Spot ID v2 - image calibration

[snowdrop6]

Hello,

In the 'Optics' menu, there are two inputs for calibration, which are 'Camera Length' and 'Pixel Size'. I'm not sure how to set those values.

Usually, camera length of DP images are not well known and correct. So I use the pixel size to calibrate the DP images. But the dimension in DP should be reciprocal. However, in the 'Pixel Size', the value is mm unit. So I'm confused.

Please guide how to set the values to properly calibrate DP images. Thanks.