This modular approach enables OptiSpheric® to be configured or upgraded according to the operator’s requirements. When measuring the EFL, only an approximate range of the expected EFL value has to be selected. The optimal head lens for the selected measurement is displayed. After the focusing is accomplished just a mouse click is necessary to perform the measurement.

The MTF measurement is based either on the edge or narrow slit evaluation. For quick tests in production, the MTF check based on edge evaluation might be the preferred choice. For accurate MTF measurement it is advisable to use the slit evaluation.The OptiSpheric® can be configured to measure the MTF in sagittal and tangential direction or to perform tests on axis or off axis. The system may be manual or motorized, the focusing manual or automated.The spatial frequencies of interest can be selected prior to measurement. The real time measurement results can be compared with the calculated theoretical MTF values. In addition to the real time display of the camera image, a graphical display of the MTF and PSF as well as a table with the real time and theoretical MTF values are available. Further customized display of the data are available on request.