| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method capable of highly accurately, simply and efficiently manufacturing a reflective plane-symmetric imaging element, or a principal component constituting a spatial video display device. SOLUTION: A plurality of plate mirrors are superposed and fixed, with their light-reflecting principal surfaces facing in the same one direction to form a parallel mirror block. The parallel mirror block is cut at equal intervals in the direction orthogonal to the light-reflecting principal surface of the plurality of plate mirrors to form at least two mirror sheets in which a plurality of longitudinal light-reflecting surfaces are disposed in parallel. The two mirror sheets are bonded in such a manner that the longitudinal light-reflecting surface of one mirror sheet of the two mirror sheets orthogonally crosses with the longitudinal light-reflecting surface of the other mirror sheet to produce the reflective plane-symmetric imaging element. COPYRIGHT: (C)2012,JPO&INPIT
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