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DLPLIGHTCRAFTER: Help calculating the micromirror array temperature

Part Number: DLPLIGHTCRAFTER

Hello, 

I am using the DLP Lightcrafter with the light engine removed as a spatial light modulator for a 450 laser. I have not yet illuminated the DMD with laser light, as I am not confident in my calculation of the array temperature. My confusion lies in the TCeramic value given in the datasheet (55 C). I am not sure where this value comes from, and I'm not sure how I would determine this experimentally, either. Also, I have included a formula that I derived from the datasheet that will give me the laser power corresponding to a specific temperature delta: DMD Array Temperature Formula.docx

Any thoughts are greatly appreciated. Thanks!