What is a defense for a following too close ticket from "accident" where there was no visible damage on scene or from insurance?

I was involved in a traffic incident at a redlight where the other driver claims I hit her. I know i did not hit her because there was still space enough where I could see distance between our bumpers, I felt no impact and there was no visible damage. I think she either hit the car in front of her or locked up her brakes too hard because she claimed she felt a bump. It was a new car (no tag yet even) and I believe the young girl was a bit hysterical that she had possibly ruined her new car. When the officer arrived on scene I claimed I didn't hit her and she claimed I did. He then proceeded to write me a ticket for following too close even though I explained that we were stopped at a redlight and that I was not following too close. She filed on my insurance but the adjuster found no damage