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DLP2010NIR: Binary Rate Meaning and Available Rates

Trevor Ivanov
Prodigy 10 points
Part Number: DLP2010NIR
Other Parts Discussed in Thread: DLP4500NIR, DLPC150, DLPC350, DLP650LNIR, DLPC410

Tool/software:

Hello,

I am looking for a definition of the binary rate in terms of micromirror motion.  For instance the DLP2010NIR the binary rate is stated as 2880 Hz.  Is this the rate for one full cycle from max deflection (17°) back to flat (0°)?  Can this rate be sped up by going to smaller deflections (i.e. 0° to 5° at 4000 Hz)?

I am also wondering what the upper bound on this binary rate is in your product offerings.  Is 2880 Hz binary rate the fastest or are there other devices that can switch faster?

Thank you,

Trevor

  • 0
    TI__Guru 54705 points

    Hello Trevor,

    The DMD has only two operational states - "on" and "off". The mirrors do not return to 0° between these states.  For a given pixel on the array, if the data has not changed the mirror undergoes a small perturbation in its position and returns to its state.  If the data has changes the mirror moves to the new position.

    The DLP2010NIR DMD loads an entire array at one time.  The 2880 Hz is the fastest that it can load and display 1-bit patterns.  

    There are other controller/DMD combinations that can run faster.  What are your requirements?

    Fizix

  • 0 in reply to Fizix
    Prodigy 10 points

    Hi Fizix,

    I was hoping for closer to 6-7 kHz operation.  Are there windowed modes (using a smaller ROI over the device) that could update faster?

    Follow on question regarding the on and off states - where do the mirrors go between these states? And where do they point when in the on and off states? Presumably we can command them to point anywhere in the 0-17° range, is that correct?

    Thank you,

    Trevor

  • 0 in reply to Trevor Ivanov
    TI__Guru 54705 points

    Hello again Trevor,

    The DLPC150 controller / DLP2010NIR does not have an option for a smaller ROI.  We have other devices that do.  I assume you are wanting DMDs with NIR windows.  What wavelength range are you wanting to work in?  The DLPC410 / DLP650LNIR might work, but requires some development to get the speeds you want.  The DLPC350 / DLP4500NIR combination does not reach the speed you require and if you are working in 1550 nm the diffraction efficiency is very poor.

    The DLP2010NIR device points to the left edge in the "on" state and toward the bottom in the "off" state.  Please see the data sheet:

    When transitioning between states, the mirror "rolls" on the tilted axis shown, so that the lower left corner remains landed.

    The mirrors transition in a few microseconds.  They cannot be set to point in any direction.  There are only two "operational" states - "on" and "off".

    Fizix