That is bronze coating on the canopy. Helps with sun glare and microwave energy. Cars that have that coating like the Lincoln Mark series have problems with radar detectors not detecting police radar through the windshield.
Like I said Buzzard, it's gold. I'm pretty sure TEXSTAR still makes canopies for the guys in Fort Worth. They did when I worked on the F-16. If you're curious, research the
HAVE GLASS program.
You're right about the car windshields. The coating has the same effect on police radars... bad for your detector.
The location of the green patch forward of the canopy suggests it's one of the 30+ antennas for the AN/ALR-94 Passive Receiver System. In fact, I'd say
all the green patches in the photos are antennas for this system. Sorry, no cloaking device, death ray projector, etc. I could be a soft ice cream dispenser though.

This should entertain you guys:
http://www.f22fighter.com/AffordableStealth.pdf