• State TI Thinks Resolved
  • Locked Locked
  • Replies 6 replies
  • Answers 2 answers
  • Subscribers 29 subscribers
  • Views 262 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP6500FYE: Optical system using TIR prisms

yoshitaka
Prodigy 60 points
Part Number: DLP6500FYE
Other Parts Discussed in Thread: DLP7000

I intend to use a TIR prism
I would like to use a DLP6500 or DLP7000, but they must be illuminated from a position perpendicular to the micromirror hinge axis, i.e. 45°, and at an angle of incidence of 24° to the mirror normal.
Can a TIR prism achieve the incidence from perpendicular to the hinge axis of the mirror array?

Thank you in advance for your help.

  • 0
    TI__Mastermind 45485 points

    Yoshita-san,

    Let me consult with the Optics team on this question.  Please allow a day or two as this week is the Thanksgiving holiday week in the US.

    Fizix

  • 0 in reply to Fizix
    TI__Mastermind 45485 points

    Hello again Yoshita-san,

    Just for clarification, you are asking if you can illuminate the mirrors from the DMD normal, with the output being at 24 degrees from the normal (in other words the reverse of typical illumination.  Is that correct?

    Fizix

  • 0 in reply to Fizix
    Prodigy 60 points

    It is not.
    We want the final outgoing light to be perpendicular to the DMD mirror as in normal illumination.
    There are two conditions for this, right?
    1. perpendicular to the hinge axis, which in the case of DLP7000 is the direction of the incision
    There should be two conditions: 2. an angle of 24° from the normal of the mirror surface.

    I believe that the 24° angle from the normal of the mirror surface can be easily achieved by using a TIR lens, but I am not sure if the condition related to the hinge axis can be achieved.

    Sorry for the confusing explanation.
    Thank you in advance.

  • 0 in reply to yoshitaka
    TI__Mastermind 45485 points

    Yoshitaka-san,

    TIR (and RTIR) can be used for DMD design for these DMDs.  Once a TIR prism that allows for 24°  input from the normal is placed, it can be rotated around the DMD array normal until the input is at 45° azimuth (i.e. perpendicular to the hinge axis

    Does this make sense.

    See if this Optics Application Note helps:  https://www.ti.com/lit/an/dlpa022/dlpa022.pd 

    Fizix

  • 0 in reply to Fizix
    Prodigy 60 points

    If the input can be rotated around the normal of the DMD array until it is at a 45° azimuth (i.e. perpendicular to the hinge axis), does that mean that the DMD or TIR prism can be rotated and adjusted?

    Thank you in advance.

  • 0 in reply to yoshitaka
    TI__Mastermind 45485 points

    Yoshitaka-san,

    Sorry for the long delay,  I was out of pocket for the Thanksgiving holidays and weekend here.

    I am assuming that you are designing your own mounts and optical system. 

    Think of the one surface as parallel to the windows.  it can be rotated around the normal of that plane in your design.

    If you want something pre-made you should look at our optical module makers:

    https://www.ti.com/tool/DLP-OMM-SEARCH

    Fizix