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DLP9500: Can Visible light works in Near infrared (NIR) light?

user4998455
Prodigy 50 points
Part Number: DLP9500

Hi, All:

I am using a DLP Discovery 4100 development kit with DLP9500 visible light DMD. I have to deal with infrared light by this visible light DMD. From TI technical documents I know that this DMD has Corning 7056 coat, and Transmission Curves shows in this link:

http://www.ti.com/lit/pdf/dlpa031

I really want to know can my DLP9500 DMD work with infrared light, such as 1064nm wavelength or even longer ? Will infrared light cause more damage to DMD?  What is the damage tolerance of infrared light for DLP 9500?

Best regards.

Bourne

  • 0
    TI__Mastermind 43135 points

    Hello Bourne,

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

    The transmission curves are well behaved outside of the pass band that they were designed for.  The DMD data sheets show for each device the power levels that we will warrant the device for outside of the band that they were designed for.  Operation outside of that band voids any warranty.

    With that disclaimer, the primary damage concern in the infrared is the AR coatings on the DMD window. 

    How much power are you wanting to throw at the DMD?

    Fizix

  • 0 in reply to Fizix
    Prodigy 50 points

    Hello Fizix, thank you for your answer. From TI technical information I know that when wavelength is longer than 700nm, incident light power should be lower than 10mW/cm^2(see the fig)

    So if I illuminate my DLP 9500 lower than 10mW/cm^2 with 1550nm CW laser， Can I safely conduct my experiment?

  • 0 in reply to user4998455
    TI__Mastermind 43135 points

    Hello Bourne,

    You should not experience any damage issues at those powers. 

    The only issue you may have is lower throughput efficiency due to lower transmission of the A/R coatings.  This may also generate some reflection / ghosting issues from a second bounce of the beam.

    Let us know how it goes.

    Fizix