Ultraviolet curable riveting of precision aligned components

摘要

In a low cost film scanner, a CCD image sensor is precision aligned to a film plane scanning aperture and is mounted to the an intervening imaging housing assembly by means of a radiation (UV) curable adhesive of appropriate viscosity. With the sensor positioned within but in spaced apart relationship to a sensor housing segment of the housing assembly, the adhesive is injected through a mounting hole in a wall of the housing segment to adhere to the image sensor. An excess amount of the injected adhesive forms a cap over the mounting hole. The viscosity of the adhesive is such as the allow the adhesive to generally maintain its shape in the space between the sensor and the wall of the sensor housing segment. The spacing of the sensor from the sensor housing segment allows six degrees of freedom of movement of the sensor during the alignment operation after which the injected adhesive is curing in situ to form a sensor mount fastener with the sensor is precise alignment with the film plane aperture. The hardened cap over the mounting hole provides a solid mechanical bond of the fastener to the housing segment.