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DLP9500UV: Using DLP9500UV for a slightly lower wavelength than specified?

Part Number: DLP9500UV

Hello,

We are planning on applying the DLP9500UV into a laser system (COMPEX300 - manual attached) to project larger scaled images. However, the wavelength of the current laser system is 351 nm, which is slightly lower than the specified wavelength range of the DLP9500UV (363nm to 420nm). Is it possible to use it with this laser anyways? 

Also, what is the power threshold of the DLP9500UV? As in we would like to know the maximum allowable power that would not cause damage to the micromirrors in the chipset?

Thank you

HN

  • Hello Hoa,

    Welcome to the DLP section of the TI-E2E community.  

    Operation below the 363 nm specification voids the warranty on the DMD.  Please see the following Application Report:  

    System Design Considerations Using TI DLP Technology in UVA (363 to 420 nm)

    It is possible to use lasers with a DMD.  Continuous laser is fairly straightforward.  Pulsed laser has quite a few variables (Pulse width, repetition rate, peak energy/power) and any system should be tested with the expected operating parameters.  No express warranty is implied with pulsed laser operation.

    Power threshold is very dependent on wavelength and operational mode and system optics and interpretation can be very subjective.  Therefore, we do not publish any values for power damage threshold.

    I hope this helps.

    Fizix

  • Thanks for the response.

    The maximum power output of the laser system that we are using is 12 W. Is this level of power something that this DMD can handle?

    Hoa

  • Hello Hoa,

    You definitely want to read the application report. The shorter the wavelength the more energy in each photon. It is not the heating of the array from the light, but the affect of lower wavelengths on the device. The linked report will give insight into this.

    Any operation outside the specifications of the data sheet are not warranted. If you do proceed, please provide a very robust thermal solution to keep the DMD temperature as close to room temperature (25 °C) as practical. You will almost certainly need to design a water cooled solution to achieve this.

    I hope this helps.

    Fizix
  • Is there a way to purchase a sample of this DMD? Without any testing, it is very difficult to tell if this DMD will work with the laser system that we have here.'

    Hoa

  • Hoa,

    These can be purchased.  Here is a link to the starting page:  http://www.ti.com/product/dlp9500uv/samplebuy#this

    Currently it only shows DigiKey and Mouser as having any stock.

    Fizix

  • The link doesn't seem to work on my end. Can you try another link or the direct link to the product page from those 2 companies?

    Also when I said "sample" I meant a test sample that we can try out to check basic compability and functionality, not the actual product.

    Thanks!

    Hoa
  • Hoa,

    The product page is here:  http://www.ti.com/product/dlp9500uv 

    For  DigiKey.com or Mouser.com, simply type that in the browser and then search for DLP9500UV on their site.

    Regarding "samples", we do not provide samples for these DMD chips.  We are sorry for the inconvenience.

    Fizix

  • Is there a possible way to have a rough idea of how this chip will behave under a high power low wavelength beam? My research group believes that this DLP chip is perfect for our system's application if it is functional under the circumstances that I mentioned. Obviously we are concerned about the power level as well as heating up this DMD chip but we are more or less shooting in the dark without any testing or data that is related to our case. Is there any other information that you can provide us that can help us to maybe create a test set up that is similar to the micromirror so that we can predict the actual chip's behavior?

    Hoa
  • Hello Hoa,

    Please read the application report that I have referred to.  I describes how it is likely to behave.  However with the higher power and lower wavelength the effects will be accelerated.  This document should give a rough idea of what to expect.

    Fizix