Hey Dick.
Check out this doc from a few years back...
http://www.usfirst.org/sites/default...icsR2-rev2.pdf
The IR seeker is made using 5 discrete sense elements. Each element has an approximate 60 Degree sensitivity area. These also overlap each other by about 5 degrees to form a dusl sense area (beam). This overlap is usefull because it provide a narrow sense area, but there is not one that is centered on the "forward" direction of the seeker.
If you want to understand it beter, chek out some related IR seeker links here:
http://www.usfirst.org/roboticsprogr...ionalresources
__________________
Phil Malone
Garrett Engineering And Robotics Society (GEARS) founder.
http://www.GEARSinc.org
FRC1629 Mentor, FTC2818 Coach, FTC4240 Mentor, FLL NeXTGEN Mentor