| 摘要 |
A symmetrical prismatic readout apparatus includes a pair of substantially identical prism elements positioned in back-to-back relationship with respect to each other to provide a symmetrical structure. The prism elements have bonding surfaces in which one includes a thin film platinum coating. The bonding surfaces are bonded together through optical bonding, without the use of adhesives. The platinum film forms a beam splitter. The two prism elements are similarly bonded to a substrate element, again by optical bonding, without the use of adhesives. Suitable beam splitter arrangements are provided to effect the desired readouts.
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