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DLP4710: size of gap between two pixel, micromirror fill factor and reflectivity

Matthieu Dvorak
Prodigy 50 points
Part Number: DLP4710
Other Parts Discussed in Thread: DLP4500

Good Morning,

I need a few more details regarding the optomechanics of the DLP4710.

- what is the width of the gap between two TRP micromirrors? (in % of Pixel pitch or in mu)

- what are the values of the "Micromirror array fill factor" and of the "Mirror metal specular reflectivity"? (both values are provided for example for the DLP4500 (§7.10, p22)

- is the "Mirror metal specular reflectivity" the reflectivity of a single Micro Mirror or of the whole DLP array?

- can one assume that the reflectivity of a micromiror is identical in the middle and on the border of the Mirror? Or should we expect a loss of reflectivity along the micromirror border, resulting in an effectively increased gap?

Thanks in Advance for your information

regards

Matthieu

  • 0
    TI__Mastermind 22840 points

    Hello Matthieu,

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

    DLP4710 DMD uses TRP architecture pixel. The effective/optical  fill factor for incident light is ~93% for TRO DMD.  The micromirror gap for TRP pixels is not published specification. This is manufacturing process control parameter.

    The reflectivity is typically uniform across a mirror.

    I do not agree with that statement  "should we expect a loss of reflectivity along the micromirror border, resulting in an effectively increased gap?". 

    regards,

    Vivek