In‐process monitoring within 3D printing systems is desirable. There is often a source of light which
is necessary for the 3D printing process. This is often an intermittent illumination. In‐process
monitoring systems require constant light conditions. This disclosure concerns active control of LEDs
placed within the process chamber to achieve a constant light condition.
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INC, HP, "CONSTANT CHAMBER ILLUMINATION OF 3D PRINTING PRINTZONE", Technical Disclosure Commons, (November 29, 2018)