Jennek Geels

we want to capture a scene that is lit by IR LEDs either 880 nm or 

- replace it by a day light blocking filter

but we have found that the sensitivity of the CCD at 880 nm is only 

of the sensitivity at visible wavelengths. This calls for a huge 

Are there any monochrome cameras with a spectral sensitivity that 

IR LED lighting at 880 nm or 950 nm more closely?

- digital interface (firewire USB2 ethernet)

we are looking for an IR camera.
we want to capture a scene that is lit by IR LEDs either 880 nm or  
950 nm.

we have experimented with a webcam:
- remove the built in IR blocking filter
- replace it by a day light blocking filter
but we have found that the sensitivity of the CCD at 880 nm is only  
10-15%
of the sensitivity at visible wavelengths. This calls for a huge  
amount of LEDs.

Are there any monochrome cameras with a spectral sensitivity that  
matches
IR LED lighting at 880 nm or 950 nm more closely?

other criteria
- resolution minimal VGA
- framerate 30 fps
- digital interface (firewire USB2 ethernet)

Any pointers appreciated
aTdHvAaNnKcSe
-jennek


looking-for-an-ir-camera

You may want to try lighting the scene with a tungsten light with many 

layers of deep red gel (other colors would probably work too) on it. 

The IR light gets through fine and casts a nice red glow. I've done it 

and it works great. I've used Q-see cameras, they're cheap and work 

You may want to try lighting the scene with a tungsten light with many 
layers of deep red gel (other colors would probably work too) on it.  
The IR light gets through fine and casts a nice red glow.  I've done it 
and it works great.  I've used Q-see cameras, they're cheap and work 
fine for my needs.

I am looking for some help getting multiple audio streams into 

MaxMSP/jitter via VoIP, or via Modem, so two or three people can call 

into Jitter and make things happen there with their voices. Ideally, 

Jitter would also be able to call people from a list of numbers. This 

VOip only runs one conversation at a time, and conference calls mix all 

Modems are not recognized as audio devices

I am looking for some help getting multiple audio streams into 
MaxMSP/jitter via VoIP, or via Modem, so two or three people can call 
into Jitter and make things happen there with their voices. Ideally, 
Jitter would also be able to call people from a list of numbers. This 
is for a Mac OSX G5 system.

problems so far:
VOip only runs one conversation at a time, and conference calls mix all 
voices into the same channels
Modems are not recognized as audio devices

Golan Levin et al. used IR illumination and tracking for "Messa di 

Voce". The website has a very informative technical requirements 

These pages list equipment used and include diagrams, IR setup, IR 

http://www.tmema.org/messa/installation.html

http://www.tmema.org/messa/technical.html

If you are not familiar with this work, you should take a look 

Golan Levin et al. used IR illumination and tracking for "Messa di  
Voce".  The website has a very informative technical requirements  
list for performance or installation.

These pages list equipment used and include diagrams, IR setup, IR  
filters, sources, etc.

http://www.tmema.org/messa/installation.html
http://www.tmema.org/messa/technical.html

If you are not familiar with this work, you should take a look  
anyway.  It is quite lovely.

this is really helpful. It pointed me to a kind of

surveillance camera from Sony, and on the sony site I found

a product line based on a Sony CCD that has increased near IR 

Many thanks, Christopher,
this is really helpful. It pointed me to a kind of
surveillance camera from Sony, and on the sony site I found
a product line based on a Sony CCD that has increased near IR  
sensitivity.

And you are right, it is a lovely piece.
-jennek


Can you pass along which camera model you found? I'm also very 

Can you pass along which camera model you found?  I'm also very 
interested.

I believe it's the Sony HAD ex-view chip. It works very well for IR. 

You'll need a DV converter to bring it into the computer though.

I believe it's the Sony HAD ex-view chip.  It works very well for IR. 
You'll need a DV converter to bring it into the computer though.

http://www.supercircuits.com/index.asp?PageAction=VIEWPROD&a

http://www.supercircuits.com/index.asp?PageAction=VIEWPROD&a mp;P rodID=4167

Indeed, the sony Chip to look for is the Exview or Exwave HAD CCD.

I am still researching the cameras that use this chip,

Supercircuits does not seem to ship outside the US ?

I have also found that Sanyo has a CCD with increased IR sensitivity.

I'll report back if and when I found something useful.

Indeed, the sony Chip to look for is the Exview or Exwave HAD CCD.
I am still researching the cameras that use this chip,
and which one fits my requirements best.
Supercircuits does not seem to ship outside the US ?

I have also found that Sanyo has a CCD with increased IR sensitivity.
I'll report back if and when I found something useful.
-jennek


Does anyone have any more reports on using these cameras? 

I'm looking for a suitable camera to track body movement thermally..

Does anyone have any more reports on using these cameras? 
I'm looking for a suitable camera to track body movement thermally..


the cameras this thread discuss are in the *near* infra red range, thermal

imaging operate at much higher range, which needs special sensors which are

liquid cooled, usually starting at 15,000$

http://en.wikipedia.org/wiki/Thermal_imaging

On Sun, May 18, 2008 at 6:43 PM, John Callaghan wrote:

> Does anyone have any more reports on using these cameras?

> I'm looking for a suitable camera to track body movement thermally..

the cameras this thread discuss are in the *near* infra red range, thermal
imaging operate at much higher range, which needs special sensors which are
liquid cooled, usually starting at 15,000$
http://en.wikipedia.org/wiki/Thermal_imaging

On Sun, May 18, 2008 at 6:43 PM, John Callaghan  wrote:

>
> Hi,
>
> Does anyone have any more reports on using these cameras?
> I'm looking for a suitable camera to track body movement thermally..
>

Looking for an IR camera