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Thread: SHOT Show 2015 Pictures (From SMGLee)

  1. #1441
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    It's a PWS keymod handstop that was announced at SHOT. PWS is going to be releasing a revised version in the very near future.

    Here is a better image of it. Cool thing about it is that it can be reversed as well; great if you're running this on a SBR and want to make sure your hand doesn't go too close to the muzzle.

    Last edited by RXM; 02-18-14 at 08:30.

  2. #1442
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    I used to operate FLIR turrets made by Raytheon when I was a S-3 Viking Senso. How do they get the units cool? I have been trying to make contact with someone at FLIR to get additional information. Who do I get a hold of. This thread is great but I have additional questions.


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  3. #1443
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    These are noncooled vanadium oxide cores, they have a manual numerical uniform correction alogrithim for the microbolometer thermoresistor sensors to keep them all balanced at the same temperature coefficient differential during the use when the instrument is on.

    You can contact FLIR Government Systems here:

    http://gs.flir.com/

  4. #1444
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    Skypup. IM sent.


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  5. #1445
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    I'm still not understanding, there's a piece of the puzzle I'm missing so I hope you don't mind if I just lay down my assumptions and understanding and maybe you can fill in the gap(s) that I'm missing?

    The thermal optic uses a microbolometer to convert infrared light to electrical signals. Those electrical signals are then compared to one another and essentially given a numerical value that can be interpreted in various ways (black hot, white hot, etc). This interpretation of the electrical signal is output in a LCD/OLED screen at a set resolution depending on make and model, but up to about 640x480 at the highest end.

    When you actually "use" a thermal optic, in simplified terms, you're looking through the LCD screen of a digital camera that sees infrared instead of visible light.

    Digital zoom is done at a step after the image is converted but before it's output to the screen - it takes a smaller portion of the image in the middle and has it take up more pixels on the screen... the screen is still outputting at 640x480 (for example), but it might be 4 pixels represent 1 pixel of actual image data. The same thing happens when you enlarge a .jpg image on your computer. There isn't more image data to see when you enlarge it (for example, if it didn't exist in the image data due to resolution/optical/etc issues before you digitally enlarged it, it won't be in the image after you enlarge it), but it can make smaller things easier to see.

    In this case, using a magnifying glass over a digital screen makes the physical pixels appear bigger whereas using digital zoom makes the virtual pixels bigger on the same physical pixels.

    So maybe I'm not understanding because the screen is so tiny that making the physical pixels seem bigger by even 4 times still isn't allowing you to see the individual pixels? And the FOV of an optic could much bigger than the screen, thus giving you less loss of peripheral image data when magnifying?

    I don't understand how it could be clearer though since again, you're not gaining any image data and are infact putting another barrier (albeit a very clear one) between your eye and the image.

    ETA: Maybe FLIR System's software for digital zoom isn't that great? That could be one reason that explains the difference.
    Last edited by Koshinn; 02-18-14 at 09:34.
    "I never learned from a man who agreed with me." Robert A. Heinlein

  6. #1446
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    FLIR has plenty of hardcore electrical engineering peer reviewed publications in the literature to address the complex questions that you are seeking answers for which cover the entire gamit of electrons, light waves, pixels, germanium lenses, glass lenses, optics, human retinas, and much much more. It is simply impossible to cover all these critical subjects in an internet forum.

    Here are some simple ones you can read for the general public to help your understanding out somemore:

    http://www.flir.com/uploadedfiles/eng_01_howfar.pdf


    http://www.flir.com/uploadedFiles/Th...20325_APAC.pdf

    http://www.flirmedia.com/MMC/THG/Bro...T820147_EN.pdf

  7. #1447
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    Cool, thanks!
    MudPhud

  8. #1448
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    Koshinn, Contrary to your assumptions, FLIR's software for digital zoom is absolutely great and better than any other anywhere in the world, apparently you do not know much of what you have been talking about here?

    Many people are unaware of FLIR's software alogrithim that enhances their thermal sight images.

    Here is an explanation of why DDE is important at times:


    Only under extreme unfavorable environmental conditions do I even use FLIR's proprietary DDE (Digital Detail Enhancement) to bring out the background contrast above a linear thermal gradient. DDE is basically a spatial filter designed to enhance the high spatial frequencies (edges etc.). The DDE filter attenuates high amplitude signals, making more of the total dynamic range available to display faint objects and details. The amount of attenuation is automatically determined by analyzing scene statistics.

    Here is a link to FLIR's excellent Digital Detail Enhancement proprietary alogrithium:

    http://www.flir.com/uploadedfiles/Eu...TN_0003_EN.pdf


    Digital Detail Enhancement (DDE) helps the human eye to see targets more easily using thermal imaging.

    Human eyesight can only distinguish about 128 levels of grey in an image (7 bit signal).

    A Long Wave Infra Red microbolometer core is assimilating in excess of 15,000 levels of grey (14 bit signal) and has to transform this into a 7 bit signal which the human eye can distinguish - otherwise a target will go undetected.

    FLIR Systems developed Digital Detail Enhancement (DDE) to help make targets more readily visible.

    DDE magnifies all details equally - so a small hot spot against a cold background will be just as clear to see and not be lost amid the dominant background temperatures.

    This overcomes a major problem and is extremely important in acute circumstances.

    It is an exclusive FLIR Systems product and is incorporated into all its thermal imaging.

    If you cannot understand that, watch the video of it in action:

    http://www.youtube.com/watch?v=QfY3AOKF5gA
    Last edited by SkyPup; 02-19-14 at 08:51.

  9. #1449
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    BTW, FLIR DDE comes STANDARD in all their RS Thermal Weapon Scopes, none one else has it but FLIR, the software to operate the microbolometers is proprietary and not sold to other aftermarket manufactures, that is the HUGE difference between FLIR and other garage shop manufactures that purchase their focal array cores and germanium lenes and try to come up with some software to run it so that your retina sees something in the OLED......haha LOL.

  10. #1450
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    We will be testing all these newly released FLIR RS Thermal weapon units out in the field on some hogs and coyotes this weekend at my ranch with FLIR representatives:

    RS-32 1.25-5 320X240 19mm

    RS-32 2.25-9 320X240 35mm

    RS-32 4-16 320X340 60mm

    RS-64 1.1-9 640X480 35mm

    RS-64 2-16 640X480 60mm

    Video and pics and reviews to follow....

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