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Optical Path Information

Tom Myers2
Intellectual 475 points

Hi,


I have attached the optical layout from the user guide.

I wish to change the wavelength range with which the NIR scan operate over (while remaining within the DMD allowable range). I also have the BOM for the module, however, it would be useful to know the what lens and filters are positioned where so that they may be substituted/changed by individual developers wishing to adapt this to their requirements.

Maybe the lens are not coated for a certain wavelength and therefore are not required to be changed.

On the collimating lens block after the lens itself there is a rectangle component at a slight vertical angle, what is this?

Thanks,

Tom

  • 0
    TI__Mastermind 48280 points

    Tom,

    This is likely a confusion between what is available on the EVM page vs the TI Designs page.  On the TI Designs page, a full mechanical model and a Zemax optical module are available:  

    http://www.ti.com/tool/TIDA-00155  --> then click on "Design Files" to download.  The files will include:

    1. NIRscan - SolidWorks database 4-01-2014.zip
    2. NIRscan_optics_zemax.zip

    I hope this helps.

    Fizix

  • 0 in reply to Fizix
    Intellectual 475 points

    Hi Fizix,


    Thank you. Just to clarify if I look at these files/models I will find the information about the optical parameters for each optical element? So that I could replicate and or find equivalents for my design.


    Thanks,

    Tom

  • 0 in reply to Tom Myers2
    TI__Mastermind 48280 points

    Tom,

    You will need programs that can read the file types. 

    There may be more than one program that can interpret SolidWorks files that have free viewers, but I have not verified this. 

    However, I suspect that only Zemax can read the optical model file.  I do not know if Zemax has a free viewer.  I cannot find one if they do.

    Fizx.

  • 0 in reply to Fizix
    Intellectual 475 points

    Hi,


    I have solidworks but I cannot see how this will help understand the optical parameters.

    I have a demo version of Zemax, but again can I select each lens and determine its coating, wavelength specification, cut-offs ....?
     These parameters are the main specifications I require.


    Thanks,

    Tom

  • 0 in reply to Tom Myers2
    TI__Mastermind 48280 points

    Tom,

    From your original post, I thought you were primarily wanting the position of the elements - ". . .  it would be useful to know the what lens and filters are positioned where . . ."

    A number of the elements are custom parts for this design.  You can get the information from the zemax model, but if you are trying build for a different wavelength region, it will require a complete optical re-design.  It is not a simple undertaking.

    What are you specifically trying to accomplish? 

    You may want to contact our Design Partner who designed the unit for TI --> Keynote Photonics to see if you can piggyback off of some what they are working on.

    I hope this helps you.

    Fizix

  • 0 in reply to Fizix
    Intellectual 475 points

    Fizix,


    The Zemax model does not provide sufficient detail regarding the coatings and/or wavelengths parameters for each lens/filter.

    Trying to accomplish excitation by 785nm and measure over 200cm-1 to 4500cm-1 which falls within the spectral range of the DMD.


    I am going to consult with a local design company.


    Thanks,

    Tom

  • 0 in reply to Fizix
    Prodigy 15 points
    Fizix,

    I have downloaded the zip files for this design but there appear to be quite a number of missing CAD and Zemax files. The missing Zemax files are in the STEP format used for SolidWorks. Various SolidWorks parts are also missing from the top-level design and zip file.

    Is there some way I can provide a list of missing data and get this design updated? I have access to both SolidWorks and Zemax and can help resolve the issues.

    Thanks,

    Dave T
  • 0 in reply to Dave Taliaferro
    TI__Mastermind 48280 points

    Dave,

    First, welcome to the DLP Advanced Light Control section of the TI-E2E Community.

    We would indeed like to get your feedback on what files that you have identified as missing from the TI-Design.  It is important to get the files that are useful to customers into the Design.

    I will send you a Friend Invitation so that we can communicate directly regarding this.  Please accept the invitation so we can get your feedback.

    Fizix