if you have some. Even wood makes fluorescence often, but some trick is needed to see it. I quoted below one of my related discoveries when analyzing test shots for earlier artworks.

...

And exclusively extra pic only for LPF - when experimenting with the sphere I noticed this effect:

11753-just-interesting-example-fluorescence-405-nm.jpg


It is a deep zoom in one of my test shots (so sorry for a poor quality). Look at the 405 nm laser paths. On the left you can notice a little rainbow! My 405 nm dildo is a true rainbow laser! Oh, not really - it is as monochromatic as lasers are. It's just a huge fluorescence of high energy 405 nm photons on wood. The sphere separated it from much brighter 405 nm laser light due to different refraction indices of glass for different wavelengths and brought it into rainbow. Note that energy of fluorescent light (which is not coherent laser light) is much lower and lays deeper bellow 405 nm and also there is a slight gap in the spectre missing part of blue - energy issue. I really love this effect. If I'm mistaken in some part of my explanation, let me know - I'm here on LPF to learn more as well. :)

So many things might be forced to glow.

Try glowing phosphorus stuff (the one which keeps glowing once you "charge" it with light), if you have kind of large flat surface you might paint on it with laser and the image slowly vanishes - great experiment and I think your sisters will love it. Try fluorescent colors - I saw even these where they glowed for a fraction of second after dot moved across them. A lot of minerals looking quite boring under normal light produce awesome colors under UV or close to UV.

With your green laser you might try olive oil - it also should produce red fluorescence, I even have some kind of glass, where it produces red beam.

11803-fluorescence.jpg

(Sorry for quality - early experiment with mobile cam)

And I think I missed and forgot a lot of things to mention...

Edit: I just discovered this thread: http://laserpointerforums.com/f54/exciting-news-about-blu-ray-lasers-fossils-100697.html
 
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BowtieGuy

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A very good review, especially for a first time effort, good job Av8tor! :beer:
You can't go wrong with J/L's quality and service, I've been collecting them since 2012 and haven't had a bad experience yet with over 12 of their lasers and counting.
Definitely looking forward to your next review.

Gotta love some of your phrases like these two: "Slide right in like on prom night" & "rustle your shorts". :crackup:

You're right about the Jetlasers/DHL shipping times; they can't be beat.

PS - Be very careful using that brass disc between your batteries, don't let it touch the battery tube.
:gj: +rep!
 
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Razako

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Wow, 7 Jetlasers?! That's awesome, what wavelengths have you got? I can see why, I'm very impressed with their products. Since getting into the hobby 2 weeks ago, I've acquired this Pl-E Mini and the Pl-E Pro 532nm and just today, ordered the Pl-E Mini 473nm which I'm very excited for! I'd really love to have one of those TI-B's and have began to watch the buy/sell for one, but I have to slow down and
I have the following
PL-E pro 1W 650nm
PL-E pro 800mw 532nm (actual output is around 950mw-1W)
PL-E pro 100mw 473nm (output is around 185-200mw once warm)
An equality series 1.4W 462nm
PL-E pro 1.4W 462nm
And somehow(don't ask me how, it was kinda silly) I ended up with 2 3.5W 465nm PL-E pros.

If you're interested in expanding your own collection I could probably sell you the equality 462nm at a decent deal. Don't really need it as I have a PL-E pro in that wavelength.
 
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Hi, Av8tor, since you asaked, you could have gotten the 12X 405nm laser diode in a copper module with a set driver and three element lens from DTR's website for $71.00 shipped. All you need is a host to put it into and connect two wires and you are done. Then you would have had a 405nm laser that is over 500 mW and is focusable to a small spot. If you added a single element lens to it instead of the three element lens it would output 700 mW and if you out sourced the parts and did them all yourself you could have had the laser for about $70.00 in total, minus the cost of batteries which is not expensive at all. Push that up to a 16X diode and you could have had a 900 mW laser for about $90.00 with a nice focus range. If you need assistance doing these things just ask. I'll be happy to help you any way I can. :D
 




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