| 摘要 |
A number of k sets of light transmissive members are prepared, k being an integer of 2 or greater, where each set thereof may consist of a plurality of first light transmissive plates and a plurality of second light transmissive plates, and (K+1) third light transmissive plates having a greater thickness than those of the first and the second light transmissive plate. A composite plate member is produced by alternately arranging and bonding one set of the plurality of first light transmissive plates and the plurality of second light transmissive plates to each of the spaces between the (K+1) third light transmissive plates, and alternately arranging a plurality of polarization separating films and a plurality of reflecting films on each interface in the composite plate member. A block substrate having a light receiving surface and a light emitting surface is produced by cutting the composite plate member along a first section parallel to a surface inclining at a predetermined angle with the surface of the composite plate member, the light receiving and light emitting surfaces being parallel to the first section. The light receiving surface and the light emitting surface of the block substrate are polished, and k light transmissive blocks are produced from one block substrate by dividing the block substrate at the positions of the third light transmissive plates disposed inside the block substrate.
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