Optically imaging sensing device for imaging substrate having redundantly-encoded orientation data

An optically imaging sensing device for imaging a substrate, said substrate having a coded data pattern disposed on a surface thereof, said coded data pattern comprising a plurality of discrete circular target features defining a grid, said grid comprising a plurality of tags with neighboring tags sharing target features, each tag comprising respective tag data encoded by a plurality of macrodot data elements contained in each tag, wherein said plurality of macrodot data elements encode:

• a plurality of Reed-Solomon symbols, wherein a set of said symbols define a Reed-Solomon codeword representing at least some of said tag data;
• and
• an orientation of a layout of said tag data, said orientation being encoded a plurality of times in each tag,
• said optically imaging sensing device comprising:
• an image sensor for imaging part of the coded data pattern;
• a processor configured for:
• determining the orientation of the layout of the tag data;
• and
• decoding the tag data contained in the imaged part of the coded data pattern.