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Maximum power?

Albert Castiella
Prodigy 70 points
Other Parts Discussed in Thread: DLP4500NIR, DLP4500

Hi!

I would like to know what is the maximum power (mW/cm2 and Lumens) of the DLP4500NIR, in datasheet explain that maximum power is Thermally limited. And another question isif I can get or force to get emit with the maximum power with the DLP LightCrafter 4500.

Thanks.

  • 0
    TI__Expert 5485 points
    Hi Albert

    Welcome to E2E and thank you for your interest in DLP technology.

    Our team will get back to you soon regarding your query.

    Regards
    Azad
  • 0
    TI__Mastermind 20045 points
    Hello Albert,

    You are right that the maximum power is thermally limited; therefore, we do not have absolute power numbers. If you are illuminating the DMD with <700nm wavelength light then you will be limited to 0.68mW/cm^2. If you are using >2500nm wavelength you are limited to 10mW/cm^2. I would expect the maximum power to be somewhere in between for wavelengths >700nm and <2500nm. However, this is not guaranteed and would have to be tested and the temperature of the DMD would then need to be measured to ensure it is within limits as discussed in the datasheet.

    Also note the DLP LightCrafter 4500 is using the DLP4500, not the DLP4500NIR.

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Prodigy 70 points
    Thanks a lot!

    I would like to do some questions:
    I'm interested to work with a DLP4500NIR in a Near IR range (700 nm – 1400 nm). I'm interested in maximum power of this range. More or less what's the maximum power (W/cm2)?

    Can I improve the cooling to achieve more power?

    Finally, we can mount a DLP LightCrafter 4500 with a DLP4500NIR?

    Thanks!
  • 0 in reply to Albert Castiella
    TI__Mastermind 20045 points
    Hello Albert,

    See above for the maximum power answer. It is limited by cooling and therefore can be better or worse depending on your cooling design. I would expect somewhere in the range of .68 - 10mW/cm^2 but this could be better or worse depending on your cooling.

    You should be able to physically mount a DLP4500NIR DMD in the LightCrafter 4500. However, the optics are not intended for the NIR spectrum. You may instead be interested in this DLP4500NIR platfrom by Anhua which can be controlled using the same software as the Lightcrafter 4500: www.anhuaoe.com/.../268

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    TI__Mastermind 20045 points
    Hello Albert,

    I was recently made aware of additional information. If you look at section 7.5.2.1 of the datasheet you will see an example temperature calculation for power of 2W/cm^2. We have seen customers run over 5W/cm^2 with good thermal cooling using the FQD package. Hopefully these numbers help give you an idea of what is possible.

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Prodigy 70 points

    Thanks a lot!

    You are helping me a lot!!

    Is very interesting this:

    "I was recently made aware of additional information. If you look at section 7.5.2.1 of the datasheet you will see an example temperature calculation for power of 2W/cm^2. We have seen customers run over 5W/cm^2 with good thermal cooling using the FQD package. Hopefully these numbers help give you an idea of what is possible."


    What type of cooling used customers to work at 5W?

    Also, do you know more or less how many Lumens that produce this NIR chip?



    On the other hand, you told me:
    "You should be able to physically mount a DLP4500NIR DMD in the LightCrafter 4500. However, the optics are not intended for the NIR spectrum. "

    The optics can be "cut" the spectrum and not work properly?

    "You may instead be interested in this DLP4500NIR platfrom by Anhua which can be controlled using the same software as the Lightcrafter 4500: www.anhuaoe.com/.../268"

    With this plattform, can I work with more power than your DLP Lightcrafter 4500?

    Many thanks Kyle!





  • 0 in reply to Albert Castiella
    TI__Genius 10925 points

    Hi Albert,

    Here are the efficiencies of different parts as mentioned on DLP4500NIR Datasheet, using these the lumen output can be calculated.

    • Window Transmission Efficiency 96% Nominal (700 to 2000 nm, Single Pass Through Two Window Surfaces)
    • Window Transmission Efficiency 90% Nominal (2000 to 2500 nm, Single Pass Through Two Window Surfaces)
    • Array Fill Factor 92% (Nominal)
    • Mirror metal specular reflectivity (700 nm to 2500 nm) 89%

    The Optics of DLPLCR4500 has been designed to steer light having wavelength in the visible spectrum. If NIR light is used in this arrangement, light of some NIR wavelength can be absorbed by the optical arrangement itself, thus giving incorrect readings on the sensor.

    With the DLP4500NIR platfrom by Anhua, the optics are specifically designed for NIR wavelengths, there by increasing both optical and thermal performance in the NIR range. 

    Hope this resolves your queries,

    Regards
    Hirak.