Imaging device for measurement processing

摘要

An aspect of the invention provides an imaging device for measurement processing, which comprises: an imaging unit that forms an image; a lens positioned to guide incident light to the imaging unit; and an adjustment mechanism that adjusts the distance between the lens and the imaging unit by moving the lens along the optical axis of the lens, the optical axis extending in a first direction, the adjustment mechanism comprising: a first threaded member having a longitudinal axis extending in a second direction that is different from the first direction, wherein the first threaded member is rotatable around longitudinal axis thereof without moving in the second direction; and a conversion mechanism that converts a rotation of the first threaded member around longitudinal axis thereof into a movement of the lens along the optical axis of the lens.

主权项

1. An imaging device for measurement processing, the imaging device comprising:
a housing; an imaging element configured to form an image, the imaging element being fixed to the housing; a lens positioned to guide incident light to the imaging element; and an adjustment mechanism configured to adjust a distance between the lens and the imaging element by moving the lens along an optical axis of the lens, the optical axis extending in a first direction, the adjustment mechanism comprising: a first threaded member having a longitudinal axis extending in a second direction that is different from the first direction, the first threaded member being rotatable around the longitudinal axis without moving in the second direction; a lens slider including a second threaded member engaging the first threaded member; and a conversion mechanism configured to convert a rotation of the first threaded member around the longitudinal axis into a movement of the lens along the optical axis of the lens, wherein the conversion mechanism movably guides the lens slider along the second direction and moves the lens along the first direction to change an imaging element distance according to a change in position of the lens slider along the second direction due to the rotation of the first threaded member, wherein the adjustment mechanism includes an adjustment unit including the first threaded member, the adjustment unit being attached to the housing so as to be rotatable in a rotating direction of the first threaded member with respect to the housing and so that movement of the first threaded member in the second direction is restrained with respect to the housing, wherein the adjustment mechanism includes a lens holder for supporting the lens, wherein the lens slider has a frame structure which surrounds the lens holder, wherein the conversion mechanism is arranged between the lens holder and the lens slider, and wherein the second threaded member engaging the first threaded member is arranged on an outer side of part of the frame structure extending in the second direction.