METHOD AND APPARATUS FOR FORMING PLASTIC MULTI-FIBER

摘要

Apparatus for generating a reduced-scale optical image of an x-ray beam pattern or the like. The apparatus includes an optical fiber assembly (38) which forms a two-dimensional input array (42) and whose output ends form a reduced-scale two-dimensional output array (44). A beam converter (34) in the apparatus converts the irradiation beam (29) to a corresponding electron beam, and this beam is converted to a two-dimensional light image of the beam which is directed onto the input array (42). In one embodiment, the optical fibers form a fiber assembly constructed of an array (38) of multifiber reducers (40) which are tapered on progressing between input (48) and output ends (50). In another embodiment, the input array (78) is formed by the elongate input fiber regions of fibers (77) having a parallel, side-by-side arrangement, and the two-dimensional image is produced by scanning a linear electron beam and light-generating strip (76) transversely along the length of the array. In a third embodiment, the input array (113) is also formed by elongate input fiber regions (115) of a group of side-by-side fibers (114), where the two-dimensional image is generated by rotating the array (113) below a full-area electron beam.