| 摘要 |
<p>Provided is an information management system, esigned not to sense an unnecessary portion such as a little finger, its root portion or the like of a hand holding a writing tool at the time of performing a writing in a sheet with the writing tool, and performed a writing on the sheet and simultaneously forms the entered contents into electronic data to manage the electronic data. The information management system is provided with a personal computer P which has a display D, and an electronic underlay A which is laid under a sheet K to perform a writing in with a writing tool 10. The electronic underlay A is provided with: a sheet-like optical waveguide W formed by sandwiching lattice-like cores 2 between a sheet-like under cladding layer and a sheet-like over cladding layer; a light emitting element connected to one end surface of each of the cores 2; and a light receiving element connected to another end surface of each of the cores 2. The core 2 has an elasticity modulus larger than an elasticity modulus of the under cladding layer and an elasticity modulus of the over cladding layer.</p> |
