| 摘要 |
<p>An electro-optical head assembly for use in an optical printer or scanner, comprising a linear array (12) of electro-optical elements mounted on an elongate support member (42), a linear lens array (16) held in a rigid lens mount (26) and extending in parallel with said array of electro-optical elements, and means (32, 50, 60) for mounting said lens mount (26) on said support member (42) and maintaining a predetermined distance between said arrays (12, 16) over the whole length thereof, said mounting means comprising two elongate plates (60) provided along opposite longitudinal sides of said arrays and having respective first longitudinal edge portions (62) secured to the support member (42), wherein the second longitudinal edge portion (64) of each plate (60) is secured to the lens mount (26), and each plate (60) is provided with a pattern of holes (72) and/or slots (74,76) leaving in said plate only a number of separate hinge elements (78) which extend from the first (62) to the second longitudinal edge portion (64) and are flexible in longitudinal direction of said arrays (12, 16). With this construction, a correct distance between the lens array (16) and the array (12) of electro-optical elements is maintained over the whole length of the head assembly, even if a slight axial displacement of the lens mount (26) relative to the support member occurs in case of uneven thermal expansion. <IMAGE></p> |
