These series need to go into MUCH more detail to be interesting.

Start by disassembling the laser head. You'll find all sorts of cool technologies used to suspend the head, focus and follow the track it's reading/writing.

Then there's the optical parts that include mirrors, lenses and beam splitters to enable the laser and the read head to use the same lens and "see" the same spot on the disk.

You may have guessed I recently did the same "dissassembly" myself. Hours of entertainment to be had. Just make sure you never want the device to work again!

Regards