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DLP4500: Maximum power illumination in 405 nm wavelength

Yaron Bromberg
Prodigy 30 points
Part Number: DLP4500
Other Parts Discussed in Thread: DLP7000,

HI,

I saw in the product's datasheet in section 7.4 that the maximum illumination power is 0.68 mW/cm^2 in the range under 420 nm wavelength.

But in other products like dlp7000 there was a different section that said on the range of 400-420 nm it can be illuminate with power up to 11 W/cm^2.

I wonder why there is such a big difference between the two products and maybe my dlp4500 can be also illuminate in 405 nm with more power then 0.68 mW/cm^2

This would help me a lot because I need the use a blue laser (405 nm) in order to perform my experiment.

Thank you in advance,

Elyasaf

  • 0
    TI__Mastermind 23070 points

    Hi Elysaf,

    Welcome to DLP forum and thank you fro your interest  in DLP technology. 

    DLP7000 DMD is in type A package and is designed  to support higher brightness, illumination intensity and thermal.  The DLP4500 is designd to support a wide  visible spectrum (420nm to 700nm). and relatively lower illumination and thermal capability. 

    What is target laser power for your application?

    If DMD is operated outside specification limit, it will result in reduced operational life except  when intensity is too high to cause an immediate catastrophic damage.  

    regards,

    Vivek

  • 0 in reply to Vivek Thakur
    Prodigy 30 points

    Hi Vivek,

    Thank you for your quick response.

    I need to use the 405 nm laser (actually is 404 nm) at power of about 50 mW.

    Do you know to tell how this will affect the useful life of the DMD?

    What the operational lifetime in normal uses?

    Best,

    Elyasaf

  • 0 in reply to Yaron Bromberg
    TI__Mastermind 23070 points

    Hi Elyasaf,

    Thank you for your patience. 

    "What the operational lifetime in normal uses?"

    The DLP4500 is designed for the consumer application like personal electronics . TI warrants the DMD  for 1 year if used as per specification.

    "I need to use the 405 nm laser (actually is 404 nm) at power of about 50 mW."

    The 50 mW laser should will not create any concern thermally. However, a very small spot size with same power could create  high localized heat and do catastrophic damage.

     

    "Do you know to tell how this will affect the useful life of the DMD?"

    The operational life of the DMD  depends on several factors like environment, temperature , wavelength etc.  If purpose  is to run experiments then it may be OK at this low power. However, if you intend to build product then I would recommend either use a DMD a which qualified for the target wavelength or run your own in house system test for useful life.

     

  • 0 in reply to Vivek Thakur
    Prodigy 30 points

    Hi Vivek,

    Thank you for your detailed answer.

    Best regards,

    Elyasaf

  • 0 in reply to Yaron Bromberg
    TI__Mastermind 23070 points

    You are welcome. Please let us know if you have further question.

    regards,

    Vivek