Radar & Laser / Lidar information Pages
Stalker Lidar: Beam Sweep Example.
See the Stalker Beam Pattern here:
We've shown the laser diode is a 3 beam pattern.
Stalker LIDAR beam reflection off diagonal sign ~ 860 feet.
Here's proof on a street sign at ~860 feet.
I took the Stalker LIDAR and at night,
shot the side of the wagon to show the beam pattern in action, in the real world;
If the LEO could hold off to about ~100 feet.
Two lane road ~20 feet wide Target 120 then ~75 feet away: "cross-lane"
Here is the "square-ish" three beam pattern at ~75 feet.
Next to the drivers' side tail light.
Here I "sweep" into the tail light and towards the side doors.
I then hear the tone change, and check the LIDAR info back panel.
- 5 MPH (receding) @ 73 feet. So sweep from back to front confirmed.
"Night vision" shows the beam off the target but hinders in reading a backlit display up close.
So we sight the vehicle again and try again.........
+ 8 MPH (the "limit" of the "error trapping software" says the operators manual)
Sweep front to back of the vehicle is verified. Distance 75 feet.
Earlier, I got these similar readings from "Sweeping".
Above, we see the beam on the rear bumper cover.
+ 6 MPH at ~82 feet. So a front to rear sweep produced this reading.
Now the video is MUCH clearer than these
digital pictures taken off the camera side view screen.
and the calculated speeds CAN be higher than 10 MPH.
These are smooth, SLIGHT pans of the wrist. No jerks or quick motion.....
These are realistic, real world possibilities.
With the close distance, IMHO the "compactness" of the beam illustrates the EASE
of which this can happen.
The FURTHER out the beam spreads, the MORE surface area the beam covers
and sweep and panning become part of the act of targeting a vehicle.
Its UNAVOIDABLE.
Here's another reflection / panning example:
Although the Stalker operators manual claims the limit of a sweep or panning error is 8 MPH.
I can go farther than that indoors off a double hung, double paned house window.
(just for comparison the LTI Marksman doesn't act like this, it gets legit readings)
Just aim it out the window. The pane is about 3 - 4 feet away.
Oh, 10 MPH, that's more than the error trapping software is supposed to allow.....
Sweep, panning errors and beam bounce are all influences on LIDAR.
The Truth about LIDAR.com