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DLP9000X: laser power threshold over DMD mirror

NOBUTERU TAKASHIMA
Prodigy 60 points
Part Number: DLP9000X
Other Parts Discussed in Thread: DLP9000

Hello 

i am reading the manual to find the threshold of the DLP9000X and found that it is 10W/cm2 on page 13 ( middle ) . However my customer mentioned that the laser power over DMD mirror should not exceed 2.5W/cm2 . i would like to know which number is correct . Please advice . 

Alon 

  • 0
    Prodigy 60 points

    Part Number: DLP9000X

    Hello My name is Nobuteru Takashima 

    I posted last week about the laser power threshold over DMD mirror but no answer yet received and posting it again . does someone know the threshold of laser power over DMD mirror ? is it 10W/cm2 ? 

    best regards,

    Nobuteru Takashima 

  • 0 in reply to NOBUTERU TAKASHIMA
    TI__Mastermind 43125 points
    Hello Takashima-san (Alon),

    The current specification for wavelengths from 400 nm - 420 nm is 10 W/cm2 as listed in the table on page 13. From 420 nm to 700 nm it is thermally limited.

    Can you ask the customer where the 2.5 W/cm2 came from?

    Fizix
  • 0 in reply to Fizix
    Prodigy 60 points
    Hello Fizix
    good afternoon and thank you very much for your reply . I heard from my customer that TI engineer mentioned do not exceed 2.5W/cm2 over DMD mirror nor it may be damaged during process to select the DLP9000 series . However when we checked the manual only threshold we found was 10W/cm2 . we are using 405nm wavelength so according to the manual it is ok to go up to 10W/cm2 power over DMD mirror correct ?
  • 0 in reply to NOBUTERU TAKASHIMA
    TI__Mastermind 43125 points
    Hello Takashima-san,

    What wavelength range are they working in?

    I do know early on our power specification on some parts for lower wavelengths was more restrictive. After extensive testing the specifications were relaxed a bit.

    Fizix
  • 0 in reply to Fizix
    Prodigy 60 points

    Hello Fizix san

    I am using 405nm +/- 5 nm wavelength.

    With this wavelength are we able to go up to 10W/cm2 laser power over DMD mirror?

    Please note that this question is about laser intensity over DMD mirror.

    Best regards

    Alon Nobuteru Takashima

  • 0 in reply to NOBUTERU TAKASHIMA
    TI__Mastermind 43125 points
    Hello Takashima san,

    Your customer's wavelength is within the wavelength range. Please notice the footnote that the customer must still meet array temperature specifications.

    This specification also applies to CW laser illumination as well. Pulsed laser has a few more considerations such as peak power, pulse duration and duty cycle.

    Fizix