Where r is the distance from the optical center. If NXmep200 didn't do this, your 500µm measurement would be 520µm at the edge of the frame.
Let’s walk through a real-world scenario: Examining a cheek cell smear.
Color cast or incorrect white balance:
Behind the scenes, it interpolates the lens distortion. Most cheap microscope objectives have barrel distortion. When you measure a circle, the software first applies a polynomial correction: Corrected_X = Pixel_X * (1 + K1 * r^2 + K2 * r^4)
Right-click the .exe file on Windows and select "Run as administrator" to ensure system drivers install properly.
: Often plug-and-play using the built-in Windows Camera app, though advanced measurement requires third-party software like Smart Camera .
