IPC-HDW2231R-ZS Starlight cameras IR wavelength???
- Thread starter Nick70068
- Start date
bigredfish
Known around here
StratRider
Getting comfortable
I am having difficulty finding this information on a lot of the cameras. Starting to assume that if they don't post it in the specs, then it is 850nm.
This is starting to make me wonder if anyone sees a real world problem with being able to see the red glow of an 850nm?
I am wanting to get 2 cams for LPR and place them in a precarious position by the street and I do NOT want the kids that walk out there to be able to see that glow.
This appears to now rule out the ones I had previously chosen. :-(
This is starting to make me wonder if anyone sees a real world problem with being able to see the red glow of an 850nm?
I am wanting to get 2 cams for LPR and place them in a precarious position by the street and I do NOT want the kids that walk out there to be able to see that glow.
This appears to now rule out the ones I had previously chosen. :-(
bigredfish
Known around here
Most all surveillance cameras use 850nm. Those that use 940nm shine about 1/2 of the 850nm. Dont overthink it.
sebastiantombs
Known around here
You can use 940nm but it will take a higher powered illuminator to get the same results as an 850nm, roughly double the power rating as a rule of thumb.
Another trick is to mount the illuminators separately from the cameras.
Another trick is to mount the illuminators separately from the cameras.
StratRider
Getting comfortable
The location of the cams would be right at the street and only about 7 ft high to get a great angle for LPR.
But the teenagers walking by won't see the cams unless there is the red glow - and then they would likely be destroyed.
Solution now would be to turn off the LED's and put an 850nm illuminator away from the cams or a 940nm close to the cams.
The distance to the plate will only be about 20 meters, so power shouldn't be an issue.
I had been searching forums since my first post and couldn't conclude that a 940nm illuminator will work with a standard 850nm cam though.
Thanks for the input.
But the teenagers walking by won't see the cams unless there is the red glow - and then they would likely be destroyed.
Solution now would be to turn off the LED's and put an 850nm illuminator away from the cams or a 940nm close to the cams.
The distance to the plate will only be about 20 meters, so power shouldn't be an issue.
I had been searching forums since my first post and couldn't conclude that a 940nm illuminator will work with a standard 850nm cam though.
Thanks for the input.
bigredfish
Known around here
Gonna have to choose one or the other I believe.
if they can see the camera, not sure seeing the LED"s will make much difference. Its not like a flashing stop light, they are very dim and only seen looking straight on
if they can see the camera, not sure seeing the LED"s will make much difference. Its not like a flashing stop light, they are very dim and only seen looking straight on
looney2ns
IPCT Contributor
I suggest you go to the LPR subject area and start studying what others have done.
This cam could be mounted further away from the road and still catch plates.
Review-Dahua IPC-HFW5241E-Z12E AI Varifocal Bullet | IP Cam Talk
This cam could be mounted further away from the road and still catch plates.
Review-Dahua IPC-HFW5241E-Z12E AI Varifocal Bullet | IP Cam Talk