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Beautiful mirror convexMirror edge on a Spyderco PM2 in S110V steel done on Paper Wheels with diamond compounds.
Pics taken with a cheap USB microscope.
Post your coolest microscope images
- Thread starter eKretz
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I'm sure I can dig up some more. Here are a pair I took recently. These are of a Feather AC Pro disposable straight razor blade. 1,000x optical. First in DIC then darkfield. Amazingly straight edge at 1,000x. The DIC really brings out features that are almost invisible in regular brightfield or darkfield. It is an amazing thing to have. Looking at the uoper image the edge can be seen to be very slightly convexed toward the apex. The width of that convexity is probably best measured in single digit microns. Sure wish I knew how they did the sharpening on those.
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Here's a another brand of safety razor "TREET"I'm sure I can dig up some more. Here are a pair I took recently. These are of a Feather AC Pro disposable straight razor blade. 1,000x optical. First in DIC then darkfield. Amazingly straight edge at 1,000x. The DIC really brings out features that are almost invisible in regular brightfield or darkfield. It is an amazing thing to have. Looking at the uoper image the edge can be seen to be very slightly convexed toward the apex. The width of that convexity is probably best measured in single digit microns. Sure wish I knew how they did the sharpening on those.
There appears to be a coating at the edge that has birefringence under polarized light.
Here's a another brand of safety razor "TREET"
There appears to be a coating at the edge that has birefringence under polarized light.
Yes, probably so. The Feather blades are coated also; I clean them with IPA and a KimWipe before trying to get an image. They won't cut a hair with the HHT until they're cleaned, the coating prevents it. Of course, it's pretty difficult to get them clean enough so that they actually look *clean* at 1,000x, heh.
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I have a project blade that might be pretty neat I'm working on, give me a few days. If I forget, bump again.
In the meantime, here is a good demonstration of why DIC > brightfield. These are of a honed but unstropped straight razor edge. DIC shows what would appear to be a bit of wire edge that's nearly invisible in brightfield.
Brightfield:
DIC:
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