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DLPLCR4500EVM: The issue of using the plan

Tonyx.wu
Genius 4305 points
Part Number: DLPLCR4500EVM
Other Parts Discussed in Thread: DLPC910, DLPC900, DLP9000XUV

Recently, we have the following requirements. We wonder if the DLPLCR4500EVM product can meet them. If it can, please see if specific operation suggestions can be provided.


Requirement It is necessary to generate red light vertical interference fringes of a certain area size (such as 40mm×40mm). Red light refers to light with a wavelength of about 635nm. This interference fringe has a certain period, such as an interference fringe spacing of 0.2mm to 1mm. Subsequently, CMOS/CCD and other photodetectors will be used to detect this interference fringe. In summary, it is necessary to generate red light interference fringes within a certain period.

 


If it can't be met, please help take a look at how to handle this application? Please give detailed suggestions. Thank you!

  • 0
    TI__Genius 13360 points

    Hello Tony,

    Thank you for coming to E2E with your question!

    The LED within this EVM is the 'LTST-C191KRKT' and operates at 631nm and the Optical Engine information can be found in the EVM User's Guide within Table 1-1.

    Best,

    Aaron

  • 0 in reply to Aaron Black
    Genius 4305 points

    Thank you for your reply and answer. We would like to further ask whether the DLPLCR4500EVM product is suitable for achieving vertical red light stripes at a certain period interval, such as about 1mm.



    At present, we have learned internally that the TI products we have purchased include: DLP9000XUV, DLPC910 digital DMD controller, DLP LightCrafter DLPC910 evaluation module, and DLP LightCrafter dual DLPC900 evaluation module.



    I wonder if the TI products we have purchased can meet our requirements for achieving vertical red light stripes at certain intervals, such as about 1mm?



    If it's convenient for you, please reply in a timely manner. Thank you!

  • 0 in reply to Tonyx.wu
    TI__Genius 13360 points

    Hello Tony,

    I'm going to include a member of my team here to comment on this. They might need some time to get back to you. Please bear with us as they respond to you!

    Best,

    Aaron

  • 0 in reply to Aaron Black
    Genius 4305 points

    Please help handle it as soon as possible. Thank you!

  • 0 in reply to Tonyx.wu
    TI__Prodigy 10 points

    Hi Tony,

    May I ask what your application is?

    Yes, the DMD can be used to create vertical interference fringes at this wavelength. One way is to create a binary pattern. If it needs to be vertical, set all the mirrors in a given column to be the same. Then choose the pixel period to fit your exact fringe spacing needs. 

    For example, even columns could be set to on, while odd columns could be set off. Upon illumination, a fringe diffraction pattern will be generated. If the fringe period needs to be spaced further, you can adjust the number of on or off columns. I have not done this personally, but I believe with some experimentation, you should be able to get vertical fringes in the fourier domain. 

    Let me know if you have further questions!

    Regards,

    Zach