Where did you find pictures of the scope itself?Ī similar issue I've had recently (though not quite as thoroughly hard to track down) was on Leica's GZ7. ![]() So my guess would be that as demand for high end wafer inspection scopes started to take off they first configured some of their microphots for that purpose before launching the optiphot line specifically designed for industrial use as a more systematic approach to the problem. I'd guess that this was an early response to increasing demand for compound scopes for wafer inspection-this was also about the time that Bausch and Lomb put out their microzoom series of compound industrial scopes as the stereozoom 7 no longer had the needed magnification and resolution for higher complexity chips. The '-L' clearly just stands for 'Large', and it was probably just a normal microphot configured with a larger stage and epi illumination to accomodate wafer inspection. The microphot line launched in '85, and the optiphot in '87 if their site is to be believed. It's described as "a research microscope that featured a large stage that could accommodate semiconductor microchips". ![]() There's no guarantee that they made many of the "FXL" variant in the first place. The microphot line launched 35 years ago.
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