This came out of a huepar laser sensor for a laser level like you would find at a home improvement store.
The front has a field of wires going horizontally, split into two fields, above and below the middle line. It detects when the laser level is hitting above, below or right on the line.
There are three connections at the top that I believe are: (+) for top field, (-) ground, (+) for bottom field. There is also a connection at the bottom that is ground as well. I assume the circuit measures the difference in voltage generated by the top and bottom fields.
The dimensions are about 1.25" x 1.25".
I would like to know what type of component it is so that I can start my research and figure out how to build my own circuit using this.