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DLP 4500 / 4500NIR mirror reflectence

user4079080
Prodigy 210 points
Other Parts Discussed in Thread: DLP4500NIR, DLP4500, DLPC350

Hi, 

I would like to know the reflectance v.s. wavelength relation of the  micromirror arrays of DLP 4500 and DLP 4500NIR.

Thanks.

Sincerely,

Allen

  • 0
    TI__Mastermind 30600 points
    Hi Allen,

    In the datasheet for the DLP4500, Table 6.10 indicates that the mirror metal specular reflectivity is 89% between 420nm and 700nm. For the DLP4500NIR, the reflectivity is also 89% but the wavelengths are 700nm to 2500nm.

    I would also take a look at this app note to see if it has any further information that might be useful to your application: www.ti.com/.../dlpa031

    Thanks,
    Paul
  • 0 in reply to Paul Goedeke
    Prodigy 210 points
    Thanks Paul,

    By the way, is there a document instructing me how to change the DLP4500 on the Evaluation board to DLP 4500 NIR ?

    Great thanks,
    Allen
  • 0 in reply to user4079080
    TI__Mastermind 30600 points
    Allen,

    I'm afraid not. The DLP4500NIR is a physically different device and mounting the DMDs isn't trivial. The DMD in the Lightcrafter 4500 is also inside an included optics engine which is optimized for the visible spectrum.

    Thanks,
    Paul
  • 0 in reply to Paul Goedeke
    Prodigy 210 points
    Hi Paul,

    This really confuses me. If we can't mount the DMD4500NIR onto Lightcrafter 4500, how can I control the DMD4500NIR?

    Thanks

    Sincerely,
    Allen
  • 0 in reply to user4079080
    TI__Mastermind 30600 points
    Allen,

    I'm not sure that I'm understanding. Is there some documentation that you're reading that indicates that the DLP4500NIR is controlled by the Lightcrafter 4500? Or can be used in the Lightcrafter 4500?

    The evaluation model that we have for the DLP4500NIR is the NIRscan: www.ti.com/.../dlpnirscanevm

    What is your end application?

    Thanks,
    Paul
  • 0 in reply to user4079080
    Intellectual 345 points

    Allen,

    It is possible to replace the DMD used in the Lightcrafter4500 with a NIR version. However, the optical components are not coated to really take advantage of it. We do something similar in our LC4500 and offer either the standard visible window version of the DLP4500 or the NIR version. It is the same connector on the DMD package - you just need to be careful on avoiding fingerprints and take precautions on ESD. 

  • 0 in reply to Paul Goedeke
    Prodigy 210 points

    Hi Paul,

    We are planning on using the DMD4500 NIR to shape laser beams (with 1064 nm wavelength), more specifically, we planned to generate a ring beam by making the DMDs form a doughnut pattern and shine laser onto it. I guess that we will eventually remove the LEDs and replace them with our laser beam. The mirrors and lens inside will be removed for convince, leaving only the DMD and the control board.

    If my memory serves me correctly, my colleague in the lab and I have both read a official document on DLP4500 that says by replacing the DMD4500 on DLP4500EVM with DMD4500NIR, we can then shine 1064nm wavelength on it with better efficiency and gain control of the DMD4500NIR in the same way. 

    Can DLP® NIRscan Evaluation Module help us achieve our goal?

    Thanks,
    Allen

  • 0 in reply to user4079080
    TI__Mastermind 30600 points
    Allen,

    I don't think that the NIRscan would be a good fit for your application.

    The swap you're asking for is possible - the chipset can control the DMD just find. TI just doesn't provide documentation on how to swap the devices - I'm sorry.

    Adam from Keynote (above) would be a good resource for you to accomplish what you're looking to do. Take a look at this thread which Adam also commented on:

    e2e.ti.com/.../1791647

    Hope this helps!
    Paul
  • 0 in reply to Adam Kunzman45
    Prodigy 210 points

    Hi Adam,

    Can you give me a quick introduction on your company's product and how it works with TI's DMDs and DLPs? I am now really confused by all the versions and products on the internet. Besides, can you tell me how it works to swap the DMD4500 with DMD4500NIR on Libghtcrafter 4500?

    Great Thanks,
    Allen

  • 0 in reply to user4079080
    Intellectual 345 points

    Allen,

    I'll give you the short answer, feel free to call us or contact us directly if you have further questions.

    * For general pattern control, you can use the electronics from the LightCrafter 4500 module and replace the DMD with the DLP4500NIR. The limitation of the Libghtcrafter electronics is that their is a rather short flex-cable (1-2 ") between the DMD and the main control board, making it a bit of challenge to mount on any bench optics.

    * We specifically designed our own LC4500 controller board, that is compatible with the TI API and GUI, that has a cable interface to the DMD holder board. It comes with either the standard or NIR DMD. It also has a optional expansion board that allows you to quickly download an BMP file for patterns (instead of flashing a new image file). 

    * The NIRscan is specifically designed for spectroscopy. While it uses the DLP4500NIR, the electronics don't seem well suited for your project.

    I hope that helps clarify things. It can be a bit confusion between all of the solutions that TI offers and what the various Design Network partners offer.

     

  • 0 in reply to Adam Kunzman45
    Prodigy 210 points
    Hi Adam,

    Thanks for the information. How can we contact you directly?

    Thanks,
    Allens
  • 0 in reply to user4079080
    Intellectual 345 points

    Allens,

    Sorry for my delayed replay. Best way is to submit a contact form at http://www.keynotephotonics.com/contact-us/ and someone will follow-up with you further by e-mail or phone.

  • 0 in reply to Adam Kunzman45
    Prodigy 45 points
    Excuse me, I want to know if I buy DLP4500NIR from the agent in China, do I also need to buy LC4500 control board, or the LC4500 is provided with DLP4500NIR? And is there any SDK for LC4500 or the TI API and GUI will do? How can I operate the DLP4500NIR by the computer? Thank you so much.
  • 0 in reply to Yong Wang48
    Intellectual 345 points

    Hi Yong,

    Yes, we can configure a kit that includes the drive board, the DLP4500NIRFQE, and cable. The same TI API will work directly with this kit to communicate to the DLPC350. We provide an updated GUI tool that supports the particular flash memory installed, as well as control some other functions. It looks and operates very like the TI version.

  • 0 in reply to Adam Kunzman45
    Prodigy 45 points
    Sorry to disturb you again, just because my supervisor wants to make sure some details.
    1. Which should I choose between the DLP4500NIRFQD and DLP4500NIRFQE?
    2. Do I get the drive board and the TIAPI to operate the DMD4500NIR for free or I need to pay extra money？
    Thank you so much for answering these trivial questions.
  • 0 in reply to Yong Wang48
    Intellectual 345 points

    Dear Yong,

    These are good questions.

    1) The DLP4500NIRFQE less expensive due to the package design. I'm not sure your application, but unless you plan to create high-power IR design, I would recommend using this. Also, the mechanical interface to use the FQD package is more difficult and may require some custom mechanical design to ensure the DMD is attached to your optical system.

    2) The software is available at no extra charge. We can provide a quote for the drive board and DMD. Please go to our contact form at keynotephotonics.com/contact-us and we can send it to you directly. We can also send you user's guide.

    You can also find the entire kit on our e-store at LC4500-NIR-EKT

  • 0 in reply to Adam Kunzman45
    Prodigy 45 points

    Oh I understand, so you mean I can get DMD from the agent of TI but I can't get the drive board from TI, but how can I get the drive board from the agent because I am in China? Thank you. Expect your reply.

  • 0 in reply to Yong Wang48
    Intellectual 345 points
    Yong - I will send you a private message on a possible approach. Thanks.
  • 0 in reply to Adam Kunzman45
    Prodigy 45 points
    I have sent you a private message. Can you reply me because I'm in urgent need of DLP4500NIR? Thank you so much for bothering.