Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

50mW green laser is very dim or not on at all

partylighter

partylighter

0
Joined
Apr 4, 2009
Messages
22
Points
0
Guys,

Since summer 2008 I have two DX green 50mW lasers one pot modded and one 'true' 50mW. Until last summer they worked without problems although sometimes they got sometimes dimmer but after using longer they worked again normally.

Now after 3 months of non usage they did not function anymore I replaced the batteries and saw a dim green light and then wednt off. I tried both alkalines and charged NiMHs (2xAAA) same problem.
The ambient temperature was 17-18oC, colder than previous times.
A third one purchased in Jan 2010 does not have these issues and works normally.

Do these devices age even when not in use ?
 





Eudaimonium

Eudaimonium

0
Joined
Feb 5, 2008
Messages
6,252
Points
83
You should allow "warm up time" of about two minutes of ON time, green lasers are very susceptible to ambient temperature changes due to very delicate optical crystals.

Also, try fresh Alkalines, not NiMHs.
 
Last edited:
Zeroignite

Zeroignite

0
Joined
Oct 7, 2010
Messages
47
Points
0
The warm up time is needed. When it's cold my greenie takes either a substantial warm-up time or heating in my hands to reach full power.

Have the lasers been bumped/dropped/shocked at all? It's possible the lasing crystals may have been misaligned if they were.

Also, Eudaimonium, he did state he tried alkalines.
 
Hemlock_Mike

Hemlock_Mike

0
Joined
Jan 7, 2007
Messages
6,309
Points
83
My S-KY 150 needs to be preheated to 36 Deg C before it puts out rated power. It will also work good for a short time at 17 Deg C. Go figure.

HMike
 
Eudaimonium

Eudaimonium

0
Joined
Feb 5, 2008
Messages
6,252
Points
83
Zeroignite said:
The warm up time is needed. When it's cold my greenie takes either a substantial warm-up time or heating in my hands to reach full power.

Have the lasers been bumped/dropped/shocked at all? It's possible the lasing crystals may have been misaligned if they were.

Also, Eudaimonium, he did state he tried alkalines.
Click to expand...
Oh yeah :eek:
My bad.

In any case, there are a lot of possibilities just to give the answer right now.

We need more input from the OP.
 
partylighter

partylighter

0
Joined
Apr 4, 2009
Messages
22
Points
0
OK the green lasers are not used for months, now batteries replaced, and no bumps or other shocks happened. they stayed just in the drawers.
 
Eudaimonium

Eudaimonium

0
Joined
Feb 5, 2008
Messages
6,252
Points
83
Hmm, only possible reason I can think of is, that they are from Deal Extreme after all and it's indeed possible they are so low quality that they die off in a month or two.

If you are looking for some great lasers , go to O-like.com:
Welcome to O-Like.com, Your source for laser products

Warmly reccomended by couple of members here, there was also a review but I can't find it :
Silver chrome green laser 50mW/good finish [OLSGL50] - $29.00 : Welcome to O-Like.com, Your source for laser products

They only cost a little more than DX junk, put pay off incredibly.
 
partylighter

partylighter

0
Joined
Apr 4, 2009
Messages
22
Points
0
I out it on the central heating radiator (30oC) and then it worked.
Is this really a temperature issue ?

BTW the O-like are they really better ?
Prices are not that bad does not differ much from DX.
 
Eudaimonium

Eudaimonium

0
Joined
Feb 5, 2008
Messages
6,252
Points
83
partylighter said:
I out it on the central heating radiator (30oC) and then it worked.
Is this really a temperature issue ?

BTW the O-like are they really better ?
Prices are not that bad does not differ much from DX.
Click to expand...
O-like stands high reputation here.
For the price, quality is unbeatable.

However, for top-notch products you should try LaserGlow, Dragonlasers, or any other CNI reseller.

But since those prices are quite high, O-like is the way to go.
 
aryntha

aryntha

0
Joined
Nov 17, 2009
Messages
2,031
Points
83
partylighter,

My DX greens generally do not emit *AT ALL* unless I hold them in my hand or place them on the windowsill in the sun for a while. During the winter, in my (rather uninsulated and cold) closet, they'll almost never emit any 532 right off the bat.

So yes, temperature does matter with these. The "good thing" about the DX greens I have is that after they -do- warm up, they're very overspec. They were all bought as 5mW units; two do around 50mW... One's an absolute freak and does *90mW*. After warmup of course.
 
You must log in or register to reply here.




Top