SE Laser falsing from sunlight and washer fluid.

[Jag42]

I was taking my mom home on the highway just about a hour ago and on the way i sprayed my windshield with washer fluid. I was facing the sun and the Whistler alerted Laser every time i sprayed a shot of washer fluid for a total of 5 times in the ranges of 70-90 pps. First Laser false on the SE platform i have recieved. I turned back the same route on the way back to film and got Nothing ! I must have been at the right angle.

[MOPARado]

Yeah same here. I started a thread on this exact same thing a month or so ago.

http://www.radardetector.net/forums/...ser-false.html

MB never did reply though! My geuss is that the direct rays from the sun coupled with the thin film of fluid act as sort of a prism with the wipers maybe creating a pulsing effect. All this might screen through the right pseudo pulsed wave-lengths of light to trick the the detector into a laser alert. Just a geuss.
By the way people with other brands of detectors also said they had similar wiper/washer laser alerts.
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[Michael B]

Sorry, I guess I missed that thread.

Yes, I have had this happen also as strong direct sunlight typically low in the sky along with the moving water droplets can cause a situation that can briefly mimic the requirements for laser validation..

[<<JAZZY>>]

Can't you block out that pps on laser with your Whistler?

[Jag42]

Can't you block out that pps on laser with your Whistler?

Yes..But it is very rare

[MOPARado]

Can't you block out that pps on laser with your Whistler?

Jag42 is right at least in my experience also. It is rare in that the sun has to be at a direct and precise angle relative to the detector, the washers squirting along with the wipers. If any one of those conditions are not met, it doesn't happen.
Im my experience:
Rain + wipers + critical sunlight angle = doesn't happen.
Wipers alone + critical sunlight angle = doesn't happen.
Wipers + rain + windshield fluid + critical sunlight angle = doesn't happen.
Wipers + dry weather + windshield fluid + critical sunlight angle = laser alert.

The detergent agents plus other chemicals in windshield washer fluid probably have some kind of prism effect to separate out the sun's wavelengths directed at the detector.
If indeed the wiper movement causes the PPS 'effect', then blocking it out would depend on variations of wiper speeds and maybe some other variables.
I played around with this and the PPS varied wildly each time the alert went off.

Since its so rare, probably not even worth worrying about. Just interesting.
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[bigalinwv]

i can see it now, one hand on the wiper fluid switch, one on the mute button.

[v1user]

Can't you block out that pps on laser with your Whistler?

Jag42 is right at least in my experience also. It is rare in that the sun has to be at a direct and precise angle relative to the detector, the washers squirting along with the wipers. If any one of those conditions are not met, it doesn't happen.
Im my experience:
Rain + wipers + critical sunlight angle = doesn't happen.
Wipers alone + critical sunlight angle = doesn't happen.
Wipers + rain + windshield fluid + critical sunlight angle = doesn't happen.
Wipers + dry weather + windshield fluid + critical sunlight angle = laser alert.

The detergent agents plus other chemicals in windshield washer fluid probably have some kind of prism effect to separate out the sun's wavelengths directed at the detector.
If indeed the wiper movement causes the PPS 'effect', then blocking it out would depend on variations of wiper speeds and maybe some other variables.
I played around with this and the PPS varied wildly each time the alert went off.

Since its so rare, probably not even worth worrying about. Just interesting.
:

X2