DX 10557 FINALLY arrived!

[PlayboyJoeShmoe]

It does not seem to give much away to KD 3304 50mW Green 1xCR2
as far as brightness.
KD 3304 has a forward clickie sort of switch and DX 10557 has a regular reverse clickie.

Seems to have Romisen build quality like my other Romisen products.

Mainly I'm just glad that DX sent it after ALL this time!

Just compared it to Romisen RC-F4 and they are the exact same size.
It looks just like a black RC-F4.

Since I never quite figured out how to put a forward clickie in RC-F4
it doesn't look like this green laser will get one either.

So far neither it nor KD 3304 has shown any tendency to act up. They both give nice bright green spots when I activate them.

DX 91 5mW true green laser pen has been bothersome from about the second day.

WOW! SEEMS even brighter with RCR123 (Ultrafire Gray protected 16340).

 

[04orgZx6r]

Well thats great news, mine just shipped a few days ago so maybe I'll get it next week.
Do you have any pics to hold me over while i'm waiting?

 

[joey79]

Mine shipped Friday. Anyone know if it has an IR filter?

 

[04orgZx6r]

Everyone at LPF says no, but the IR leak is minimal 3-5 mw. Good enough for me

 

[lctorana]

I was thinking what a long and skinny cell that was before I realised this was a sku...

 

[IgorT]

Everyone at LPF says no, but the IR leak is minimal 3-5 mw. Good enough for me

These lasers often really don't have IR filters. But the IR leaking is minimal because of the way they are built..

The IR is not collimated in any way before it enters the crystals. Not even the fast axis is collimated, so the beam spreads inside the laser already. Because of this, the expander lens mostly expands the green, and some IR, while blocking most of it. The collimator again mostly collimates the green and some of the remaining IR while it blocks the rest. The apperture at the top blocks what remains of it.

When i was disassembling these types of lasers, i found more and more IR the deeper i went. And when i put it back together i couldn't see any at the top (using a modified CCD).


I think IR was much more of a problem, when crystals had much lower efficiency, and more powerfull pump diodes had to be used, which were also collimated (FAC at least if not completelly into a straight thin beam).

But the cheap crystals in these lasers couldn't even take a collimated IR beam. Unfortunatelly, this same lack of IR collimation which prevents the leaking, often causes problems such as mode hopping..


Otherwise, if you get a good one, they are worth the price, and no more dangerous than expansive lasers with IR filters. As long as you don't shine any of them in your eyes of course...



The only cases in which i've seen more IR was when the crystals were not aligned properly. But it was still only a fraction of what the pump itself produces.