Friday, May 15, 2026
New Probe Levelling Reduces Subtracive Dot Size
I used the probe-wriggling levelling technique to do the "Hello World" thin with pixels spaced at 30μm. As you can see, the more accurate probe height results in much smaller impacts on the left. The slide appears to not be correctly levelled on the right and the dots smear out a bit as the probe slides under downward pressure.
You can't see half the dots using the USB microscope. This shot was taken with the bench 'scope using strong underlighting. If I level the slide you can expect more fine dots of the size that appear in the 'H'. Those seem to be <10μm across. I'll do a bit more levelling and then use the wiggle technique to estimate the height of a deposited resin dot. That'll be hard data.
