PixArt IR sensor specs

Hi there!
I really need to know some of the specs of the IR camera of the wiimote. The FOV for example.... Is there any datasheet??
I have been looking for it in PixArt's webpage (http://www.pixart.com.tw/) but I couldn't find anything.
The real name of this camera??
Thanks a lot!!!

There is no public datasheet. The FOV is about 21.3 degrees to either side (42.6 total) horizontally, and 3/4ths of that vertically.