From the sound of it, Nanometrics Inc.’s acquisition of Accent Optical Technologies Inc. was one big reunion where everyone knew each other. But lead Wilson Sonsini Goodrich & Rosati partner Aaron Alter, representing Nanometrics, insists the $80.9 million deal was no party. “It was work,” he said.

Nanometrics’ ties to Wilson Sonsini go back more than 30 years, Alter said, when Larry Sonsini first incorporated the Milpitas-based company. Nanometrics sells optical equipment to the semiconductor industry.