A C172 EXPERIENCED AN NMAC WITH AN EXPERIMENTAL AT UNCTLED FIELD F45.

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EVENT OCCURRED AT F45 (NORTH COUNTY GENERAL AVIATION ARPT). I WAS GIVING INSTRUCTION TO A STUDENT PLT WITH APPROX 6 HRS TOTAL TIME; ALL DUAL. WE WERE MAKING A NORMAL APCH TO LNDG ON RWY 13. WE HAD BROADCAST ON CTAF WHILE ON XWIND; DOWNWIND; BASE AND FINAL. AS WE WERE APPROX 35 FT OVER THE APCH END OF THE RWY; A SMALL EXPERIMENTAL TOOK OFF FROM RWY 26R. HAD BOTH ACFT NOT MANEUVERED TO AVOID; THERE WOULD HAVE BEEN A COLLISION. AFTER LNDG; THE PLT OF THE EXPERIMENTAL ACFT APPROACHED ME ON THE RAMP. HE WAS VERY APOLOGETIC AND AWARE OF HIS MISTAKE. HE STATED THAT HE DID NOT HAVE A RADIO IN HIS AIRPLANE AND HE THOUGHT HE HAD LOOKED; BUT OBVIOUSLY HE HAD MISSED SEEING US. HE WAS ADAMANT THAT HE WOULD NOT LET THIS MISTAKE HAPPEN AGAIN. CONTRIBUTING FACTORS: 1) THE SUN WAS VERY BRIGHT IN THE EYES OF THE PLTS IN THE C172; MAKING IT DIFFICULT TO SEE THE EXPERIMENTAL ACFT. 2) THE EXPERIMENTAL ACFT DID NOT HAVE AN OPERATING 2-WAY RADIO; AND DID NOT CLR ALL SECTORS PRIOR TO TAKEOFF. 3) F45 IS A NON-TWRED FIELD DESPITE A HVY TRAINING AND CORPORATE USE TFC LOAD.