GMU:DIY-Microscopy: Difference between revisions

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* resolution is 960 x 640 pixels
* resolution is 960 x 640 pixels
* physical size is 75 x 50 mm
* physical size is 75 x 50 mm
[[File:iPod touch screen measuring size.png|150px]]
Hence we can calculate the pixel density of the device:
Hence we can calculate the pixel density of the device:
* 0,078125 mm per pixel (or 12,8 pixels per mm)
* 0,078125 mm per pixel (or 12,8 pixels per mm)