| http://www.w3.org/ns/prov#value | - Also, the same result as shown in FIGS. 8- c and 8-d may be provided with the use of a transmitting reflective plate 34 which is formed of a metal plate, e.g. of aluminum, having a multiplicity of tapered round apertures therein, as illustrated in FIGS. 8- e and 8-f.
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