Interesting! Do you know that or it it a guess? I've never seen a sensor of this type used for laser head positioning, normally they position by finding focus on the ident track on the DVD and some units may have an optical interruptor sensor on the mechanicals.From what little I can figure out, the board came from a DVD player.
I believe that the IC you have there was used to determine the position of the laser head.
No, just different voltages out on the two wires connected to it depending on which horizontal "ribbon cell" section the laser hits. I'm assuming that if you look very closely, you'll see hundreds or more small lines across the narrow side from top to bottom. Each is a photocell that will output a slightly different voltage when illuminated, so the output of it will "say" where the light is pointed at on it by a different voltage.There's a very good chance it came from a laser printer. I DO remember disassembling one. Since there's an IC, does that mean output would be digital?
by Steve Arar