Fresh Out of the Envelope Impressions . . . 100mW Green Laser (wavelength 532nm)

You were suffering from mail goodness overload today. It happens, you get all giddy like that.

Hey Foy/Lang i was curious if youve opened it up and if you know if the insides is just like a p60 dropin. as in will it drop into a SF host.

Foy... where did you get your new toy?

Green DPSS lasers are very ineffecient. Mine draws 2.2amps for the 2W IR diode and puts out only >400mW. My 200mw drew about .7amps

Hehe, nearly a bad mistake there Foy :)

I'm still trying to figure out how to make my Duraloops look less disposable.

I swear . . . I guess I've never seen an Ultra Fire 16340 before.

Nutz - GadgetTown, here's the link: http://www.gadgettown.com/50mW-532nm-Flashlight-Style-Green-Laser-Pointer-Pen-with-Clip-and-Free-Battery-HKE03431.html

james - After a quick look it looks like a press fit. I'll take some close ups soon. Wife had me hopping with a semi-large back yard chore this weekend.

33969633 - I could use some of your knowledge. (I'm even less laser savvy than I am with flashlights) What is DPSS and why is it less effecient. I'm planning a review and don't want to butcher the facts.

cantbelieveIalmostthrewitawayFoy

How a green laser pointer works

As you can see, it's not a straightforward process, as is the case with red, blue, violet laser pointers. (common wavelengths are 650nm for red , 445nm for blue , and 405nm for purple)

In a green laser pointer, 808nm laser radiation from a pump diode is used to generate 1064nm light in the gain medium (in this case, the YAG or YVO4). This 1064nm light is then doubled by the KTP to from 532nm light. There's no colour filters involved, it's a laser-pumped laser.

To achieve even a low-power output requires large amounts of 808nm IR pump radiation. For example, the pump diodes found in a 50mW green laser pointer will often average around 300mW IR output.

The human eye isn't very sensitive to 808nm IR- and it's barely visible. It takes several watts of 808nm to achieve visual parity with 1mW of 650nm. As a result, what is mistaken as a dim red light is easily capable of causing instantaneous eye damage.

Although this diagram shows an IR filter (which would cut out all of the infrared from the green beam), most cheap pointers and modules lack this IR filter.

The most common causes of this type of pointer failure are either driver/pump diode failure, or crystal set failure.

Something kinda fun to try is... Take the head off and then remove the focusing barrel (should just unscrew) and your laser will have a green beam similar to a cree zoomie at full zoom. Works well with a gun mount for coyote and other preditor hunting applications. You won't be able to lite matches or pop ballons with it this way but it's easy to change it back to the way it was.

My C1 is just begging for a Foy-bezel makeover.

Dave , you could still burn with it just find the focused spot which should be near where the light comes out, burn damn fast too.

Well, that clears that up. (sigh)

Foy

Lang took down the bezel on his laser (same exact model as mine) and it looks great.

Foy

I think they eat up batteries pretty hard ..my friend killed a real trustfire flame with his ...but it's way illegal strong and pricey at $200

:bigsmile:

Some time ago i was addicted to laser and i start reading everything about it. I also made a laser with an old DVD writer and a homemade circuit board. The problem is that now is forbidden to import laser in italy...

You can burn things and pop ballon also with 5 mw green laser (if it have not IR filter) but it's IR radiation that make the work and it's also quite dangerous because human eyse can't see infrared... With a camera with night-shot mode you can clearly see the IR beam.

If you want a quality laser there is wicked laser that sell good products.

Nice job on the bezel. May have to try that on mine looks like I can take it down 3/8"

After seeing Foy and Langs bad ass lasers and since all the ones I own are mounted on firearms. I decided to get one of my own from Gadgettown. I ordered the 100mw WF502B on the 17th only to receive an email on the 18th saying it was sold out. So I found A 200mW WF502B for $36.89 and ordered it on the 18th, to my surprise I received it on the 20th, yup that's right 2 days later apparently it shipped from NY. Well let me tell you this is a bad mother, it lights matches, pops balloons and shines for miles day and night. I couldn't be happier and with the almost instant gratification of the 2 day delivery and the absolutely breath taking power I can highly recommend this baby.

http://www.gadgettown.com/200mW-532nm-UltraFire-WF502B-Flashlightshaped-Green-Laser-Pointer-HKE03236.html

Makes me jealous. Now I want a more powerful one. My wife finally got a look at my Paypal activities so, I gotta cut back.

Be careful with that bad boy. Our 100mw reflects off everything, I can only imagine what a 200mw does.

IwishIhad1320slaserinsteadofmineFoy

In my limited experience with lasers I have found that the sellers have a tendency to overrate the actuial MW of a laser. I got a 30 MW kaliedoscopic from Dino and some of the 5MW E-Bay lasers are as bright or brighter I even turned up the pot with little success. After that expierience I try to purchase lasers that are guaranteed to be what they say they are. http://www.enwholesale.com/wholesale-true-power-guaranteed-5-in-1-30mw-532nm-green-laser-kaleidoscopic-laser-pointer-pen-bgp-3012-1-battery-included-open-back-fr-china.html

Still can't be 100% certain although the lasers that have some form of guarantee don't seem to get many complaints. I wonder if we will ever see them do this with budget flashlights?

Well, I think I agree with Lang that the geenie we got is probably in the 50mw range, not the 100 in the listed specs. For a no-nothing laser nooby like me - it feels like Star Trek Enterprise. I have had so damn much fun with this thing.

Foy