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Maximum Illumination Power for DLP4500NIR

tom delonge
Prodigy 40 points
Other Parts Discussed in Thread: DLP4500NIR

Hi,

I have an application for beam shaping and I would like to use the DLP4500NIR. The illumination source yields powers of 2W at NIR (800nm). However, in this application, the power is not evenly distributed among the pixels. It might happen, that one pixel gets hit by up to 70mW for 10microseconds or so.

Since this is going to be used solely in academic areas, I could even cool down the device using liquid nitrogen. However I wonder whether the mirrors will take damage of this kind of operation?

Thanks for your help!

  • 0
    TI__Mastermind 30600 points
    Hi Vincent,

    It is possible to damage the mirror, although it is difficult to say exactly which point that will occur at. These devices are thermally limited in terms of the amount of power they can take. For long term use, keep the device below 65 degrees C. Use the guidelines laid out in section 7.5 of the datasheet for the DLP4500NIR which details the thermal calculations for estimating the case temperature and other salient thermal parameters.

    I realize this isn't the most clear cut answer, but we don't have all the scenarios characterized. I recommend that do some testing on your system where you gradually ramp up the power a single pixel and see if any failures occur. With proper cooling (liquid N2, heatsinks, etc.) you can likely achieve what you're looking for, especially over short times.

    Hope that helps,
    Paul