Measuring lens centering, air spacing and center thickness inside an assembled optical system is now possible with a single instrument. The OptiCentric 3D from Trioptics GmbH offers optomechanical characterization of assembled optical systems. It integrates various lens analysis technologies and provides a tool for the evaluation of complex optical systems in R&D or routine quality inspection applications in production. The two-in-one solution for the detailed investigation of assembled objective lenses combines the OptiCentric centering error measurement technology with a low-coherence interferometer called OptiSurf, measuring the air gaps between lens surfaces and the center thickness of lenses within the optical system. The cross-interaction of both measurement systems enables fast alignment of the lens system, increases measurement accuracy and provides detailed manufacturing quality information.