Trying to make a vision IF and Detector - fun!

[peter scott]

The screen width is 67mm so with a 0.7mm spot you can resolve 95 points which in terms of grating lines is half that say 47 white and 47 black. The test card doesn't fill the full width of the screen. Let's say 90% so you can resolve 42 cycles in 81uS or 522kHz. If you can resolve the 1MHz bars then it suggests a spot size of about 0.35mm.

I didn't look at you working but I'd say we agree.

Peter