| 摘要 |
An adjustment apparatus (10) for adjusting the field lens (14) with respect to an LCD imager (13). The field lens (14) may be mounted off center and/or may be only a segment of a complete lens. Guide fingers (20) on an assembly housing (18) fit within guide slots (26) of a field lens mount (16) to prevent relative rotation thereof. The field lens (14) is secured within the field lens mount (16). An internally threaded ring (22) mates with external threads (23) on the field lens mount (16) to move the field lens mount (16) in or out relative to the imager (13). A retainer (28) has preload flexures (30) which press against posts (32) on the field lens mount (16) for providing preload tension thereon. Adjustment teeth (24) on the outside of the threaded ring (22) provide a means for rotating the threaded ring (22).
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