Steve,
You are right about the color of paint, as a white car reflects the most amount of light rays in the light spectrum, a flat black car absorbs the most amount of light. According to the LIDAR training manual, this will not affect the accuracy, however could slightly reduce the range.
Second, any jamming device that emits a radio signal that is in the range of RADAR and LIDAR systems (24.15 gigahertz and 330 Terahertz) would have to be regulated by the FCC. All police agencies that use RADAR or LIDAR have a FCC certificate on file. From the National Highway Traffic Safety Administration " the FCC will not license a device whose purpose is to jam police RADAR. Even when using an already licensed radio transmitter would violate federal regulations if used to jam police RADAR".
What BnB said about the angle of the "camera" is not the case. The angle from a "k" bands (APB/Tomcat,Kustom/Falcon,Decatur Genesis) is 12 degrees from the gun. That angle spreads the beam out at a rate of 10.5 feet for every 50 feet traveled downrange. The ka band RADAR (Stalker) has a angle from the gun of 9 degrees. so the beam width is 7.9 feet wide for every 50 feet downrange. As you can see, a front license plate cover has little effect on a RADAR.
The beam for a Kustom Laser is 45mm at the lens or 4 feet at 1000 feet. The beam of a Stalker laser is 3 feet at 1000. That is what those plate covers were made for, however the LP is not the only place to shoot the laser.
The other angle effect is talking about the cosine angle that the beam coming from the gun hits the target. That angle is the angle of the gun the officer holds it at. That is why they get as close to the roadway and then point it as parallel to the roadway as possible. If the angle of the gun to the target is less than 10 degrees it is not a factor. Any more than 10 degrees could actually be in favor for the violator.
Example:
the angle of the gun to the roadway is 5 degrees
the car is travelling at 50 mph
the RADAR would read 49.81 mph
The RADAR would display 50 mph
The angle of the gun to the roadway is 10 degrees
the car travelling at 50 mph
the RADAR would read 49.24 mph
the RADAR would display 49 mph
Remember that most officers first make a visual observation of the speed of the violator, than confirm the speed with RADAR/LIDAR. The gun only emits a signal when activated and does not always emit the signal.
Long story short..slow down before the top of the hill and watch those known spots that Officers observe traffic.
Remeber that the Supreme court of Pennsylvania in 1906 affimed the conviction under a city ordinance of speeding over 7 mph.
the court said "It is only necessary to resort to the most cursory observation to find the evidence that many drivers of automobiles in their desire to put their novel and rapid machines to a test of their capacity, drive such vehicles through the streets with a reckless disregard of the rights of others". (Brazier v. City of Philadelphia 215 Pa. 297, 64 A 508, 510 (1906) That was for Jamo
Have a nice day
Todd