| 摘要 |
<p>A mechanism for adjusting the position of optical components (e.g. spatial light modulators in a video display system) comprising a first plate (21) carrying a shaft (25) about which second and third plates (29, 31) are loosely mounted. The plates (29, 31) act on the shaft (25) through a silicone rubber O-ring (37). Tightening one of the bolts (45a, b, c) acts to move a portion of the plates (29, 31) together, compressing a portion of the O-ring (37), which then displaces the plates (29, 31) radially outwardly from the shaft (25). The displacement from the shaft (25), for a given adjustment of each of the bolts (45a, b, c) becomes progressively less with greater compression of the ring (37) so that an initial "coarse" adjustment of the plate position may be followed by a subsequent "fine" adjustment. This increases the ease of positioning to high accuracies.</p> |
