D435 Operating Temperature Test
HI,
I know that the official operating temperature is 0-35 degrees C. But I make a test that a D435 is put in a incubator with 45°C for two hours. The projector still worked well and the depth map was high quality. A same test is made in -15°C and the depth map remains unaffected. So how to explain it？ Is the test time too short？
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The internal temperatures of the camera (the heat around the 'ASIC' camera circuit board and the projector if the camera model has one) are affected by environmental temperature (such as the air temperature inside your incubator) but not directly set by it.
https://github.com/IntelRealSense/librealsense/issues/5209#issuecomment-563358823
The camera has a laser safety mechanism that checks that the projector temperature is not less than 0 or greater than 60. If the temperature is detected to be above 60 for more than several seconds then it first halves laser power to try to bring the temperature down and then shuts the laser off if the projector temperature continues to exceed 60. The laser will also shut off if the projector temperature is less than zero.
The true measure of the camera's temperature is not the incubator temperature but the ASIC and the Projector temperature. These are accessible through scripting or can be viewed easily in real time in the 'Controls' section of the RealSense Viewer program's options side-panel.
https://github.com/IntelRealSense/librealsense/issues/866
Although an official maximum operating temperature of 35 degrees C is suggested, the camera should be able to operate at 42 degrees operating temperature in practical real world conditions before problems in the image start manifesting beyond that temperature.
The May 2020 edition of the data sheet document for the 400 Series camera changed how maximum temperatures are stated. Instead of a 35 degree operating temperature maximum, it now recommends a 50 degree maximum casing temperature. Please see page 42 of the May 2020 data sheet for the details.
https://dev.intelrealsense.com/docs/intel-realsense-d400-series-product-family-datasheet
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