Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 08-07-2010, 10:02 PM #81
Class 1 Laser
 
Join Date: Feb 2007
Location: Santa Monica
Posts: 65
Rep Power: 13
mrbear has a spectacular aura aboutmrbear has a spectacular aura aboutmrbear has a spectacular aura about
mrbear mrbear is offline
Class 1 Laser
 
Join Date: Feb 2007
Location: Santa Monica
Posts: 65
Rep Power: 13
mrbear has a spectacular aura aboutmrbear has a spectacular aura aboutmrbear has a spectacular aura about
Default Re: Testing Wicked Laser Arctic in laser lab 08/02/10; your requests are welcome

Hi Jon,

I believe that Li-Ion batteries (as opposed to NiMH or NiCad) provide a constant current throughout the discharge cycle until right near the end when they crash. So quality batteries should give you the same results if they're at least 15-20% charged, regardless of whether they're fully charged or not.

There are a few members on the boards here who sell hobbyist laser power meters. You might want to check 'em out and see how they compare to the Lasercheck. ;-)


mrbear is offline   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 08-07-2010, 10:23 PM #82
pullbangdead's Avatar
Class 3R Laser
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 238
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
pullbangdead pullbangdead is offline
Class 3R Laser
pullbangdead's Avatar
 
Join Date: Aug 2007
Posts: 2,045
Rep Power: 238
pullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond reputepullbangdead has a reputation beyond repute
Default Re: Testing Wicked Laser Arctic in laser lab 08/02/10; your requests are welcome

Quote:
Originally Posted by JonOrangeLotus View Post
Listen, I'm new to this forum. I don't know ANYONE on this board -- at all. So I want to be very careful about calling anyone out. But when a scientist at Lawrence Berkeley National Labs makes a statement about margin of error, I'm going to at least report what he says. Regardless, I have some new readings, which I'll report now in this thread...
No problemo, dude. I'm not trying to call anyone out, and no need to call me out. I just know from my own experience testing literally hundreds of blue laser on optical power meters and from my own experiences answering questions for novices...that 15% number was pulled out of thin air. Like 78% of all statistics, made up on the spot.

Nothing wrong with reporting it, you're doing your job, and a fine job at that. I appreciate your effort, honestly, and I feel that you're doing a great service. And I'm sure that scientist feels like it was a good guess, but it was just that, a guess. And nothing wrong with that, either, to be honest.

But in defense of my position, your current results seem to indicate he was incorrect. No matter which way you slice it, it would seem your first measurement has an error of at least 25% if your Lasercheck is to be believed. Since your Lasercheck is likely actually calibrated at 445nm, then I'm much more inclined to believe it's closer than a detector calibrated for IR, not to mention all the spec that have to be taken into account when switching from an unknown IR light source to a collimated blue CW light source. Honestly, his calibration could've been fine and instead the detector was locally saturating because of the collimated blue light. Who knows?

Honestly, measuring light in the blue region is a very new science topic compared to doing it in IR. They've been measuring IR lasers for decades now, and blue laser diodes for just a few years. IR lasers are many times more common, and there are hundreds more people experienced with them, and those people just haven't measured blue lasers before. It's a struggle, definitely. I've been trying to find and buy a photodiode with specific specs that is tracibly calibrated for the UV-blue region for measuring laser diode power output for over 6 months now, and it's simply very difficult to find such things, they're just not as common. It's not your fault, it's not his, but "15% error" in that case is hokum.

Last edited by pullbangdead; 08-07-2010 at 11:50 PM.
pullbangdead is offline   Reply With Quote
Old 08-08-2010, 12:48 AM #83
Kenom's Avatar
Class 4 Laser
 
Join Date: May 2007
Posts: 5,629
Rep Power: 304
Kenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond repute
Send a message via MSN to Kenom
Kenom Kenom is offline
Class 4 Laser
Kenom's Avatar
 
Join Date: May 2007
Posts: 5,629
Rep Power: 304
Kenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond reputeKenom has a reputation beyond repute
Send a message via MSN to Kenom
Default Re: Testing Wicked Laser Arctic in laser lab 08/02/10; your requests are welcome

take off the top lens and see if you get the supposed 100mw increase in power.
Kenom is offline   Reply With Quote
Old 08-08-2010, 01:49 PM #84
Member
 
Join Date: Jan 2009
Posts: 47
Rep Power: 0
JonWienke has a spectacular aura aboutJonWienke has a spectacular aura about
JonWienke JonWienke is offline
Member
 
Join Date: Jan 2009
Posts: 47
Rep Power: 0
JonWienke has a spectacular aura aboutJonWienke has a spectacular aura about
Default Re: Testing Wicked Laser Arctic in laser lab 08/02/10; your requests are welcome

So when will your writeup be posted?
JonWienke is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f65/testing-wicked-laser-arctic-laser-lab-08-02-10-your-requests-welcome-53686.html
Posted By For Type Date
comprare wickedlaser? - Virgilio Ricerca Web This thread Refback 02-27-2011 04:10 PM










Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 11:56 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC