Old 03-25-2016, 07:45 PM #1
LEDbeam's Avatar
Class 1M Laser
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
LEDbeam LEDbeam is offline
Class 1M Laser
LEDbeam's Avatar
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
Default Laser warmup in reviews

I noticed something that is common in all the videos I've seen where burning things, lighting matches, popping balloons, etc. is done to show the power of the laser. At the beginning, we see the laser being turned on, then a match or whatever is placed in front of the beam. One thing that seems to never be addressed is the laser's warmup period. When these videos are done, is the laser "prewarmed" in order to be at full power when it's first turned on for the video? Otherwise, the first 30 seconds or so of the video is showing what the laser can do during it's warmup period rather than at full power.

I tried to test my idea by watching the very beginning of a video and then skipping to close to the end to see if the beam appears any brighter at the end, but it always looks the same to me.


LEDbeam is offline   Reply With Quote


















Old 03-25-2016, 07:48 PM #2
Razako's Avatar
Class 3B Laser
 
Join Date: Mar 2006
Location: Utah
Posts: 4,476
Rep Power: 282326
Razako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond repute
Razako Razako is offline
Class 3B Laser
Razako's Avatar
 
Join Date: Mar 2006
Location: Utah
Posts: 4,476
Rep Power: 282326
Razako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond reputeRazako has a reputation beyond repute
Default Re: Laser warmup in reviews

Direct diode lasers typically don't need much of a warmup period. Usually it's only 589nm/593.5nm, 532nm and 473nm where you need a warmup period.
Razako is offline   Reply With Quote
Old 03-25-2016, 07:52 PM #3
GSS GSS is offline
Class 3B Laser
 
Join Date: Apr 2015
Location: Fall river MA
Posts: 2,903
Rep Power: 950525
GSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond repute
GSS GSS is offline
Class 3B Laser
 
Join Date: Apr 2015
Location: Fall river MA
Posts: 2,903
Rep Power: 950525
GSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond reputeGSS has a reputation beyond repute
Default Re: Laser warmup in reviews

There really isn't much of a warm up period on at least the lasers they are videoing as they are most likely all of the time over 1W and not a DPSS. The 2 or 3 seconds they need to pic up the match after they click the switch is plenty with all that output and remember they are also following a duty cycle.

By the way did you get your laser yet from SciFi?

Last edited by GSS; 03-25-2016 at 08:02 PM.
GSS is offline   Reply With Quote
Old 03-25-2016, 07:56 PM #4
LEDbeam's Avatar
Class 1M Laser
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
LEDbeam LEDbeam is offline
Class 1M Laser
LEDbeam's Avatar
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
Default Re: Laser warmup in reviews

Quote:
Originally Posted by Razako View Post
Direct diode lasers typically don't need much of a warmup period. Usually it's only 589nm/593.5nm, 532nm and 473nm where you need a warmup period.
Well, I ordered a 1.5--1.8W 445nm laser from SciFi Lasers and I remember seeing an LPM chart somewhere (can't seem to find it now) that showed that it takes about 10 seconds to reach about 1W, and about 30 seconds to reach full power. That's just from what I remember. I might be a bit off on the exact numbers.
LEDbeam is offline   Reply With Quote
Old 03-25-2016, 08:04 PM #5
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,019
Rep Power: 63339
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is online now
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,019
Rep Power: 63339
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Laser warmup in reviews

Quote:
Originally Posted by LEDbeam View Post
Well, I ordered a 1.5--1.8W 445nm laser from SciFi Lasers and I remember seeing an LPM chart somewhere (can't seem to find it now) that showed that it takes about 10 seconds to reach about 1W, and about 30 seconds to reach full power. That's just from what I remember. I might be a bit off on the exact numbers.
Diode lasers are at full power pretty much immediately, and actually lose power after being turned due to heat, and voltage sag.

What you're seeing is not the laser warming up to reach full power, but the slow response of the LPM in question.
InfinitusEquitas is online now   Reply With Quote
Old 03-25-2016, 08:47 PM #6
LEDbeam's Avatar
Class 1M Laser
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
LEDbeam LEDbeam is offline
Class 1M Laser
LEDbeam's Avatar
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
Default Re: Laser warmup in reviews

Quote:
Originally Posted by InfinitusEquitas View Post
Diode lasers are at full power pretty much immediately, and actually lose power after being turned due to heat, and voltage sag.

What you're seeing is not the laser warming up to reach full power, but the slow response of the LPM in question.
Interesting! I did not know this. I thought the laser would start out rather dim and gradually brighten. Since I don't have my laser just 2 days short of a month after ordering (hint, hint) I don't have the hands-on experience yet.
LEDbeam is offline   Reply With Quote
Old 03-25-2016, 10:22 PM #7
InfinitusEquitas's Avatar
Class 4 Laser
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,019
Rep Power: 63339
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
InfinitusEquitas InfinitusEquitas is online now
Class 4 Laser
InfinitusEquitas's Avatar
 
Join Date: Mar 2011
Location: 20 Minutes from NYC.
Posts: 16,019
Rep Power: 63339
InfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond reputeInfinitusEquitas has a reputation beyond repute
Send a message via AIM to InfinitusEquitas Send a message via MSN to InfinitusEquitas Send a message via Yahoo to InfinitusEquitas
Default Re: Laser warmup in reviews

If you find videos by members with ophir based LPMs, you'll see the response time is cut to ~5-10 seconds before the lasers peak, and slowly start to drop. Sometimes after a good long while depending on the batteries and heatsinking.

DPSS lasers on the other hand, can sometimes need a bit of time to warm up, and do fluctuate. My best green laser for example, tends to peak only after about a minute or so of being on.
InfinitusEquitas is online now   Reply With Quote
Old 03-25-2016, 10:49 PM #8
Banned
 
Join Date: Feb 2015
Posts: 1,371
Rep Power: 0
Isaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond repute
Isaac Clarke Isaac Clarke is offline
Banned
 
Join Date: Feb 2015
Posts: 1,371
Rep Power: 0
Isaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond reputeIsaac Clarke has a reputation beyond repute
Default Re: Laser warmup in reviews

yep these guys pretty much covers everything.
Isaac Clarke is offline   Reply With Quote
Old 03-25-2016, 11:14 PM #9
Pman's Avatar
Class 3B Laser
 
Join Date: Nov 2012
Location: Rochester, NY
Posts: 4,391
Rep Power: 148267
Pman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond repute
Pman Pman is online now
Class 3B Laser
Pman's Avatar
 
Join Date: Nov 2012
Location: Rochester, NY
Posts: 4,391
Rep Power: 148267
Pman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond reputePman has a reputation beyond repute
Default Re: Laser warmup in reviews

My Ophir response is a couple seconds at the most and I can catch the output peak just as DTR shows in his vid before there's sometimes a drop from what I believe is voltage sag and heat as Infin mentioned. If I'm testing on my power supply there isn't a voltage sag so it's more of a slower heat drop but depending upon the diode this can take some time to happen. Personally can't stand a slow response LPM but I do have one as a backup.
__________________
I'm not strange, I'm limited edition!

*Jayrob Star Trek Phaser*
# of Lasers - ***
# of DTR/510 laser adapters *
# of eGo/510 mods **
# of Batteries - ***
Wavelengths - 405, 445, 447, 450, 455, 462, 464, 470, 473, 473+, <515, 515, 520, 532, 589, 635, 638, 650, 660, 685, 808, 830, 980
Projector - PD2
O-Like mini red/green to yellow module
Beam Expanders - Dragon Lasers 2x & 5x with universal adapters
LPM's - Modified AW TEC, Custom 6.8W+ Ophir
Datalogger - ARG
Chargers - Ultrafire WF139, (2) Xtar WP2, Nitecore i2, UM20, (3) i4, (2) D4 , Opus BTC-3400 V2.2
Phlatlights - Jayrob PT-54 green 1000lm maglight, PT-54 red project box build, (3) PT-54 red, (2) PT-54 orange (3) PT-121 red, (2) PT-121 blue, (1) PT-121 green project work in progress 5000lm (1) PT-121 green

Links:

**"Pen Laser Thread"**
"Post your pics of unique builds no-one else has"
"Make your way overspec $5 pen focusable"
"Share your inexpensive builds thread"
"Pman special"
Pman is online now   Reply With Quote
Old 03-25-2016, 11:33 PM #10
Alien Laser's Avatar
Class 3R Laser
 
Join Date: Oct 2015
Location: Planet Earth
Posts: 1,045
Rep Power: 333234
Alien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond repute
Alien Laser Alien Laser is offline
Class 3R Laser
Alien Laser's Avatar
 
Join Date: Oct 2015
Location: Planet Earth
Posts: 1,045
Rep Power: 333234
Alien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond reputeAlien Laser has a reputation beyond repute
Default Re: Laser warmup in reviews

My 303 laser was warming up for 2Hours
__________________
People Ask
Why wouldn't you point a laser at the sky?  - > I Say
Because the death star that is floating above earth secretly... may think of it as a challenge and shoot their laser at us in return.... Do you really want that?
_
This is what happen if you shine the laser at the ( UFO ) it may shine back as
( Alien Laser )

Last edited by Alien Laser; 03-25-2016 at 11:33 PM.
Alien Laser is offline   Reply With Quote
Old 03-26-2016, 01:59 AM #11
Benm's Avatar
Class 4 Laser
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,623
Rep Power: 210024
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Benm Benm is offline
Class 4 Laser
Benm's Avatar
 
Join Date: Aug 2007
Location: Netherlands
Posts: 7,623
Rep Power: 210024
Benm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond reputeBenm has a reputation beyond repute
Default Re: Laser warmup in reviews

In some cases a 'warm up period' on direct diode lasers can be intentionally built in to the driver circuitry. This as nothing to do with anything getting physically warm - the driver just ramps up the current a bit more slowly. Some believe this can help to reduce current spikes, and in some driver topologies it can.

Such a 'soft start' feature usually is not -very- slow though, the laser would be likely to produce >90% of power well within a second, though it can be as slow as you design it to be.

Laser power meters that work on a thermal principle will always have some delay in response, and often average the reading over some period of time to get a more stable readout. This can be a couple of seconds, but should not be something in the order of a minute that you sometimes find in DPSS lasers to actually reach optimum temperature.
Benm is offline   Reply With Quote
Old 03-26-2016, 08:08 PM #12
LEDbeam's Avatar
Class 1M Laser
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
LEDbeam LEDbeam is offline
Class 1M Laser
LEDbeam's Avatar
 
Join Date: Feb 2016
Location: Wisconsin
Posts: 192
Rep Power: 67
LEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond reputeLEDbeam has a reputation beyond repute
Default Re: Laser warmup in reviews

Quote:
Originally Posted by GSS View Post
By the way did you get your laser yet from SciFi?
Sorry I didn't see this from you right away. No, I haven't gotten it yet, but I checked my tracking number today (finally got THAT!) and today it shows it has arrived in New York City as of yesterday! If it takes 3 days from there as first class packages usually would, then I should have it in the middle of next week. That is, unless it sits in ISC for awhile first. I looked up what ISC means, as in "ISC NEW YORK NY(USPS)", which is how it reads on the tracking data, and it means International Sorting Center. I've been reading that it could stay there for as little as no time at all, to possibly 2 more weeks, based on what I've been reading of other peoples' experiences with it. https://answers.yahoo.com/question/i...8115929AApm01f
LEDbeam 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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 09:27 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC