This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DLP9000: Mirror reflectivity at different wavelengths

Part Number: DLP9000


I have a question about the micromirror reflectivity at various wavelengths in the visible range. Is the reflection spectrum consistent with that of regular aluminum, or is there some sort of dielectric reflective coating on top?

The documentation on "DMD optical efficiency for visible wavelengths" states that the micromirrors are "aluminum based," and that they are "nominally 89% reflective in the visible range." However, I need to know how thermal loads compare at both 532nm and 638nm, so I need to know if/how the reflectivity differs between those two wavelengths.

Thank you!


  • Hello Sarah,

    Thank you for your inquiry. 

    Yes, the reflection is consistent across the visible wavelengths that you highlight. The mirrors are indeed aluminum based, and you can proceed with your calculations based on this information.

    Sorry, we cannot share more details on the proprietary manufacturing process. Please let us know if you have further questions for your application.