I one a Logitech Quick CAM Express , CMOS sensor .
Is there any chance i can get that camera see it the dark ?? With some IR leds ? I take my remote control and pointed to it .. i can see the ir led .. so the camera can pick them up ..
I need urgent help ! Thanks.
Is there any chance i can get that camera see it the dark ?? With some IR leds ? I take my remote control and pointed to it .. i can see the ir led .. so the camera can pick them up ..
I need urgent help ! Thanks.
Ya i would try it but find the britest leds you can find and it's gonning to take a good donzen and i'd put them in some kind of reflector. sorry i'm sure you know all this....Bob
a link of some cheap and brite led's
http://sales.goldmine-elec.com/prodlist.asp?catid=2274
a link of some cheap and brite led's
http://sales.goldmine-elec.com/prodlist.asp?catid=2274
CMOS and CCD chips often have an IR filter in front of them to keep them from being overloaded with energy outside the visible spectrum. To check you camera for IR sensitivity see if it can show you the IR emitters working on a remote control. They should show up as white. If this works a god IR illuminator should give you good see in the dark capability.
If you cant see your remotes IR diodes pulsing, look for a thin glass or plastic filter between the lenses and sensor. If the camera uses a pinhole aperture it may be beneath the pinhole.
I re-read your post and see that you can see the remotes emission, good. If you can still find and remove an IR filter, this would increase the night sensitivity.
Edmund Scientific might still sell a non-LED IR light source.
-Dave
If you cant see your remotes IR diodes pulsing, look for a thin glass or plastic filter between the lenses and sensor. If the camera uses a pinhole aperture it may be beneath the pinhole.
I re-read your post and see that you can see the remotes emission, good. If you can still find and remove an IR filter, this would increase the night sensitivity.
Edmund Scientific might still sell a non-LED IR light source.
-Dave
OK
I don't know what to say ... Thank's for the help !!!!
I have found some good ir leds , they emitte 300 mW .. it's that enoth ?? They are some LD 242 . ( photo )
I can fit only one IR led that it's powerfull instad of many other not that powerfull ? How many mW should have to make my camera see in the dark ?? ( 1 led only )
Bye , Best wishes , Mihai .
I don't know what to say ... Thank's for the help !!!!
I have found some good ir leds , they emitte 300 mW .. it's that enoth ?? They are some LD 242 . ( photo )
I can fit only one IR led that it's powerfull instad of many other not that powerfull ? How many mW should have to make my camera see in the dark ?? ( 1 led only )
Bye , Best wishes , Mihai .
Attachments
The power output will depend on how far you need to illuminate.
Keep in mind that light intensity decreases as an inverse function of the distance squared.
More is likely better here. A small room wont take too much, an area the size of a football (soccer) field could take a whole lot more.
Keep in mind that light intensity decreases as an inverse function of the distance squared.
More is likely better here. A small room wont take too much, an area the size of a football (soccer) field could take a whole lot more.
OK
I need to light a little space , 2 meters by 3 meters , is the stairs room of a bloc .
How many of that leds do you think i need ?
Or how many led's of what intensity i need ?
Thank, Mihai
I need to light a little space , 2 meters by 3 meters , is the stairs room of a bloc .
How many of that leds do you think i need ?
Or how many led's of what intensity i need ?
Thank, Mihai
I can only guess...
I don’t know that I can directly answer your question.
You need to know the photometric values of the diodes you will be using and the sensitivity in the IR band of the CMOS sensor.
The photometrics of the diodes will tell you stuff like beam spread and LUX or FC values at various distances.
Having blathered on about what I can’t do for you, I notice that a lot of prepackaged security cameras have 4-12 diodes located around the camera lens. Try 6 and see what you get. If you need more detail or resolution add another handful of diodes.
Stand-alone IR panels look like than can have a few dozen diodes.
-Dave
I don’t know that I can directly answer your question.
You need to know the photometric values of the diodes you will be using and the sensitivity in the IR band of the CMOS sensor.
The photometrics of the diodes will tell you stuff like beam spread and LUX or FC values at various distances.
Having blathered on about what I can’t do for you, I notice that a lot of prepackaged security cameras have 4-12 diodes located around the camera lens. Try 6 and see what you get. If you need more detail or resolution add another handful of diodes.
Stand-alone IR panels look like than can have a few dozen diodes.
-Dave
Thank's
I will find a way to do this .. I buy yesterday 10 IR led , i think their low intesity because the price was very low .. about 10 cent's , they are normal , i go in the dark with them , the camera see the 10 diodes , but when i put them behind the lens nothing ... and if a put a A4 page in the front of the diodea i can see the A4 .. but nothing further ...
I think the led's are to damn low intensity ...
Thank's for the info !!
I will find a way to do this .. I buy yesterday 10 IR led , i think their low intesity because the price was very low .. about 10 cent's , they are normal , i go in the dark with them , the camera see the 10 diodes , but when i put them behind the lens nothing ... and if a put a A4 page in the front of the diodea i can see the A4 .. but nothing further ...
I think the led's are to damn low intensity ...
Thank's for the info !!
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