Osprey Laser Ranger Finder with Speed reading

The monocular unit.

The rubber over the eye piece folds flat for easier eye locating.

The battery door needs a tiny #1 Phillips head screwdriver.

Battery Compartment opened and tripod screw plug removed.


How it works:

Sighting through the view finder the crosshairs "aim" the LIDAR pulses.

A speed reading on this unit with a " - " is a target moving towards the operator.

Pressing the "Action" button on top of the unit will send pulses towards a target.

See the lightning bolt in the corner?  Its sending pulses to "clock" a vehicle.

Notice the two "rectangular" boxes.

these show that although the traffic moves fairly straight to and from the operator

the chance to get reflections from the side of the vehicle

(increasing its distance ~16 / 19 feet or so)

is a VERY REAL skew to the return data of the LIDAR units.

This can also be shown above as the roof, trunk and rear bumper valence

all reflect light back and ALL are different distances.....

***  The slope of the front of any car is GREATER than the rear on most cars ***


Actual shots of traffic and objects:

The above PT cruiser is in the cross hairs and reads 36 MPH, seems close.

39 MPH, was aiming at the trunk area.

just like this Subaru.  Pressing the "Action" button readies for the next shot.

Depressing the "action" button a second time after "ready" sends LIDAR pulses

as shown in the upper corner by the lighting bolt symbol.

Here the "Error" message says the data stream was interrupted: "lose"

UPS guy at 32 MPH

F150 Pick up truck at 29 MPH with the tailgate down.

29 MPH is popular at this part of the road and is completely reasonable

speed reading when comparing it to the area traffic history. The road is posted 25 MPH.


ERROR readings

There were PLENTY of them.

That's reasonable for the pavement: 868 MPH.


I think this sequence goes together.  Before:

After "clocking" the road surface.

Now there was a wind gust just as I snapped this frame from the video.

But the reading is of the road surface between the blowing leaves and me.

336 MPH, yeah right.

56 MPH.......Hmmmm more reasonable?

No one around to cause that reading..............

66 MPH off the street

Conclusion:

LIDAR, as the technology works has the reasonable chance of producing an

errant reading even with "correction" software in place and "error codes."


Beam Pattern

Here I've compared the actual Osprey LIDAR beam of infared light

to that of a police issue LTI Marksman 20 / 20:  Door ~ 6 feet.

   


A license plate at 32 feet indoors:

Osprey

LTI:


A license plate at ~100 feet outdoors:

Osprey:

 

LTI:

 

 

 

Optics Size:

Osprey:

LTI Marksman:

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