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DLP6500FYE: High Resolution 3D Scanner Accuracy

Victor AMARY
Prodigy 20 points
Part Number: DLP6500FYE
Other Parts Discussed in Thread: DLP4500

Good afternoon, I m Victor Amary, application engineer. 

I am currently looking for some 3D solution and your system caught my attention. I am very impressed by the outcome from your pattern acquisition system. Within the point cloud section, you are talking about "accurate reproduction" or "accurate measurements". Therefore, i am wondering :

  • What would be the accuracy of such system? there is not so much information about it ...
  • Is the accuracy mainly limited by the camera/lens pair ? My thought is that the resolution of the camera needs to be good enough to detect the smallest fringe isn't it ?
  • How do you calculate such accuracy ?

In my terms, accuracy refers to the -optical- resolution (this could have several meanings according to people and fields). In others terms, the ability of the system to distinguish the smallest detail possible -from one pixel to its neighbour.

I would be grateful to get some additional information on this.

Thanks in advance,

Victor AMARY

  • 0
    TI__Mastermind 30600 points

    Hi Victor,

    Thanks for your questions and welcome to the DLP Forums!

    To answer your questions:

    1. In our TI Designs for 3D scanning, we do not specifically give the accuracy or resolution numbers because the designs are intended to be references. We have had customers who use a similar system and can achieve mm or um feature resolution, but it depends on optics and the camera.

    2. You are absolutely correct - the resolution/accuracy of the system is determined largely by the optics of the projector and the camera chosen. That being said, the DMD (DLP4500, DLP6500, etc.) does determine what the smallest projectable feature is.

    3. We don't have a set methodology for calculating this accuracy because we don't characterize it in our systems. One approach to take would be to have some sort of "calibrated" measurement object, which would have its dimensions well known to high precision, scan it and compare the results.

    Your definition of accuracy is similar to one that we would use.

    I hope this helps clear up your questions, please let me know if you have anything further!
    -Paul

  • 0 in reply to Paul Goedeke
    Prodigy 20 points
    Hi Paul,

    Many thanks for your details.
    You have confirmed my thoughts with clarity and rapidity.

    It should be enough for now :)

    Victor