[demlosers]

MiG-29s and Su-27s have a little-known tracking device called the OEhPS, or Electro-optical Search and Track, sometimes known as Infrared Seach and Track. This device can detect the heat of an aircraft and is not bothered by radar-jamming or minimalization.

Intercepting Ruskie fighters?

If I recall, vintage U.S. fighters from over 40 years ago carried optical infrared targeting sensors like this F-101 Voodoo:

And the contemporary F-14 Tomcat carries the Infrared Search and Track System (IRSTS).

[struwwelpeter]

Beautiful pictures, thanks for the info :-)