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  1. cluelessone

    Follow-up to the IR thread

    Follow-up: I just completed testing with the Evonik Acrylite FF sample in a IR temperature sensing application. The test was performed with the Black 9K020 GT (was 1146-0 IRT) material, 2.9 mm thickness. The transmission was in the few percent range which means that material is unusable for...
  2. cluelessone

    Follow-up to the IR thread

    The problem is that this "find the polymer you are interested in" is my original question: "Any suggestions on what I should be looking for?" When I said "this raises almost as many questions as it answers" it is because it describes a few properties in: "thin sheets of polyolefin plastics, and...
  3. cluelessone

    Follow-up to the IR thread

    After considerable surfing I found a few interesting links: http://www.kube.ch/optics/index.php http://www.acrylite.net/sites/dc/Downloadcenter/Evonik/Product/ACRYLITE/3648%20IRT%20Tech%20Bulletin%20GP%20FF.pdf http://www.fresneltech.com/materials.html http://www.infraotica.com/ And this...
  4. cluelessone

    Follow-up to the IR thread

    The sensor is looking out up the housing, with a 7 degree beam angle so it can be thought of as imaging. The poly bag I have been working with seems to be working well; the sensing area does not seem to be markedly changed and the drop in output is manageable and can be calibrated out. It is...
  5. cluelessone

    Follow-up to the IR thread

    In this application the sensor bar will be mounted on a vehicle with road dust and dirt hitting the sensor at highway speeds. Saran wrap my not be enough to keep gravel from getting into the sensor package. This particular build is a prototype so I can use a poly parts bag as it is pretty...
  6. cluelessone

    Follow-up to the IR thread

    Hmm, excellent point. I am thinking in terms of a part that once die cut would keep a flat shape while the assembler positions it over the machine and presses it in place using a PSA film. I would consider a overhead write-on sheet as rigid. I would consider poly-sheeting used to enclose a...
  7. cluelessone

    Follow-up to the IR thread

    Thanks for the link to Topas. The transmission chart only goes to 800 um and does not tell me anything about 800 to 1500 um range, with the 800 um to 1200 um being the areas of highest interest. It is worrisome that the copy that goes with the chart mention near IR by name. I don't really know...
  8. cluelessone

    Follow-up to the IR thread

    I am trying to do temperature measurement through a sheet plastic window. I have the electronics portion working well in my lab but all the "IR" windows I put in front of it pass so little energy that the unit is useless. ("windows glass" and clear polycarb) The supplier of the sensor says that...

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