| 摘要 |
PROBLEM TO BE SOLVED: To easily manufacture various semispherical lenses including a perfect semispherical lens, and to form the semispherical lens without necessitating substantial work after precisely performing finishing work to a spherical part. SOLUTION: Two raw material glasses 1 are bonded and stuck to form a regular hexahedron glass, and coarse grinding work is performed to the hexahedron glass so as to form an octadecahedron glass near to a sphere, and then precise grinding work is performed to the octadecahedron glass so as to form a regular spherical glass 7. By peeling the bonded surface of the glass 7, two semispherical lenses 8 are formed. COPYRIGHT: (C)2003,JPO
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