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DLPDLCR2000EVM: Ultra short throw optics

Michael Meier
Prodigy 10 points
Part Number: DLPDLCR2000EVM

I am trying to make the DLPDLCR2000EVM into an ultra short throw projector. I have never designed optics, I don't know a whole lot about them and I don't have access to paid optics creating software. Honestly I really don't know where to go with my project. I have tried using a cheap plano-convex lens with a concave mirror to try and increase the size of the screen over a small distance but it didn't work out well. If I could be pointed in the right direction, it would be very helpful.

 

  • 0
    TI__Genius 11555 points

    Hi Michael,

    Welcome to the TI E2E forums and thanks for showing interest in the DLP technology.

    I have few questions of your project. What's the purpose of your design if you can share? What's the display resolution you are interested? 

    Thank you!

    Regards,

    Lori

  • 0 in reply to Lori Wang
    Prodigy 10 points

    I am trying to project fire. I am unsure what resolution we will need at the moment. I will be using this in series, for a total of three projectors and three panes to provide depth, so the throw distance needs to be as short as I can make it. 

  • 0 in reply to Michael Meier
    TI__Mastermind 20575 points

    Hi Michael,

    So, In general we are not going to be able to help you to design optics. Our optics team is still in its infancy, and we use 3rd parties for our optical engines exclusively

    What you should do is look up our optical module search tool https://www.ti.com/tool/DLP-OMM-SEARCH This is an excel sheet with all the optical modules we have available for our DMDs, you can sort by throw ratio. I glanced at it and saw many with throw ratio below 0.4. some of these companies may also sell small quantities, however many don't,

    Also, you should consider a feature that we have called "keystone correction". the purpose of this is to be able to project a square image on a surface that is not orthogonal to the projection lens ( such as projecting fire down onto a transparent screen). depending on how 'steep' the angle is that you are projecting you may be able to get away with using this feature with the default EVM optical engine.

    Regards,

    Arthur

  • 0 in reply to Arthur Brown
    Prodigy 10 points

    Thank you, though my issue is that I need the image to be a whole lot bigger than it currently is. I will be using keystone correction as well as the lens setup. Is there a 3rd party company that you would recommend for this design process?

  • +1 in reply to Michael Meier
    TI__Mastermind 20575 points

    You may want to contact opteks https://www.optecks.com/Portal/ 

    They are US based and make optical modules for DLP DMDs, and from their website it seems like they may be able to lend some knowledge.

    in your case you may either need to retry a plano-convex lens after doing more homework on optics, or try and quantify exactly the throw ratio you need and finding a optical module that can meet that requirement.

    Regards,

    Arthur