| 摘要 |
A human-readable optical data display that contains at least one spare optical output element (700') and means to use said spare optical output element to logically replace at least one replaceable optical output element (700) of said display should said replaceable optical output element be defective, where said replacement of said replaceable element by said spare element does not induce a change of more than 50 microns in the position of the output that would have come from said replaceable element. <IMAGE> |
