Brute force laser jammers (1 Viewer)

THX1138

Premium RDF Member
Advanced User
Premium Member
Joined
Nov 4, 2010
Messages
676
Reaction score
394
Awards
0
Location
Sunshine State
Even at 940nm, you should still get some output around 904nm. It would be an interesting experiment to see if lidar acquisition range could be reduced. I'm doubtful that it would help with a short range shot.
 

PointerCone

M3 Kng
Advanced User
Lifetime Premium Member
Joined
Aug 5, 2011
Messages
23,113
Reaction score
22,767
Awards
0
OK, help me out here. This spotlight from Rigid produces at the invisible spectrum. Are you still able to see what it illuminates with the naked eye or are there glasses that you need as well?? This would be great for boating at night since you're technically not allowed to use visible spotlights in the presence of other vessels.
 
Last edited:

poop

Paging Dr. Howard, Dr. Fine, Dr. Howard.
Advanced User
Premium Member
Joined
Nov 17, 2014
Messages
942
Reaction score
871
Awards
0
Location
Hudson Bay
OK, help me out here. This spotlight from Rigid produces at the invisible spectrum. Are you still able to see what it illuminates with the naked eye or are there glasses that you need as well?? This would be great for boating at night since you're technically not allowed to use visible spotlights in the presence of other vessels.
It sounds like it's used to illuminate an area in IR allowing people with IR goggles to get a better visual on things. Like how the old IR military stuff still required an IR light source.
 

PointerCone

M3 Kng
Advanced User
Lifetime Premium Member
Joined
Aug 5, 2011
Messages
23,113
Reaction score
22,767
Awards
0
It sounds like it's used to illuminate an area in IR allowing people with IR goggles to get a better visual on things. Like how the old IR military stuff still required an IR light source.
So without a scope or binoculars, you arent seeing anything..............

Ive been looking at Gen 2 for monocular but they are pricey!!
 

poop

Paging Dr. Howard, Dr. Fine, Dr. Howard.
Advanced User
Premium Member
Joined
Nov 17, 2014
Messages
942
Reaction score
871
Awards
0
Location
Hudson Bay
So without a scope or binoculars, you arent seeing anything..............

Ive been looking at Gen 2 for monocular but they are pricey!!

Go get one of these relics instead: an active IR scope (battery pack not in picture) That big round thing on the top was the IR source for the shooter. :) Of course if the enemy had similar gear, he could spot this quite easily...


active.IR.scope.XM21 w-Pan4 L.jpg
 
Last edited:

kyle13

PSL +5
Intermediate User
Joined
Mar 16, 2016
Messages
428
Reaction score
249
Awards
0
They might provide some lag in acquiring your speed but they probably wont jam, the gun would just filter out the pulses sent back and get your speed.
 

NucRdr

Learning to Drive
General User
Joined
Jan 30, 2016
Messages
45
Reaction score
53
Awards
0
Location
Seattle, Washington
The jammer shouldn't transmit at anything other than 940nm, as laser light is created through a diode specially designed to resonate and transmit at a specific frequency, and most current LIDAR guns should be able to distinguish their own signals, or to at least throw a jam code because of being overloaded. You could still see the IR light through a camera. Vortex has a great video on how brute force jammers work: https://www.youtube.com/watch?v=RYuqstFQ3BI but I think a big difference is that lidar brute force jammers send continuous pulses and not a continuous beam of light, which means that most of its effectiveness would be outside of modern LIDAR guns' windows for speed acquisition. As a result, it would most likely be useless against most modern guns. However, with all of that said, it's mainly theoretical and it would be pretty interesting to test and see results!
 

bslaws

Premium RDF Member
Advanced User
Premium Member
Joined
Mar 8, 2016
Messages
1,264
Reaction score
2,317
Awards
0
Location
Land of Spuds and Gems
The jammer shouldn't transmit at anything other than 940nm, as laser light is created through a diode specially designed to resonate and transmit at a specific frequency, and most current LIDAR guns should be able to distinguish their own signals, or to at least throw a jam code because of being overloaded. You could still see the IR light through a camera. Vortex has a great video on how brute force jammers work: https://www.youtube.com/watch?v=RYuqstFQ3BI but I think a big difference is that lidar brute force jammers send continuous pulses and not a continuous beam of light, which means that most of its effectiveness would be outside of modern LIDAR guns' windows for speed acquisition. As a result, it would most likely be useless against most modern guns. However, with all of that said, it's mainly theoretical and it would be pretty interesting to test and see results!
Did you mean 904nm? So my main question is if the lidar gun is being blinded or overpowered by a non pulsed or reflected source ( I realize they will see an error or jam) and couldn't see their own reflected signal, wouldn't this give additional time to reduce speed? I guess this would interfere with normal parking sensor operation as they too would see this. My though is you aren't running parking senors, just some fancy driving lights. What's the harm in that? They certainly aren't illegal. I would compare this to the errors we receive on ALPs when driving directly in to rising or setting sun.
 
Last edited:

pipinos1976

PSL +5
Intermediate User
Joined
Jun 12, 2011
Messages
290
Reaction score
279
Awards
0
The answer is yes. If the LIDAR gun is overpowered it can't distinguish it's own pulses through the light barrage. This could give you enough time to slow down if you had a receiver that 100% of the time gives you correct warnings.

BUT, and here is the tricky part, this could work only to a certain scenario where the Tx is far away from the target. It's much like the old Radar Jammers that provided protection to aircrafts up until the breakthrough (BT) point where the reflection of the target has more power than the noise transmitted by the plane to cover it's track. I can analyze it a little more. When you send a signal from the gun (pulses to be exact) this signal has to do the following trip: gun-target-gun. Thus, the signal is reduced by the power of 4. The signal that the target (car, aircraft etc) transmits has to travel only the distance from the traget to the gun. Thus, it's reduced by the power of 2. As we get closer to the transmitter (gun) the reflection from the target (car) is getting bigger and bigger faster than the power produced by our jammer (in this case the light source). There is a certain point where the reflection has more power* than the light we transmit and the gun will get the speed.

Now, lets be more practical. It's impossible to give certain numbers since the reflection of the target and the transmitted power is a variable factor (different cars and guns). So, in Europe (I can talk about Greece at least) where they try to acquire speed at the far edge of the gun's capabilities such a solution could work. In USA where LEOs clock speed under 1000ft (about 300m) I highly doubt that's possible to use such a countermeasure.

* It doesn't have to be a high powered gun. It only needs high peak power and fast pulse train to give higher mean power than the light source we use. Of course, if someone could make both high power and high pulse rate light source the guns would be defeated easily. By the current technology though it's impossible to make such a countermeasure since the power needed and the cooling part are way too big to use them in a small vehicle (car).
 
Last edited:

Users Who Are Viewing This Thread (Users: 0, Guests: 0)

Unregistered User Ad


ATTENTION: Want ads to disappear? Register for an account here - it's free and NO ADS ARE DISPLAYED TO REGISTERED MEMBERS! Thanks!

Donation drives

RDF Server & License Fees (JULY 2019) (ACTIVE)

This donation drive covers the server and licensing fees for RDF for the month of July 2019...
Goal
$643.00
Earned
$179.00
This donation drive ends in

Latest threads

Latest posts

Social Group Activity

Forum statistics

Threads
84,018
Messages
1,257,632
Members
19,487
Latest member
helgoret
Top