Larry:
Someone posted some SEMs of hand plane blade
edges on the Wreck (rec.woodworking, Rio Lindaers) half a dozen years
ago. It's probably googlable.

Maybe this is it. They're not SEMs, but lots of info/microscopy
pictures on his work sharpening wood plane irons:
Brent Beach’s faqs: http://www3.telus.net/BrentBeach/Sharpen/jig%20faq.html