• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 30 subscribers
  • Views 152 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

DLP7000: Diffraction Efficiency

Suhyun Shin
Prodigy 60 points
Part Number: DLP7000

Tool/software:

Hi, I have a question about the diffraction efficiency of NIR regions.

I found that DLP7000 has approximately 13 um pixel  pitch which follows the image below of (https://www.ti.com/lit/an/dlpa083b/dlpa083b.pdf?ts=1750915575976&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FBENANO-3P-C2100 PDF of page 6)

Is there a diffraction efficiency for NIR regions for example 700nm to 1500nm as well? I want to check if it is over 0.5 efficiency because we also NIR regions as well.





Also, I will use this DMD for hyperspectral imaging, so I am afraid if diffracted light is this much bad for  13 um pixel pitch.

Is there a picture of this for 13 um pixel pitch for visible and also NIR region(700nm - 1500nm)?

 



Thank you!

  • +1
    TI__Intellectual 1800 points

    Hello Suhyun Shin, 

    The DLPA083 document that you have linked above only discusses DMD Diffraction Efficiency under the visible Wavelengths, but does not cover diffraction efficiency in the NIR region. I would highly recommend looking at the DMD Diffraction Efficiency Calculator tool that is on TI.com, which was created by the DLP Optics team. This calculator tool can be used to help understand how to model DMD diffraction patterns and efficiency with specific DMD input parameters and is modeled to your specific design, but most importantly the calculator tool helps model DMD diffraction patterns and diffraction efficiency!

    When you download the calculator tool, there will be a user's guide embedded in the downloaded folder which will help you setup the tool and will explain how to use it for analysis. When you have this downloaded, you will be able to put your parameters in (DMD, pixel pitch, tilt angle, desired wavelength, etc.) and the calculator tool will provide you with a diffraction efficiency graph and what the projection aperture would look like (it would provide you with the image you are looking for). 

    The DMD Diffraction Efficiency Calculator tool can be downloaded here:  https://www.ti.com/tool/download/DMD-DIFFRACTION-EFFICIENCY-CALCULATOR 

    Best Regards, 

    Tristan Bottone