crwdns2936637:0crwdne2936637:0 crwdns2853008:0crwdne2853008:0 crwdns2918746:0crwdne2918746:0

crwdns2933803:07crwdne2933803:0

crwdns2933797:0Sam Goldheartcrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Sam Goldheart

crwdns2933769:0crwdne2933769:0
crwdns2933771:0crwdne2933771:0
crwdns2933801:0crwdne2933801:0

crwdns2933807:0crwdne2933807:0

[* black] This little guy reads its position hundreds of times per second; we must figure out how!
-[* black] We first turn to the imaging lens and light guide. We poke, prod, tweeze, and say "please," but it won't relinquish any of its secrets.
- [* black] The lens/light unit is anchored down by two tiny plastic rivets. They may be lightweight, but they don't survive the removal process.
-[* black] The light guide directs infrared illumination from an LED down to the track, while the lens directs images back onto the board's image sensor to read the track patterns as they whiz by—a lot like an optical mouse.
+[* black] The likely suspect seems to be hiding behind a light guide/lens assembly. We brought it in for questioning.
+ [* black] The lens/guide unit is anchored by two plastic fasteners. They may be lightweight, but the removal process limits their future fastening ability.
+[* black] The infrared light from an LED is channeled through the light guide to illuminate the track, allowing the imaging sensor to read the patterns as they whiz by the lens—a lot like an optical mouse.