Method of connecting precision aligned components by ultraviolet curable adhesive

摘要

In a low cost film scanner, a CCD image sensor 21 is precision aligned to a film plane scanning aperture 12 and is mounted to the an intervening imaging housing assembly 10 by means of a radiation (UV) curable adhesive 31 of appropriate viscosity. With the sensor positioned within but in spaced apart relationship to a sensor housing segment 22 of the housing assembly 10, the adhesive is injected through a mounting hole in a wall of the housing segment to adhere to the image sensor 21. An excess amount of the injected adhesive forms a cap over the mounting hole. The viscosity of the adhesive is such as to allow the adhesive to generally maintain its shape in the space between the sensor and the wall of the sensor housing segment 22. The spacing of the sensor from the sensor housing segment 22 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.