| 摘要 |
<p>A method of fabricating split optical elements (80 and 82; 118 and 120) includes fixing a number of optical members (12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 and 34; 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106 and 108) in a side-by-side arrangement such that abutting optical members have different optical characteristics with respect to manipulating polarization components (158, 160, 162 and 164) of light. In the preferred embodiment, the optical members are fixed to a transparent substrate (36; and 110) by an optically transparent epoxy and the optical members are walk-off crystals having oppositely directed walk-off directions. The arrangement of optical members is segmented to form discrete optical elements comprising first and second portions (12b, 14a, 14b and 16a) supported on a segment of the transparent substrate. The first and second portions exhibit different optical characteristics with respect to manipulating polarization components. In one embodiment, the arrangement is segmented by dicing the optical members in a lengthwise direction in a first series of cuts (56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76 and 78) and dicing the optical members in a widthwise direction in a second series of cuts (38, 40, 42, 44, 46, 48, 50, 52 and 54). In a second embodiment, first and second series of cuts (112 and 114) are both at acute angles to interfaces (116 and 126) between adjacent optical members, yielding optical elements in which oppositely directed walk-off directions of the first and second portions of an element are parallel to the interface between the portions, but at an acute angle to the sides of the element. <IMAGE></p> |
