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Blu-Ray Optics Notes
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Info on other blu-ray optical pickups:

http://repairfaq.cis.upenn.edu/Misc/Blu-ray/site1/optics.html

The one we're dealing with is very miniaturized in comparison, and seems to
generally have fewer components. It's possible that some of the advanced
optics were eventually replaced with better quality lenses or more DSP processing?