Kobo mini mystery optical components
Opening my Kobo Mini revealed this ring of (what appear to me to be) sensors and emitters. Two edges have clear packages, two edges are dark. What are they for? There's a little wall of scalloped lenses in the case too.
Impressed with the Kobo hardware a lot. Easy to open up, easy to telnet into, source available (ish), brass inserts for the screws, no glue or hidden fasteners. Hacker friendly - 10 out of 10.