Another mystery head quiz

[Chuck Guzis]

I was goofing around with an old digicam (Fuji MX700)and wondered if I 
could stick it on the eyepiece of my old B&L Stereozoom inspection 
microscope.  Aside from the obvious problem of using LEDs for 
illumination, it looks like it works.  Maybe it's not time to toss the 
old camera.  (FWIW, the illumination is a freebie 9-LED flashlight, 
which just happens to fit the scope stand--I run it from a old 4.5V 
cellphone charger.

At any rate, who can identify the head in this photo:

http://i.imgur.com/mN9v33b.jpg

I'm pretty certain that I know.  It's about 16mm square and is mounted 
on a small PCB with lead connections.

--Chuck