[raqball]

Originally Posted by scythezo6

Laser is godmode for speed detection. Im pretty sure, based on physics, that laser is the end all for speed detection. Laser, along with all electromagnetic radiation, is the fastest thing we know of. The only differnce is laser light is more focused. By the time the officer shoots the laser, it hits your car and bounces back into the speed detector your car has maybe only moved less than a inch. And by then the laser has made hundreds of speed measurements. Thats way to late to react. Most laser guns take several readings per second. So based on that, as long as the cop can keeping a steady aim on you all he has to do wait for just one fraction of laser light to be reflected back and you're done. Unless you have the money and don't mind breaking a few laws you absolutely cannot legally (physically) make your car undetectable to lasers. Anyone know the physics behind these laser shifter/blocking things you're posting charts about? It seems pretty bogus to me. I think the money is better spent elsewhere.

False, false, and more false..... Shifters / LASER jammers ARE NOT against Federal law... Please educate yourself...

RADAR JAMMERS (illegal under Federal Law)

Radar Jammers are transmitters tuned to interfere with ("jam") a radar signal. The intentional use of jammers is considered "malicious interference" and is strictly prohibited by the Communications Act of 1934, as amended, as well as by FCC Rules. Anyone using a jammer risks such penalties as losing an FCC license, paying a fine, or criminal prosecution.


The Communications Act of 1934 states:

Sec. 333. Willful or malicious interference. No person shall willfully or maliciously interfere with or cause interference to any radio communications of any station licensed or authorized by or under this Act or operated by the United States Government.

(June 19, 1934, ch. 652, title III, Sec. 333, as added Pub. L. 101-396, Sec. 9, Sept. 28, 1990, 104 Stat. 850.)


Sec. 501. General penalty

Any person who willfully and knowingly does or causes or suffers to be done any act, matter, or thing, in this chapter prohibited or declared to be unlawful, or who willfully and knowingly omits or fails to do any act, matter, or thing in this chapter required to be done, or willfully and knowingly causes or suffers such omission or failure, shall, upon conviction thereof, be punished for such offense, for which no penalty (other than a forfeiture) is provided in this chapter, by a fine of not more than $10,000 or by imprisonment for a term not exceeding one year, or both; except that any person, having been once convicted of an offense punishable under this section, who is subsequently convicted of violating any provision of this chapter punishable under this section, shall be punished by a fine of not more than $10,000 or by imprisonment for a term not exceeding two years, or both.

(June 19, 1934, ch. 652, title V, Sec. 501, 48 Stat. 1100; Mar. 23, 1954, ch. 104, 68 Stat. 30.)


Sec. 510. Forfeiture of communications devices

(a) Violation with willful and knowing intent

Any electronic, electromagnetic, radio frequency, or similar device, or component thereof, used, sent, carried, manufactured, assembled, possessed, offered for sale, sold, or advertised with willful and knowing intent to violate section 301 or 302a of this title, or rules prescribed by the Commission under such sections, may be seized and forfeited to the United States.

LASER JAMMERS (Laser jammers are illegal in California, Oklahoma, Utah, Colorado, Minnesota, Virginia, Illinois, Tennessee, South Carolina)

Currently there are no US federal laws prohibiting the use of laser jammers.
However, some states have passed their own laws against jamming police laser guns.

And to answer your question on how a Laser Gun works....

Laser guns do not use the Doppler principle like radar guns do. Instead, they use "time difference of arrival". The laser gun sends out a pulse, and calculates the "time of flight" for the pulse to be reflected back to the laser gun. Since the speed of light is a known value, the distance between the laser gun and it's target can be calculated by the time of flight. The laser gun takes multiple distance measurements, and by comparing the different distance measurements over time, it can determine the speed of the target.

And to answer your question as to how a Laser Shifter / Jammer works...

Generally speaking, the jammer must first recognise that it is being shot at. Then it must determine what kind of gun is shooting at it. Then it must fire back with the appropriate beam, at the appropriate pulse-rate, as no two laser gun models are the same. And all of this must happen at the speed of light. As you can see, it is not simply a matter of shining light back at the laser gun. However, in the past there was one jammer -- The Lidatek LE10 -- that employed "brute force" of high intensity laser optics as part of the equation, which allowed it better success at blinding a laser gun. Guns are more sophisticated these days though, so the "brute force" concept remains a valid adjunct factor, but cannot be reasonably relied upon as a sole manner of jamming laser. Consequently, don't fool yourself thinking that just adding a bunch of lights of any kind to your car is going to protect you.

One common misconception is that the laser beam from a police LIDAR gun is a very small, pinpoint beam, as common lasers are. It is not. The beam from police LIDAR, even at a very short distance, is several inches wide. At typical engagement distances (around 500 feet), the beam width is likely to cover the entire front end of your car. Consequently, simply protecting your licence plates and/or headlights with passive measures alone will not help you. The entire front end must be protected by a competent jammer.

As always, drive safe!!!!