Valentine One V1 Gen2, Owner'S Manual

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What you should know about laser
How Traffic Laser Works
To measure speed, traffic laser sends out a beam of pulsed infrared light. The
beam is tightly focused: at a range of 1000 feet, it’s only about four feet wide.
Infrared is invisible to the naked eye—the operator can’t see it and neither
can you. But it is light and it behaves accordingly. It travels in straight lines.
And it’s easily reflected.
Traffic laser works as a rangefinder. It sends a pulse, then waits for the
reflection from the target car. From the time needed for the pulse to go out
and back, and from the speed of light, it calculates distances to the car.
These pulses are sent frequently, up to 500 times a second. The changing
distance to the target over time is speed.
Laser can’t see over hills or through opaque objects. The laser beam must hit
your car directly, line-of-sight from the laser gun, to measure speed. Under
ideal conditions, it can read speed in less than one second.
The pencil beam means that, in operation, laser is very different from radar.
Radar cannot single out one vehicle in a pack, so the speed reading is usually
attributed to the leader. The narrow laser beam reads only the vehicle
it strikes.
How Laser Detectors Work
A laser detector is an electronic sensor calibrated for the infrared wavelength
used by traffic laser. It is extremely sensitive. And it responds in as little as
.006 seconds.
It should be mounted inside the car with the sensor facing through the glass
toward the laser. When the beam, or scatter from the beam, strikes the
detector, it warns instantly.