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 > Buy, Sell, & Trade



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



Reply
 
LinkBack Thread Tools Display Modes
Old 08-03-2012, 01:11 PM #1
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
KreAture KreAture is offline
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
Lightbulb WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

Looking for blue LDs and lenses for a cnc build.
I really need one, but could get 2-3 LD's just in case I fubar on my controller.
(They will be run by a TTL modulated regulator so I have to get that right or they will pop, thus good to have more than one hehe.)

Shipping would be to Norway and I would like it to be tracked.
Payment via paypal.

If anyone is slaughtering M140's I'd be interested.

Other industrial modules are also of interest, like 5W RED etc, although my understanding is shorter wavelength will absorb better on clear material I may want to cut.


KreAture is offline   Reply With Quote







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







Old 08-03-2012, 07:49 PM #2
sinner's Avatar
Class 3B Laser
 
Join Date: Oct 2011
Location: Dubai, UAE
Posts: 2,567
Rep Power: 1156
sinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond repute
sinner sinner is offline
Class 3B Laser
sinner's Avatar
 
Join Date: Oct 2011
Location: Dubai, UAE
Posts: 2,567
Rep Power: 1156
sinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond reputesinner has a reputation beyond repute
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

https://sites.google.com/site/dtrlpf/home/diodes
this site has the latest 9mm diodes which are much more efficient and people are getting upwards of 3W output from a single diode..
comes with a single mode high quality lens, you'll need a lens barrell for it, Just PM DTR Hes your guy!
__________________
Sinner's Custom Laser Hosts
The Cypreus-EDC Series - All Copper Custom Laser Hosts and Prebuilt Kits.
sinner is offline   Reply With Quote
Old 08-03-2012, 08:27 PM #3
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
KreAture KreAture is offline
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

Quote:
Originally Posted by sinner View Post
https://sites.google.com/site/dtrlpf/home/diodes
this site has the latest 9mm diodes which are much more efficient and people are getting upwards of 3W output from a single diode..
comes with a single mode high quality lens, you'll need a lens barrell for it, Just PM DTR Hes your guy!
Thanks sinner. That certainly looks interesting.

My cnc currently runns with a 12X DVD/RW diode and can cut 3mm depron nicely although not very fast. Getting up to 500mW-1W would make a drastic improvement and at 1.5W I should be able to do thicker depron and maby even some other stuff. Going past 2W would be excellent but I am not sure I get as much for the buck. I see the M140's go for $45-55 and The 9mm's are double that.
I already have a TEC-system on the CNC and run the LD at 15c which appears to give me a few extra % power. If I went to 9mm LD I could do up a new cold-block for it integrating the thread for the lense assy I guess. Would be cool. (Literally)

At a tad lower power than max this LD should be fairly long lived and robust right? Like running it at 1.6A would give a tad of a headroom in case of overswing on the modulation. (CNC turns it on/off very fast as it moves around on small details or dithered artwork.)
KreAture is offline   Reply With Quote
Old 08-03-2012, 11:31 PM #4
DTR's Avatar
DTR DTR is online now
Class 4 Laser
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
DTR DTR is online now
Class 4 Laser
DTR's Avatar
 
Join Date: Jun 2010
Location: St. Louis MO
Posts: 5,482
Rep Power: 10819
DTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond reputeDTR has a reputation beyond repute
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

Here is a great link I give to all my customers that come asking about a M140 for CNC builds.

Laser 530

Here is why 500mW 405 is probably a better option in most cases than a 2W 445 for this type of application.

"I was unable to focus the 445nm to a pinpoint as small as the 405nm. If I had to estimate it would be 0.4 - 0.6mm 'dot' for the 445nm vs a 0.1 - 0.2mm pin for the 405nm. Let's run with that:

405nm dot has a surface area of about 0.13mm^2 (using 0.2mm diameter)
445nm dot has a surface area of about 0.79mm^2 (using 0.5mm diameter)

Assume the 405nm (200mA) puts out at 225mW
Assume the 445nm (700mA) puts out 500mW

405nm delivers 225mW/0.13mm^2 = 1730mW / mm^2
445nm delivers 500mW/0.79mm^2 = 633mW / mm^2"

Last edited by DTR; 08-03-2012 at 11:34 PM.
DTR is online now   Reply With Quote
Old 08-04-2012, 12:04 AM #5
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
KreAture KreAture is offline
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

Quote:
Originally Posted by DTR View Post
Here is a great link I give to all my customers that come asking about a M140 for CNC builds.

Laser 530

Here is why 500mW 405 is probably a better option in most cases than a 2W 445 for this type of application.

"I was unable to focus the 445nm to a pinpoint as small as the 405nm. If I had to estimate it would be 0.4 - 0.6mm 'dot' for the 445nm vs a 0.1 - 0.2mm pin for the 405nm. Let's run with that:

405nm dot has a surface area of about 0.13mm^2 (using 0.2mm diameter)
445nm dot has a surface area of about 0.79mm^2 (using 0.5mm diameter)

Assume the 405nm (200mA) puts out at 225mW
Assume the 445nm (700mA) puts out 500mW

405nm delivers 225mW/0.13mm^2 = 1730mW / mm^2
445nm delivers 500mW/0.79mm^2 = 633mW / mm^2"
I thought you actually wanted some distance between the LD and the target to get a longer "depth of focus". I notice that with my current LD from a DVD-RW drive. If I focus it for a very short distance The distance with good focus will be only 1/2 mm or so making it quite useless for cutting through 3-6mm thick foam sheets. The increased distance between target and laser will increase spot size, but increases depth of focus too.

I am unsure how the LD's compare to my current ones though.
Also, since my current ones are RED I have poor absorption especially on white, light and clear materials. I am currently using standard aixis plastic lense and cutting well at a distance of around 3" with 208 mA current.

I think moving to 445 or 405nm will be an improvement by itself due to the better absorption at this wavelength.

The raw beam size or radiating element size will then be a major factor for focus/spot size as you mention. Since I don't know what I have it is very hard to assess how it will compare.
KreAture is offline   Reply With Quote
Old 08-04-2012, 02:10 PM #6
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
KreAture KreAture is offline
Class 1 Laser
 
Join Date: Aug 2011
Location: Norway
Posts: 80
Rep Power: 7
KreAture is on a distinguished road
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

I did a quick test on my current laser with high speed just to see the trace in some blackened acetate. (Quickly with a black sharpie, thus the uneven covering, but it appears black to the naked eye and the laser.)

See attached image.
The distance noted is from edge of aixiz module with lense protruding ahead of this. That is why I start at 10mm.

I let the CNC run vertically down to create a start-point and then slant up 80mm during a 150mm travel. (8/15 ratio between lengths we see and the travel that generated it.)
Ignore the slanted dots created as this is due to me not mounting and calibrating laser properly, I just slapped it on for the test.
(In a calibrated system the dot would be a single point and not elongated.)
Also ignore the fact that the dots don't line up as the position of the screw in lense will move the point due to it shifting sideways. Normally the focus is not changed so the position does not change during operation.

I changed the focus from closest to far 1 turn pr step.
Closest focus was with lense 1 turn in from initial insert or the spring will kick it back out.

You can see how the DOF increases. The dof is ofcource relative only as I denote it as the range where it strips laquer-color from the acetate.
Since I would be working with 6mm foam in most cases I'd want a DOF where it cuts of more than 6mm. When I work with the very thick stuff I'd need 12mm.

There is no discernable change in the width of the cut so I can only assume I didn't run fast enough and so the corona of the beam also aided in the cut.
None of the cuts went though the acetate at this speed. (1000mm/min)

Since the site only allows 800x600 pics I attached a small one.
Full image can be seen here: http://kreature.org/projects/laser/focus_test_1.jpg
Attached Thumbnails
WTB: 405nm or 445nm high power LDs (1.5w+) and lenses-focus_test_1_s.jpg  
KreAture is offline   Reply With Quote
Old 08-26-2012, 10:32 AM #7
Junior Member
 
Join Date: Aug 2012
Posts: 14
Rep Power: 0
nmz787 is on a distinguished road
nmz787 nmz787 is offline
Junior Member
 
Join Date: Aug 2012
Posts: 14
Rep Power: 0
nmz787 is on a distinguished road
Default Re: WTB: 405nm or 445nm high power LDs (1.5w+) and lenses

So how did things end up?

I need to cut ~2000mm/min in thin silicon ~0.1mm thick, so depth of field shouldn't matter too much. I want a spot size of <5 microns. The 445nm laser should be able to focus quite similarly to the 405nm laser, if you consider the diffraction limit being the wavelength, they're very close (45nm apart).

I am pretty bad with optics, but I feel like this should only take 1 or 2 lenses... but which ones :/
nmz787 is offline   Reply With Quote
Reply

Tags
cnc ld 445nm buy





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











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 05:45 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