EEVblog Electronics Community Forum
Products => Thermal Imaging => Topic started by: Robert763 on December 22, 2020, 07:25:37 pm
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I'm new to this bit of EEVblog, but not TI or EEVblog generally.
I recently picked up a AGA Thermovision 110 imager. as yu may know this used a peltier cooled line array (vertical) scanned by a mirror (horizontal) with a 1" round CRT. It's basically a civillian version of the American military AN/PAS-7. Unfortunatly a few of the sensor elements at the bottom of the array are not working. It's still suprising the performance of this old unit provides and it still has more vertical pixels than some of the cheap "imaging" thermometers that still cost more.
This has re-kindled an interest in TI. I started about 25 years ago with a LN2 cooled Thermovision 782. That needed repair, stuck frame scanner. Nice dispite the need for LN2. It went to a educational exhibit. Ive had a couple of pyroelectric vidicon cameras too but was not impressed an they were passed on. one was shutterless so you had to keep it moving ???
Anoter 782 followed about 10 years later but I was made a silly offor for it by somone who wanted the lenses. Also used some rented FLIR higher end stirling cooled cameras for work about 15 years ago and (cant remeber models) also airborne sensors but can't talk about those 8)
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Hi and welcome to this corner of the EEVBlog forum :-+
The thread I started on the AGEMA 510 may be of interest as that scanning camera uses a similar design to the 110.
https://www.eevblog.com/forum/thermal-imaging/agema-thermovision-510-a-look-under-her-clothes-by-fraser/msg1143025/#msg1143025 (https://www.eevblog.com/forum/thermal-imaging/agema-thermovision-510-a-look-under-her-clothes-by-fraser/msg1143025/#msg1143025)
The service manual for the AGEMA/Magnavox 210 is available on the FLIR support portal and that includes circuit diagrams. The 210 is also similar to the 110 in many respects. It is located under Legacy Products\AGA & Agema (legacy)\Technical Documentation. It is 117MB in size.
https://flir.custhelp.com/app/account/fl_download_manuals (https://flir.custhelp.com/app/account/fl_download_manuals)
With regard to imaging performance, I have been impressed with the image produced by the AGEMA 510. She is a very nice, relatively compact, scanning thermal camera. From what i can tell, the 510 was the last camera of the format produced.
Fraser
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The AGEMA/MAGNAVOX 210 service manual makes interesting reading and the schematics help to explain the design nicely :-+
I will add some screen captures from the service manual to this post.
Fraser
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Hi Fraser,
Thanks for the info.
There seem to have been variations of the 110, I've seen mention of video output but not seen a connector on picture of imagers. There is certainly variation on the power connector location and power switch type. Mine is very similar to the AN/PAS-7
My 110 has 60 pixel array giving 60 pixels vertically and bandwidth limited horzontal. It seems the mirror is not well enough balanced to allow greater vertical view. The picture breaks up if you turn it through 90 degrees. Nothing digital in my unit, it's parallel analog. Neat stack of little plug in boards with TL074 quad op-amps and a 1" round CRT. One of the lower pixels has come back on so maybe bad connection. When I open it up to have a look I'll take some photos.
One thing I checked is the window. The AN/PAS-7 manual has a warning about a radioactive coating (Thorium). My 110 window is not radioactive. One of my hobbies is radiation detection so I have equipment sensitive to detect even a thin coating (Pancake GM tube)