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 > Experiments & Modifications



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



Reply
 
LinkBack Thread Tools Display Modes
Old 09-27-2013, 06:38 PM #1
lzrppl's Avatar
Junior Member
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
lzrppl lzrppl is offline
Junior Member
lzrppl's Avatar
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
Default IR laser illumination for covert night time viewing of targets

I am starting this thread to discuss mounting and using IR laser diodes to illuminate night time targets and viewing these targets with IR viewing scopes or goggles. My employer designs and builds high tech scopes for rifles. Basically, these scopes are video camera / computer devices that can tag and track targets up to 10mph. Once the target is tagged, one would bring the crosshairs to the tagged dot and when they are overlapped the shot is taken. This setup has proven repeatable accuracy up to 1200 yards. Also, most all image sensors or CCDs can “see” in the near IR. Lately, we have been interested in night time hunting of wild boar that seem to be taking over my state.

The problem…getting close enough and seeing what you are shooting at. Since March I have been experimenting with different laser diodes and driving circuits. The task was to create basically a handheld IR laser that can be mounted to a rifle. Being that almost all IR diodes are case positive, this presented a few problems. The choices are to either isolate the diode from the host or use a continuous positive driver like the BlitzLinear and put the batteries in reverse causing the host case to carry the positive charge. The latter is easiest if you have determined what current level you need to run at.

I actually prefer diodes that have beam characteristics that have a fast and slow axis instead of a “dot”. This type of beam profile projects a rectangular beam that is great for illumination. The beam is never focused to a point, but rather defocused and adjusted to control the divergence or size of the illumination “window”. I have also discovered that when using IR viewers, the intensity required to illuminate favorably would be different for various Gen1 through Gen3 devices. This introduced the need for varying intensity output instead of 4 or 5 different illuminators. Go out in the field, test and adjust to what intensity works best for your device. Then take a power reading and build a fixed current illuminator for that particular viewer.

How would someone build a laser illuminator with dynamic intensity control that can be changed on the fly in the field? I attacked this problem using LED drivers. In particular, I used the LuxDrive Buck Puck with onboard trim and external pot. This is nice because the onboard trim can be the current range you want from 40% to 110% of the rated drive and the external pot is used to adjust from 0 to 100% of that range. We are not talking PWM, but actual smooth current adjust. These drives come as 350, 500, 700 and 1000ma drives. $17 for the drive and $5 for the wiring harness including the pot from LED Supply. Now this is larger than any drivers that fit in most hosts, so the first prototype looks Frankensteinish. I had to actually glue the drive to the exterior of the host and run wires through a milled slot I created in the host. I also glued the pot to the host for easy access. In the near future, I will probably tuck this drive up into the bored out backside of a Heatsink and install the pot through the host wall. The diode I used for the prototype was a reject 1/2W 808nm which ended up being 675mw at 803nm. So, this one prototype can adjust its intensity from 0mW to 675mW. Now, this is really handy for visible lasers that are too bright to align properly. LuxDrive also make a device called a BuckBlock which comes in 1000, 1400 and 2100mA range. These are too big for portable hosts, but are great for benchtop projects with full dimming capabilities and are only $18.

Right now, my prototype is out in the field, but when I get it back I will take some photos and figure out how to post them. I want to keep this thread open so I can continue to add relevant info as I progress.



Last edited by lzrppl; 09-27-2013 at 06:42 PM.
lzrppl is offline   Reply With Quote







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







Old 10-22-2013, 01:15 AM #2
lzrppl's Avatar
Junior Member
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
lzrppl lzrppl is offline
Junior Member
lzrppl's Avatar
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
Default Re: IR laser illumination for covert night time viewing of targets

I know it has been awhile, but I have been very busy. Not only am I trying to create a new product but the whole company is moving across town to a new facility. I did get my hands back on my original prototype and took a few photos.
I like to use Solarforce flashlight parts for my hosts. They are inexpensive and easily modified on a lathe. As mentioned before, the prototype is monstrous in it's appearance but quite functional. These photos show the "business end" of the laser. Machined heatsink and electrode along with machined delrin for isolation...all designed around Solarforce parts. The last photo is of the whole mountable laser with it's battery compartment for two 18650 batteries.









Next Post:
Sharper looking hosts
How am I going to make this safe?
What am I going to do about the Feds?
How am I going to comply?
lzrppl is offline   Reply With Quote
Old 10-22-2013, 12:59 PM #3
The Lightning Stalker's Avatar
Class 3B Laser
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
The Lightning Stalker The Lightning Stalker is offline
Class 3B Laser
The Lightning Stalker's Avatar
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
Default Re: IR laser illumination for covert night time viewing of targets

Looks like a nice build. FWIW, you can make any adjustable driver dimmable. (and some fixed ones as well) All you have to do is remove the original trimmer and wire your two pots in series. Optionally, you
can replace the one with a resistor when the optimal value is determined.
__________________
ALL NEW MEMBERS MUST READ THIS!!! --> http://www.laserpointersafety.com

"Where, now, is the way by which the light distributes itself" - Job 38:24

YouTube Channel
The Lightning Stalker is offline   Reply With Quote
Old 10-22-2013, 06:44 PM #4
lzrppl's Avatar
Junior Member
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
lzrppl lzrppl is offline
Junior Member
lzrppl's Avatar
 
Join Date: Oct 2012
Location: Austin, Texas
Posts: 11
Rep Power: 0
lzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to alllzrppl is a name known to all
Default Re: IR laser illumination for covert night time viewing of targets

Oh yeah...I will try that next. That sounds nice and easy.

Thanks
lzrppl is offline   Reply With Quote
Old 10-24-2013, 08:39 PM #5
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 264
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: IR laser illumination for covert night time viewing of targets

Might see if a 501B heatsink will fit the solarforce host as-is. A few members here sell these heatsinks for somewhere around the $20-25 range. Then, can use the same mini or 17mm drivers and 12mm "aixiz" modules that we use here on LPF

Use of a 17mm round and you might could get away with flashlight drivers, which would be mode-selectable in some cases. Also, flashlight drivers are cheap @ a buck or two each, and are often low drop-out linears (but often are on the ground side, using the amc7135)

"ahorton" 27mm aspheric lens would be interesting to try too, but wouldn't be focusable. But would be safer because of larger beam at aperture, and the lesser quality of molded vs ground lens.

Just throwing ideas at you. I make no claims as to how good any of these ideas are; the are merely ideas.

Last edited by BShanahan14rulz; 10-24-2013 at 08:43 PM.
BShanahan14rulz is offline   Reply With Quote
Old 11-04-2013, 04:10 AM #6
Junior Member
 
Join Date: Nov 2013
Posts: 1
Rep Power: 0
davidmikky is on a distinguished road
davidmikky davidmikky is offline
Junior Member
 
Join Date: Nov 2013
Posts: 1
Rep Power: 0
davidmikky is on a distinguished road
Default Re: IR laser illumination for covert night time viewing of targets

These photos show the "business end" of the laser. Machined heatsink and electrode along with machined delrin for isolation...all designed around Solarforce parts. The last photo is of the whole mountable laser with it's battery compartment for two 18650 batteries.
__________________
.......Em Crazy..........
davidmikky is offline   Reply With Quote
Old 11-04-2013, 04:20 AM #7
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,184
Rep Power: 4058
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is offline
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,184
Rep Power: 4058
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: IR laser illumination for covert night time viewing of targets

Remember -- In a BAD situation, the illuminator marks
your position to another "scope".
HMike
__________________
It's a dog's life
Hemlock_Mike 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











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 01:45 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