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DLPNIRNANOEVM: what could be the reason for big deviation from dark scan curve frequently?

Part Number: DLPNIRNANOEVM

Hi,

I'm tried to unplug the connector with the black/red wires so to disable the built-in lamp and test the dark scan curve, it was successful, but I found that there's 1/5 ~ 1/10 percent scan is with an abnormal intense, up to ~300. For a dark scan without light source, I think it should have such high intense. Could you help to check if there's method to improve?

Here is my setting and the result;

 Hadamard loca_339215_20231105_033330_abnormal.csvHadamard loca_339214_20231105_033329_normal.csvHadamard loca_339205_20231105_033239_abnormal.csvHadamard loca_339210_20231105_033324_normal.csv