Patent ID: 7649160

Claim:
A method for acquiring a digital image of a specimen comprising the following steps: providing a specimen ( 10 ), sensing said specimen ( 10 ) with a wave front sensor ( 11 ), processing the wave front obtained by said wave front sensor ( 11 ), providing an initial digital wave front (DWF) of said specimen by use of a processing unit ( 12 ) connected to a wave front sensor ( 11 ), providing at least one digital wave front operator (DWFO) defined by use of at least one mathematical model ( 21 ) and by use of at least one set of coefficients, processing said digital wave front (DWF) by use of a wave front processing unit ( 15 ) using at least one of said digital wave front operator (DWFO) and providing a processed digital wave front (PDWF), analyzing with a wave front analysis unit ( 17 ) at least said digital wave front (DWF), said processed digital wave front (PDWF) or a at least one wave front available from said wave front processing unit ( 15 ), providing reference data ( 18 ) from said wave front analysis unit ( 17 ), and using said reference data ( 18 ) for obtaining a digital image of said specimen ( 10 ).