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 10-02-2010, 02:18 PM #1
Class 1 Laser
 
Join Date: Dec 2007
Posts: 54
Rep Power: 16
quantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to all
quantile quantile is offline
Class 1 Laser
 
Join Date: Dec 2007
Posts: 54
Rep Power: 16
quantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to all
Default A140 diode low power build

I wanted a 445nm laser at low power that could actually be used for pointing.
My favorite host for a low power side-button build is the Atlasnova red laser pointer. It is pretty easy to open and most of its components can be re-used for the 445 build. The host looks like this, classic slim <5mW "two AAA" pointer, its diameter is a little bit less than that of an Aixiz module.



The head is press fit into the barrel, easy to remove with pliers cushioned with some rubber or leather in order to protect the black finish.
Here you can see the original pointer's driver board. Note that there is a 5.6mm "can-type" red laser diode in there, not one of the "chip-on-pcb variety" found in most cheap red pointers. That's what I like most about the Atlasnova host: The brass diode holder can be re-used to mount the new diode into.



After pushing out the 650nm diode I put in the 445nm Casio LD, used a tiny amount of thermal compound to make as much as possible of the little bit of heat sinking the brass module provides.
Kept the original lens (plastic, uncoated as far as I can tell), should be able to hold up to the 445 diode at low power. The lens sits just behind the pointer's tip, focus is achieved by screwing the brass module into that tip.

I wanted the pointer to run on alkaline or NiMH batteries, so I used a step-up driver.
The driver board just fits inside the barrel and has enough space on its back side to mount the switch and spring. I simply glued the switch onto the PCB and used one of its legs to solder the positive contact spring.
The driver is set for ~280mA, puts out about 40mW. I expect the output to fluctuate quite a bit with temperature since the diode is driven just above lasing threshold.



The dot is not very pretty of course and that little brass holder gets warm when the pointer is used continuously but I think it could actually be used for pointing at reasonable distances.

Maybe one day one can get 50mW 445nm single-mode diodes at reasonable prices but until then this thing has to hold me over


quantile is offline   Reply With Quote







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







Old 10-02-2010, 02:24 PM #2
Class 1M Laser
 
Join Date: Aug 2010
Location: Arlington,Texas.
Posts: 172
Rep Power: 8
Kulhu is on a distinguished road
Kulhu Kulhu is offline
Class 1M Laser
 
Join Date: Aug 2010
Location: Arlington,Texas.
Posts: 172
Rep Power: 8
Kulhu is on a distinguished road
Default Re: A140 diode low power build

beamshots please!
__________________
1x 5mW overspec 405 ebay pointers
200mW 532nm Rayfoss FLX
4x 5mW overspec 532 ebay pointers
200mW red WickedLasers E1 Executive Pulsar (Not shipped(ordered July 22))
300mW home build 808nm Laser(Working but not completed)
Kulhu is offline   Reply With Quote
Old 10-02-2010, 02:26 PM #3
daguin's Avatar
Super Moderator
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
daguin daguin is offline
Super Moderator
daguin's Avatar
 
Join Date: Mar 2008
Location: Sunny Southern California
Posts: 16,636
Rep Power: 1432
daguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond reputedaguin has a reputation beyond repute
Default Re: A140 diode low power build

SWEET! My 50mW 445nm gets used more than any of my other 445nm lasers.

Peace,
dave
__________________
How To Get Along In and Be Accepted in the Forum

If you got some value out of reading this forum, how about donating $2 to keep it going?
Click Here to donate

Love all, trust a few, do wrong to none.
-William Shakespeare
daguin is offline   Reply With Quote
Old 10-04-2010, 08:37 PM #4
Class 1 Laser
 
Join Date: Dec 2007
Posts: 54
Rep Power: 16
quantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to all
quantile quantile is offline
Class 1 Laser
 
Join Date: Dec 2007
Posts: 54
Rep Power: 16
quantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to allquantile is a name known to all
Default Re: A140 diode low power build

After trying it out in the dark I like it more and more.
Here is a crude attempt at a beam shot.


Last edited by quantile; 10-05-2010 at 09:54 PM. Reason: updated image link
quantile is offline   Reply With Quote
Old 10-04-2010, 08:39 PM #5
Prototype's Avatar
Class 3B Laser
 
Join Date: Jun 2009
Posts: 2,712
Rep Power: 107
Prototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond repute
Prototype Prototype is offline
Class 3B Laser
Prototype's Avatar
 
Join Date: Jun 2009
Posts: 2,712
Rep Power: 107
Prototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond reputePrototype has a reputation beyond repute
Default Re: A140 diode low power build

Crude? That's an awesome beamshot!
__________________
Quote:
Originally Posted by MoonShad0w
No, bird, do not bite my F7 key off
Prototype is offline   Reply With Quote
Old 10-04-2010, 08:44 PM #6
iFoSh's Avatar
Class 2 Laser
 
Join Date: Aug 2010
Location: Arkansas
Posts: 347
Rep Power: 11
iFoSh is a jewel in the roughiFoSh is a jewel in the roughiFoSh is a jewel in the rough
iFoSh iFoSh is offline
Class 2 Laser
iFoSh's Avatar
 
Join Date: Aug 2010
Location: Arkansas
Posts: 347
Rep Power: 11
iFoSh is a jewel in the roughiFoSh is a jewel in the roughiFoSh is a jewel in the rough
Default Re: A140 diode low power build

Dang....I'll take 2! Haha Very nice
__________________
iFoSh is offline   Reply With Quote
Old 10-04-2010, 08:55 PM #7
RA_pierce's Avatar
Class 3B Laser
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
RA_pierce RA_pierce is online now
Class 3B Laser
RA_pierce's Avatar
 
Join Date: Sep 2007
Location: Southern California
Posts: 3,258
Rep Power: 3873
RA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond reputeRA_pierce has a reputation beyond repute
Default Re: A140 diode low power build

Nice job.
What does the beam look like at that power?

When I was setting my "low power" 445 I started at 225mA and worked up from there. The diode would output only one narrow stripe up to ~50mW, then more modes would begin to appear. Right now it's set at ~150mW - the beam has one strong mode in the center and a couple faint modes on each side.

I do like having a lower power variant of the 445 much more than a Class IV. Its much more pleasant to play with.
RA_pierce is online now   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











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 07:35 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