Discussion
Avon and Somerset Scamera Pratnership were boasting about their new upgraded scamera vans for just this purpose:
www.safecam.org.uk/news/news_story.asp?id=241
So, I'd say that yes they can get you at night
www.safecam.org.uk/news/news_story.asp?id=241
So, I'd say that yes they can get you at night
gopher said:
Anyone know what method the cameras use to see past the headlights to view the number plate?
Infra red and the reflectivity of your plate makes it a cinch.
My front plate on the other hand doesnt reflect and ANPR dosent pick it up either...i should know, i got followed and pulled by the peelers when they didnt get a "Hit".
Didnt say nothing about the plate though cos the ANPR dosent give a reason for "no lock on".
DeltaFox said:Yup. the retro type reflector behind the numbers will always return light/IR to the direction from where it came. Its like having a perfectly angled mirror all the time (for all directions). The camera/sensor may show the VRM being brighter than the (dipped) headlamps.
Anyone know what method the cameras use to see past the headlights to view the number plate?
Infra red and the reflectivity of your plate makes it a cinch.
parrot of doom said:Assuming this is to make the VRM more difficult to read: The characters on the front of the plate would still be seen to be black as they would absorb the light from these bulbs, hence the VRM would still be easily readable. (unless I missed the point here).
I wonder what would happen then if you bought a backlit numberplate (white) and shoved some big old bulbs behind it, but only giving out IR?
A better solution would be to have the characters of the VRM transparent to IR (no IR bulbs needed); they would be invisible when illuminated with an IR lamp. Best bit is, in the case of a pull, they would look normal when checked with the naked eye under normal light.
Not sure if I should post this......too late
supraman2954 said:How would achieve such a ... cunning arrangement?
A better solution would be to have the characters of the VRM transparent to IR (no IR bulbs needed); they would be invisible when illuminated with an IR lamp. Best bit is, in the case of a pull, they would look normal when checked with the naked eye under normal light.
And DeltaF - what did you do to your front plate so that it achieved such magical properties?
Oli.
supraman2954 said:
gopher said:
Anyone know what method the cameras use to see past the headlights to view the number plate?
Infra red and the reflectivity of your plate makes it a cinch.
Yup. the retro type reflector behind the numbers will always return light/IR to the direction from where it came. Its like having a perfectly angled mirror all the time (for all directions). The camera/sensor may show the VRM being brighter than the (dipped) headlamps.
Doesn't glass block IR signals?
zcacogp said:Easy, buy appropriate material, cut it out, stick it onto a blank! I found an online supplier very quickly.
A better solution would be to have the characters of the VRM transparent to IR (no IR bulbs needed); they would be invisible when illuminated with an IR lamp. Best bit is, in the case of a pull, they would look normal when checked with the naked eye under normal light.
How would achieve such a ... cunning arrangement?
Let me know how you get on
gopher said:
Doesn't glass block IR signals?
Glass will block (far) IR, but is usually transparent for near IR (typical laser speedgun wavelength).
If glass blocked all IR, how would laser speedguns function? (they use collimating lenses)
edited for typo
>> Edited by supraman2954 on Tuesday 29th March 19:17
supraman2954 said:
I wonder what would happen then if you bought a backlit numberplate (white) and shoved some big old bulbs behind it, but only giving out IR?
Assuming this is to make the VRM more difficult to read: The characters on the front of the plate would still be seen to be black as they would absorb the light from these bulbs, hence the VRM would still be easily readable. (unless I missed the point here).
A better solution would be to have the characters of the VRM transparent to IR (no IR bulbs needed); they would be invisible when illuminated with an IR lamp. Best bit is, in the case of a pull, they would look normal when checked with the naked eye under normal light.
Not sure if I should post this......too late
Been there, done that..T shirt anyone?
supraman2954 said:
supraman2954 said:
A better solution would be to have the characters of the VRM transparent to IR (no IR bulbs needed); they would be invisible when illuminated with an IR lamp. Best bit is, in the case of a pull, they would look normal when checked with the naked eye under normal light.
How would achieve such a ... cunning arrangement?
Easy, buy appropriate material, cut it out, stick it onto a blank! I found an online supplier very quickly.
Let me know how you get on
Call me a thickie if you like but what sort of search words would one use to discover this magic material
Boosted.
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