| 摘要 |
<p>A polarizing element obtained by heat-treating a glass base containing many nearly acicular fine particles of a metal halide dispersed and oriented so that the lengthwise directions of the particles are almost the same, in a reducing atmosphere to reduce the fine metal halide particles. The polarizing element has fine metal particles generated in the many regions which were occupied by the individual fine metal halide particles before the reduction. In at least some of the many regions, two or more fine metal particles are present in each region. In the many regions corresponding to at least 90% of the total number of the fine metal halide particles, each region has a volume of 2,500-2,500,000 nm3. In the many regions corresponding to at least 90% of the total number of the fine metal halide particles, the total volume of the multiple fine metal particles present in each region is 4-40% of the volume of the region.</p> |
