An improved imaging array includes a plurality of heterojunction thyristor-based pixel elements disposed within resonant cavities formed on a substrate. The optical system comprises a first prism 3, a second prism 4 and a volume hologram element 6 disposed between them and cemented to them. The cutting unit includes a pressing unit which presses the object held by the holding member, and the cutting information includes a pressing force of the pressing unit. The method further includes configuring a said laser pattern and said patterned underlying layer with respect to one another such that in a said overlap region said patterned underlying layer is substantially undamaged by said stepwise laser ablation. Strong groupings, relatively strong potential groupings, andor other groupings of addresses, potential groupings of addresses, andor groups may be grouped, associated, analyzed, andor presented together.