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M0040 ToF sensor FOV

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  • E Offline
    E Offline
    Eloi
    Contributor
    wrote on last edited by
    #1

    Dear ModalAI,

    At https://docs.modalai.com/M0040/ you have:
    FOV (H x W) 85.1° 106.5° (measured by experiemnt)

    At https://www.modalai.com/products/voxl-dk-tof you have:
    FOV (H x V) 117° x 117° (near field 100° x 80°)

    Which is the correct FOV?

    Also, which is the correct position of the sensor (as vertical and horizontal plane)?
    f60159ba-a3ac-437b-8db9-6c0aec20444a-image.png from this link https://docs.modalai.com/M0040/ or
    356449b6-a6f9-4892-b1cf-9b39c8774dfa-image.png from this link? https://www.modalai.com/products/voxl-dk-tof

    I want to create a 3D cone covering the "view" to be sure that it doesn't see anything else, but cannot due to different FOVs and that i don't know what is the horizontal plane of the sensor.
    By now I'll use the more restrictive FOV 117ºX117º...

    Thanks for your work!
    Eloi

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    • Chad SweetC Offline
      Chad SweetC Offline
      Chad Sweet
      ModalAI Team
      wrote on last edited by
      #2

      The statement: "FOV (H x V) 117° x 117° (near field 100° x 80°)" was provided by PMD, the technology company behind the sensor. Since the "near field" spec lines up with our measured spec, I think that is a good place to start

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      • E Offline
        E Offline
        Eloi
        Contributor
        wrote on last edited by
        #3

        Thanks,
        BTW, i've checked it with the help of a team mate and this is the correct FOV orientation for the sensor (not the measurements):
        e05f360a-d319-4564-a99d-b38286d36f7c-image.png

        Keep in mind that the Graphics Industry Standard is W x H and you have H x W = 85ºX106º and should be W x H = 85ºx106º (for this position in the picture)
        Also, W x H = 85ºx106º vs Horizontal x Vertical = 100ºX80º on the different images can cause confusion with the different orientations and values.

        I would suggest to use the same ratings on both pictures.

        This is the correct HxV position of the sensor:
        4a3d84ec-ea53-4d7c-bde8-9f30dd96a861-image.png

        Eloi

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