In a method of making a replication tool, replication parts for both two dimensional
optical elements, such as are fabricated using micro-forming techniques, and three
dimensional optical elements, that are typically formed using cutting techniques
are present on the replication tool. A method of manufacturing a replication tool
for a planar optical sheet includes mounting at least one optical element part
on a base to form a master part and forming a conductive metal layer over the master
part. The method also comprises electrochemically depositing over the conductive
metal layer to form an electrochemically deposited layer, separating the electrochemically
deposited layer from the master part. The invention also relates to the replication
tool itself and optical circuits formed using the replication tool.
