Scameras in the wet
Discussion
Do LTI 20/20 as used by Wiltshire scamera partnership work in the wet, when it is absolutely tanking it down? I only ask 'cos on the a431 between Devizes and Avebury there was a scamera pointing down the road toward Avebury at about 16:40. I can't see how they could get a reliable reading, not worried iwas well under 60, but curious.
Seems like we were driving along the same bit of road, although I was at 17h10...http://www.pistonheads.com/gassing/topic.asp?h=0&t=451402
http://secure.safetycameraswiltshire.co.uk/content...
that's the location. like you said, great vis even in the wet, no dangerous junctions etc. crazy.
that's the location. like you said, great vis even in the wet, no dangerous junctions etc. crazy.
Edited by Nuclearsquash on Tuesday 16th October 20:27
Edited by Nuclearsquash on Tuesday 16th October 20:28
Nuclearsquash said:
i shall bare that in mind, i suppose the other question is, can the operator be guaranteed to have got an impression of speed given heavy spray, light conditions, both dark, and dazzling headlights/taillights.
haha impression of speed. They dont do that any more (although they are supposed to). I got picked off at 81 on an empty NSL DC by a van hiding on the second of two bridges , he could only 'shoot' me as I appeard from beind the first bridge into his line of sight , and to get me before I passed he'd have to shoot me as soon as my wheels came into his view , bridges very close together and no vis possible down the DC from where he was parked 
tsParrot of Doom said:
Laser light has no issues getting through rain, it'll happily travel as far as visible light. Which basically means if you see the van when its lagging down, the van can see you.
Incorrect.The light travels twice as far... you know... it gets sent... bounces off the car and returns... please think before posting.
In addition lasers rely on a 'cohesive' form of light to ensure the integrity of signal, scatter depletion is not good and CAN give a bad reading, the units need to be calibrated very regularly for use in rain.
Brother Mycroft said:
Parrot of Doom said:
Laser light has no issues getting through rain, it'll happily travel as far as visible light. Which basically means if you see the van when its lagging down, the van can see you.
Incorrect.The light travels twice as far... you know... it gets sent... bounces off the car and returns... please think before posting.
In addition lasers rely on a 'cohesive' form of light to ensure the integrity of signal, scatter depletion is not good and CAN give a bad reading, the units need to be calibrated very regularly for use in rain.
Parrot of Doom said:
Brother Mycroft said:
Parrot of Doom said:
Laser light has no issues getting through rain, it'll happily travel as far as visible light. Which basically means if you see the van when its lagging down, the van can see you.
Incorrect.The light travels twice as far... you know... it gets sent... bounces off the car and returns... please think before posting.
In addition lasers rely on a 'cohesive' form of light to ensure the integrity of signal, scatter depletion is not good and CAN give a bad reading, the units need to be calibrated very regularly for use in rain.
From what I am aware, the laser devices *can* work in the rain although it does make it slightly more difficult to get the laser light back enough to get a 'reading'.
JustinP1 said:
Parrot of Doom said:
Brother Mycroft said:
Parrot of Doom said:
Laser light has no issues getting through rain, it'll happily travel as far as visible light. Which basically means if you see the van when its lagging down, the van can see you.
Incorrect.The light travels twice as far... you know... it gets sent... bounces off the car and returns... please think before posting.
In addition lasers rely on a 'cohesive' form of light to ensure the integrity of signal, scatter depletion is not good and CAN give a bad reading, the units need to be calibrated very regularly for use in rain.
From what I am aware, the laser devices *can* work in the rain although it does make it slightly more difficult to get the laser light back enough to get a 'reading'.
The light [LASER light] has to trvel [cohesively] twice as far as random photons that strike our eye [which do not need to be cohesive]
Because a LASER is both source and receptor any light it emits needs to travel twice as far as the photons that make up the image in our retina.
Some many years ago, I had a Renault Alpine A610 turbo (they won their Le mans class, and a car that J Clarckson said was "fantastic", they sold 28 in the UK [clarckson= kiss of death to manufacturers])
It was an out and out racer, 0-60 in 4.3secs, top speed 175.
I was exploring its potential on a certain west Wales road and rapidly overtaking a caravan, when to late I saw the "Safety Camera" van, it was bi-lingual!.Sod! I said in Welsh, but being curious I doubled back and parked in front (it was a public layby) just to "check".My real intention being to "torch" it, but there was an officer inside getting somewhat irrate.
The real question is since the rear window's aperture was open and it being a laser unit, I assume that this cannot be either legally or technically operated through an obstruction such as a closed window glass.
Comments please.
P.S.
The caravan had obviously obscurred his view.
It was an out and out racer, 0-60 in 4.3secs, top speed 175.
I was exploring its potential on a certain west Wales road and rapidly overtaking a caravan, when to late I saw the "Safety Camera" van, it was bi-lingual!.Sod! I said in Welsh, but being curious I doubled back and parked in front (it was a public layby) just to "check".My real intention being to "torch" it, but there was an officer inside getting somewhat irrate.
The real question is since the rear window's aperture was open and it being a laser unit, I assume that this cannot be either legally or technically operated through an obstruction such as a closed window glass.
Comments please.
P.S.
The caravan had obviously obscurred his view.
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