Patent ID: 8010016

Claim:
An optical unit assembly, comprising: an optical system including an optical component for irradiating a target object with light and receiving the reflected light; a casing for accommodating the optical system; a supporting frame for supporting a part of the casing; and a height adjusting member having a supporting surface for supporting another part of the casing and placed between the supporting frame and the casing, and a lifting mechanism for permitting the casing to be slightly lifted, the slightly lifted state being attained by supporting a part of the casing by means of the supporting frame while releasing the support of another part of the casing by the supporting surface of the height adjusting member; wherein: the height adjusting member is slidable between the supporting frame and the casing in a supported state that the casing is substantially supported by the supporting frame; and the supporting surface includes at least a first supporting surface set at a specified first height position and a second supporting surface set at a second height position different from the first height position.