Police laser how does it work

A laser speed gun measures the round-trip time for light to reach a car and reflect back. Light from a laser speed gun moves a lot faster than sound -- about ,, feet per second ,, meters , or roughly 1 foot 30 cm per nanosecond.

A laser speed gun shoots a very short burst of infrared laser light and then waits for it to reflect off the vehicle. The gun counts the number of nanoseconds it takes for the round trip, and by dividing by 2 it can calculate the distance to the car.

If the gun takes 1, samples per second, it can compare the change in distance between samples and calculate the speed of the car. By taking several hundred samples over the course of a third of a second or so, the accuracy can be very high. The advantage of a laser speed gun for the police anyway is that the size of the "cone" of light that the gun emits is very small, even at a range like 1, feet meters.

In terms of speed accuracy, all of the above manufacturers claim that the speed measurement is within 1 mile per hour. Though perhaps irrelevant for a discussion of policing, most laser and radar guns have a maximum measuring speed of about to miles per hour. Once they detect the pattern, they transmit a similar series of laser pulses that are intended to confuse the gun and prevent an accurate reading. Laser jammer manufacturers are always working on software updates to support the newest anti-jamming technologies.

If you are interested in learning about the technologies that are available for your car or truck to prevent officers from using laser guns to measure your speed, drop by your local specialist mobile enhancement retailer today.

They can explain the solutions they carry and how they can install them on your vehicle. As always, we ask that you drive safely and obey all traffic laws on your next adventure or commute. This article is written and produced by the team at www. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media. Your email address will not be published.

So now Im thinking: what if you use a laser jammer mentioned in your article against this automatic speed detection system — the police officer will not even see that I am jamming his signal since he is sitting in a parked car eating a donut? Can a laser gun ,detect the color of your vehicle? I got a ticket the other day in my black truck.

On the ticket he wrote it was grey. Just curious. You say that they need to be stationary but evidently something changed can you follow up on that on youtube??? Would be appreciated. Laser can ONLY be used when stationary. There are some sources of false laser alerts that are not police officers. This site uses Akismet to reduce spam.

Learn how your comment data is processed. Email address:. Made with by Graphene Themes. Police officer shooting laser. This website contains affiliate links. Vortex on September 5, at am Author Reply You can mount a radar detector and laser jammer on your bike.

Andrew on September 15, at am Reply Speed of light is not k mph. Vortex on September 15, at pm Author Reply lol whoops! Thanks for pointing out my mistake! Louie on February 4, at am Reply Great article! Vortex on February 4, at am Author Reply No you can not be jailed for having a laser jammer. Louie on February 4, at am Reply??? Vortex on February 4, at pm Author Reply Links to something concrete would indeed be helpful. Mark Liddell on October 2, at am Reply What if any complications are there from using a laser Lidar detector at night.

Vortex on October 3, at am Author Reply Nope. Gary on November 9, at pm Reply illegal and being arrested are different. Sam Green on January 1, at pm Reply Recently I was stopped for speeding and I was not speeding, I did however hit the pedal hard enough to get around an improperly covered work truck spewing rocks, shells and whatnot, and this got the officers attention. Vortex on January 1, at pm Author Reply Wow, glad to hear your dashcam was able to assist you on the spot like that!

Andrius on January 14, at pm Reply Hello, Vortex, great article which helped to understand laser vs. Rick on February 29, at pm Reply Can a laser gun ,detect the color of your vehicle? Leave a Reply Cancel reply. Search for:. Uniden R7. Facebook Reviews. See all reviews Write a review. Katheleen C.

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Tom Logan I. How can police pinpoint one vehicle? Police laser beams are narrow and very accurate, measuring roughly 18 — 36 inches in diameter at a distance of 1, feet.

Think of a police laser beam like a flashlight beam; if you face a wall with a flashlight from a few inches away, the beam is very small and concentrated. However, as you move away from the wall, the beam grows larger.