Patent ID: 7361921

Claim:
A device for optical inspection of a flat surface of an object, said device comprising: a measuring head comprising a lens; a lower object carrier; and an upper object carrier provided for holding the object, said upper object carrier being supported by at least three support places with adjustment drives providing at least two of the three support places, the adjustment drives being provided to operate in conjunction and engagement with said lower object carrier so as to obtain a plane-parallel orientation between a level surface of said upper object carrier and a focus plane of said lens, said measuring head being positioned above a surface of said upper object carrier, said measuring head and said upper object carrier being provided to be moved relative to each other for adjustment with respect to each other, said measuring head being provided for sampling the surface of the object when applied on said upper object carrier in a focus area of the lens, said adjustment drives being provided for adjusting the at least two of the three support places in order to bring said upper object carrier within the focus area of the lens, said adjustment drives being further provided for adjusting the at least two of the three support places for said object when applied on said upper object carrier within the focus area of the lens.